openwrt/staging/blogic.git
8 years agoMAINTAINERS: Vladimir has moved
Vladimir Davydov [Thu, 1 Sep 2016 23:15:09 +0000 (16:15 -0700)]
MAINTAINERS: Vladimir has moved

vdavydov@{parallels,virtuozzo}.com will bounce from now on.

Link: http://lkml.kernel.org/r/20160831180752.GB10353@esperanza
Signed-off-by: Vladimir Davydov <vdavydov.dev@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agomm, mempolicy: task->mempolicy must be NULL before dropping final reference
David Rientjes [Thu, 1 Sep 2016 23:15:07 +0000 (16:15 -0700)]
mm, mempolicy: task->mempolicy must be NULL before dropping final reference

KASAN allocates memory from the page allocator as part of
kmem_cache_free(), and that can reference current->mempolicy through any
number of allocation functions.  It needs to be NULL'd out before the
final reference is dropped to prevent a use-after-free bug:

BUG: KASAN: use-after-free in alloc_pages_current+0x363/0x370 at addr ffff88010b48102c
CPU: 0 PID: 15425 Comm: trinity-c2 Not tainted 4.8.0-rc2+ #140
...
Call Trace:
dump_stack
kasan_object_err
kasan_report_error
__asan_report_load2_noabort
alloc_pages_current <-- use after free
depot_save_stack
save_stack
kasan_slab_free
kmem_cache_free
__mpol_put <-- free
do_exit

This patch sets current->mempolicy to NULL before dropping the final
reference.

Link: http://lkml.kernel.org/r/alpine.DEB.2.10.1608301442180.63329@chino.kir.corp.google.com
Fixes: cd11016e5f52 ("mm, kasan: stackdepot implementation. Enable stackdepot for SLAB")
Signed-off-by: David Rientjes <rientjes@google.com>
Reported-by: Vegard Nossum <vegard.nossum@oracle.com>
Acked-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: <stable@vger.kernel.org> [4.6+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agoprintk/nmi: avoid direct printk()-s from __printk_nmi_flush()
Sergey Senozhatsky [Thu, 1 Sep 2016 23:15:04 +0000 (16:15 -0700)]
printk/nmi: avoid direct printk()-s from __printk_nmi_flush()

__printk_nmi_flush() can be called from nmi_panic(), therefore it has to
test whether it's executed in NMI context and thus must route the
messages through deferred printk() or via direct printk().

This is to avoid potential deadlocks, as described in commit
cf9b1106c81c ("printk/nmi: flush NMI messages on the system panic").

However there remain two places where __printk_nmi_flush() does
unconditional direct printk() calls:

 - pr_err("printk_nmi_flush: internal error ...")
 - pr_cont("\n")

Factor out print_nmi_seq_line() parts into a new printk_nmi_flush_line()
function, which takes care of in_nmi(), and use it in
__printk_nmi_flush() for printing and error-reporting.

Link: http://lkml.kernel.org/r/20160830161354.581-1-sergey.senozhatsky@gmail.com
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agotreewide: remove references to the now unnecessary DEFINE_PCI_DEVICE_TABLE
Joe Perches [Thu, 1 Sep 2016 23:15:01 +0000 (16:15 -0700)]
treewide: remove references to the now unnecessary DEFINE_PCI_DEVICE_TABLE

It's been eliminated from the sources, remove it from everywhere else.

Link: http://lkml.kernel.org/r/076eff466fd7edb550c25c8b25d76924ca0eba62.1472660229.git.joe@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Cc: "James E.J. Bottomley" <jejb@linux.vnet.ibm.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Andy Whitcroft <apw@canonical.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agodrivers/scsi/wd719x.c: remove last declaration using DEFINE_PCI_DEVICE_TABLE
Joe Perches [Thu, 1 Sep 2016 23:14:58 +0000 (16:14 -0700)]
drivers/scsi/wd719x.c: remove last declaration using DEFINE_PCI_DEVICE_TABLE

Convert it to the preferred const struct pci_device_id instead.

Link: http://lkml.kernel.org/r/95c5e4100c3cd4eda643624f5b70e8d7abceb86c.1472660229.git.joe@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com>
Cc: "James E.J. Bottomley" <jejb@linux.vnet.ibm.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agomm, vmscan: only allocate and reclaim from zones with pages managed by the buddy...
Mel Gorman [Thu, 1 Sep 2016 23:14:55 +0000 (16:14 -0700)]
mm, vmscan: only allocate and reclaim from zones with pages managed by the buddy allocator

Firmware Assisted Dump (FA_DUMP) on ppc64 reserves substantial amounts
of memory when booting a secondary kernel.  Srikar Dronamraju reported
that multiple nodes may have no memory managed by the buddy allocator
but still return true for populated_zone().

Commit 1d82de618ddd ("mm, vmscan: make kswapd reclaim in terms of
nodes") was reported to cause kswapd to spin at 100% CPU usage when
fadump was enabled.  The old code happened to deal with the situation of
a populated node with zero free pages by co-incidence but the current
code tries to reclaim populated zones without realising that is
impossible.

We cannot just convert populated_zone() as many existing users really
need to check for present_pages.  This patch introduces a managed_zone()
helper and uses it in the few cases where it is critical that the check
is made for managed pages -- zonelist construction and page reclaim.

Link: http://lkml.kernel.org/r/20160831195104.GB8119@techsingularity.net
Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Reported-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Tested-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agolib/test_hash.c: fix warning in preprocessor symbol evaluation
Geert Uytterhoeven [Thu, 1 Sep 2016 23:14:53 +0000 (16:14 -0700)]
lib/test_hash.c: fix warning in preprocessor symbol evaluation

Some versions of gcc don't like tests for the value of an undefined
preprocessor symbol, even in the #else branch of an #ifndef:

    lib/test_hash.c:224:7: warning: "HAVE_ARCH__HASH_32" is not defined [-Wundef]
     #elif HAVE_ARCH__HASH_32 != 1
   ^
    lib/test_hash.c:229:7: warning: "HAVE_ARCH_HASH_32" is not defined [-Wundef]
     #elif HAVE_ARCH_HASH_32 != 1
   ^
    lib/test_hash.c:234:7: warning: "HAVE_ARCH_HASH_64" is not defined [-Wundef]
     #elif HAVE_ARCH_HASH_64 != 1
   ^

Seen with gcc 4.9, not seen with 4.1.2.

Change the logic to only check the value inside an #ifdef to fix this.

Fixes: 468a9428521e7d00 ("<linux/hash.h>: Add support for architecture-specific functions")
Link: http://lkml.kernel.org/r/20160829214952.1334674-4-arnd@arndb.de
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: George Spelvin <linux@sciencehorizons.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agolib/test_hash.c: fix warning in two-dimensional array init
Geert Uytterhoeven [Thu, 1 Sep 2016 23:14:50 +0000 (16:14 -0700)]
lib/test_hash.c: fix warning in two-dimensional array init

  lib/test_hash.c: In function 'test_hash_init':
  lib/test_hash.c:146:2: warning: missing braces around initializer [-Wmissing-braces]

Fixes: 468a9428521e7d00 ("<linux/hash.h>: Add support for architecture-specific functions")
Link: http://lkml.kernel.org/r/20160829214952.1334674-3-arnd@arndb.de
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: George Spelvin <linux@sciencehorizons.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agokconfig: tinyconfig: provide whole choice blocks to avoid warnings
Arnd Bergmann [Thu, 1 Sep 2016 23:14:47 +0000 (16:14 -0700)]
kconfig: tinyconfig: provide whole choice blocks to avoid warnings

Using "make tinyconfig" produces a couple of annoying warnings that show
up for build test machines all the time:

    .config:966:warning: override: NOHIGHMEM changes choice state
    .config:965:warning: override: SLOB changes choice state
    .config:963:warning: override: KERNEL_XZ changes choice state
    .config:962:warning: override: CC_OPTIMIZE_FOR_SIZE changes choice state
    .config:933:warning: override: SLOB changes choice state
    .config:930:warning: override: CC_OPTIMIZE_FOR_SIZE changes choice state
    .config:870:warning: override: SLOB changes choice state
    .config:868:warning: override: KERNEL_XZ changes choice state
    .config:867:warning: override: CC_OPTIMIZE_FOR_SIZE changes choice state

I've made a previous attempt at fixing them and we discussed a number of
alternatives.

I tried changing the Makefile to use "merge_config.sh -n
$(fragment-list)" but couldn't get that to work properly.

This is yet another approach, based on the observation that we do want
to see a warning for conflicting 'choice' options, and that we can
simply make them non-conflicting by listing all other options as
disabled.  This is a trivial patch that we can apply independent of
plans for other changes.

Link: http://lkml.kernel.org/r/20160829214952.1334674-2-arnd@arndb.de
Link: https://storage.kernelci.org/mainline/v4.7-rc6/x86-tinyconfig/build.log
https://patchwork.kernel.org/patch/9212749/
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Reviewed-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agokexec: fix double-free when failing to relocate the purgatory
Thiago Jung Bauermann [Thu, 1 Sep 2016 23:14:44 +0000 (16:14 -0700)]
kexec: fix double-free when failing to relocate the purgatory

If kexec_apply_relocations fails, kexec_load_purgatory frees pi->sechdrs
and pi->purgatory_buf.  This is redundant, because in case of error
kimage_file_prepare_segments calls kimage_file_post_load_cleanup, which
will also free those buffers.

This causes two warnings like the following, one for pi->sechdrs and the
other for pi->purgatory_buf:

  kexec-bzImage64: Loading purgatory failed
  ------------[ cut here ]------------
  WARNING: CPU: 1 PID: 2119 at mm/vmalloc.c:1490 __vunmap+0xc1/0xd0
  Trying to vfree() nonexistent vm area (ffffc90000e91000)
  Modules linked in:
  CPU: 1 PID: 2119 Comm: kexec Not tainted 4.8.0-rc3+ #5
  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
  Call Trace:
    dump_stack+0x4d/0x65
    __warn+0xcb/0xf0
    warn_slowpath_fmt+0x4f/0x60
    ? find_vmap_area+0x19/0x70
    ? kimage_file_post_load_cleanup+0x47/0xb0
    __vunmap+0xc1/0xd0
    vfree+0x2e/0x70
    kimage_file_post_load_cleanup+0x5e/0xb0
    SyS_kexec_file_load+0x448/0x680
    ? putname+0x54/0x60
    ? do_sys_open+0x190/0x1f0
    entry_SYSCALL_64_fastpath+0x13/0x8f
  ---[ end trace 158bb74f5950ca2b ]---

Fix by setting pi->sechdrs an pi->purgatory_buf to NULL, since vfree
won't try to free a NULL pointer.

Link: http://lkml.kernel.org/r/1472083546-23683-1-git-send-email-bauerman@linux.vnet.ibm.com
Signed-off-by: Thiago Jung Bauermann <bauerman@linux.vnet.ibm.com>
Acked-by: Baoquan He <bhe@redhat.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agomm, oom: prevent premature OOM killer invocation for high order request
Michal Hocko [Thu, 1 Sep 2016 23:14:41 +0000 (16:14 -0700)]
mm, oom: prevent premature OOM killer invocation for high order request

There have been several reports about pre-mature OOM killer invocation
in 4.7 kernel when order-2 allocation request (for the kernel stack)
invoked OOM killer even during basic workloads (light IO or even kernel
compile on some filesystems).  In all reported cases the memory is
fragmented and there are no order-2+ pages available.  There is usually
a large amount of slab memory (usually dentries/inodes) and further
debugging has shown that there are way too many unmovable blocks which
are skipped during the compaction.  Multiple reporters have confirmed
that the current linux-next which includes [1] and [2] helped and OOMs
are not reproducible anymore.

A simpler fix for the late rc and stable is to simply ignore the
compaction feedback and retry as long as there is a reclaim progress and
we are not getting OOM for order-0 pages.  We already do that for
CONFING_COMPACTION=n so let's reuse the same code when compaction is
enabled as well.

[1] http://lkml.kernel.org/r/20160810091226.6709-1-vbabka@suse.cz
[2] http://lkml.kernel.org/r/f7a9ea9d-bb88-bfd6-e340-3a933559305a@suse.cz

Fixes: 0a0337e0d1d1 ("mm, oom: rework oom detection")
Link: http://lkml.kernel.org/r/20160823074339.GB23577@dhcp22.suse.cz
Signed-off-by: Michal Hocko <mhocko@suse.com>
Tested-by: Olaf Hering <olaf@aepfle.de>
Tested-by: Ralf-Peter Rohbeck <Ralf-Peter.Rohbeck@quantum.com>
Cc: Markus Trippelsdorf <markus@trippelsdorf.de>
Cc: Arkadiusz Miskiewicz <a.miskiewicz@gmail.com>
Cc: Ralf-Peter Rohbeck <Ralf-Peter.Rohbeck@quantum.com>
Cc: Jiri Slaby <jslaby@suse.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Joonsoo Kim <js1304@gmail.com>
Cc: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Cc: David Rientjes <rientjes@google.com>
Cc: <stable@vger.kernel.org> [4.7.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agoMerge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Linus Torvalds [Wed, 31 Aug 2016 16:42:14 +0000 (09:42 -0700)]
Merge branch 'linus' of git://git./linux/kernel/git/herbert/crypto-2.6

Pull crypto fixes from Herbert Xu:
 "This fixes the following issues:

   - Kconfig problem that prevented mxc-rnga from being enabled

   - bogus key sizes in qat aes-xts

   - buggy aes-xts code in vmx"

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: vmx - fix null dereference in p8_aes_xts_crypt
  crypto: qat - fix aes-xts key sizes
  hwrng: mxc-rnga - Fix Kconfig dependency

8 years agobinfmt_elf: switch to new creds when switching to new mm
Linus Torvalds [Mon, 22 Aug 2016 23:41:46 +0000 (16:41 -0700)]
binfmt_elf: switch to new creds when switching to new mm

We used to delay switching to the new credentials until after we had
mapped the executable (and possible elf interpreter).  That was kind of
odd to begin with, since the new executable will actually then _run_
with the new creds, but whatever.

The bigger problem was that we also want to make sure that we turn off
prof events and tracing before we start mapping the new executable
state.  So while this is a cleanup, it's also a fix for a possible
information leak.

Reported-by: Robert Święcki <robert@swiecki.net>
Tested-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: David Howells <dhowells@redhat.com>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Andy Lutomirski <luto@amacapital.net>
Acked-by: Eric W. Biederman <ebiederm@xmission.com>
Cc: Willy Tarreau <w@1wt.eu>
Cc: Kees Cook <keescook@chromium.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agoMerge tag 'seccomp-v4.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/kees...
Linus Torvalds [Tue, 30 Aug 2016 23:25:57 +0000 (16:25 -0700)]
Merge tag 'seccomp-v4.8-rc5' of git://git./linux/kernel/git/kees/linux

Pull seccomp fix from Kees Cook:
 "Fix fatal signal delivery after ptrace reordering"

* tag 'seccomp-v4.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  seccomp: Fix tracer exit notifications during fatal signals

8 years agoseccomp: Fix tracer exit notifications during fatal signals
Kees Cook [Wed, 10 Aug 2016 23:28:09 +0000 (16:28 -0700)]
seccomp: Fix tracer exit notifications during fatal signals

This fixes a ptrace vs fatal pending signals bug as manifested in
seccomp now that seccomp was reordered to happen after ptrace. The
short version is that seccomp should not attempt to call do_exit()
while fatal signals are pending under a tracer. The existing code was
trying to be as defensively paranoid as possible, but it now ends up
confusing ptrace. Instead, the syscall can just be skipped (which solves
the original concern that the do_exit() was addressing) and normal signal
handling, tracer notification, and process death can happen.

Paraphrasing from the original bug report:

If a tracee task is in a PTRACE_EVENT_SECCOMP trap, or has been resumed
after such a trap but not yet been scheduled, and another task in the
thread-group calls exit_group(), then the tracee task exits without the
ptracer receiving a PTRACE_EVENT_EXIT notification. Test case here:
https://gist.github.com/khuey/3c43ac247c72cef8c956ca73281c9be7

The bug happens because when __seccomp_filter() detects
fatal_signal_pending(), it calls do_exit() without dequeuing the fatal
signal. When do_exit() sends the PTRACE_EVENT_EXIT notification and
that task is descheduled, __schedule() notices that there is a fatal
signal pending and changes its state from TASK_TRACED to TASK_RUNNING.
That prevents the ptracer's waitpid() from returning the ptrace event.
A more detailed analysis is here:
https://github.com/mozilla/rr/issues/1762#issuecomment-237396255.

Reported-by: Robert O'Callahan <robert@ocallahan.org>
Reported-by: Kyle Huey <khuey@kylehuey.com>
Tested-by: Kyle Huey <khuey@kylehuey.com>
Fixes: 93e35efb8de4 ("x86/ptrace: run seccomp after ptrace")
Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: James Morris <james.l.morris@oracle.com>
8 years agoMerge tag 'md/4.8-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md
Linus Torvalds [Tue, 30 Aug 2016 18:24:04 +0000 (11:24 -0700)]
Merge tag 'md/4.8-rc4' of git://git./linux/kernel/git/shli/md

Pull MD fixes from Shaohua Li:
 "This includes several bug fixes:

   - Alexey Obitotskiy fixed a hang for faulty raid5 array with external
     management

   - Song Liu fixed two raid5 journal related bugs

   - Tomasz Majchrzak fixed a bad block recording issue and an
     accounting issue for raid10

   - ZhengYuan Liu fixed an accounting issue for raid5

   - I fixed a potential race condition and memory leak with DIF/DIX
     enabled

   - other trival fixes"

* tag 'md/4.8-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md:
  raid5: avoid unnecessary bio data set
  raid5: fix memory leak of bio integrity data
  raid10: record correct address of bad block
  md-cluster: fix error return code in join()
  r5cache: set MD_JOURNAL_CLEAN correctly
  md: don't print the same repeated messages about delayed sync operation
  md: remove obsolete ret in md_start_sync
  md: do not count journal as spare in GET_ARRAY_INFO
  md: Prevent IO hold during accessing to faulty raid5 array
  MD: hold mddev lock to change bitmap location
  raid5: fix incorrectly counter of conf->empty_inactive_list_nr
  raid10: increment write counter after bio is split

8 years agoMerge tag 'nfs-for-4.8-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Linus Torvalds [Tue, 30 Aug 2016 18:14:02 +0000 (11:14 -0700)]
Merge tag 'nfs-for-4.8-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull NFS client bugfixes from Trond Myklebust:
 "Highlights include:

  Stable patches:
   - Fix a refcount leak in nfs_callback_up_net
   - Fix an Oopsable condition when the flexfile pNFS driver connection
     to the DS fails
   - Fix an Oopsable condition in NFSv4.1 server callback races
   - Ensure pNFS clients stop doing I/O to the DS if their lease has
     expired, as required by the NFSv4.1 protocol

  Bugfixes:
   - Fix potential looping in the NFSv4.x migration code
   - Patch series to close callback races for OPEN, LAYOUTGET and
     LAYOUTRETURN
   - Silence WARN_ON when NFSv4.1 over RDMA is in use
   - Fix a LAYOUTCOMMIT race in the pNFS/blocks client
   - Fix pNFS timeout issues when the DS fails"

* tag 'nfs-for-4.8-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  NFSv4.x: Fix a refcount leak in nfs_callback_up_net
  NFS4: Avoid migration loops
  pNFS/flexfiles: Fix an Oopsable condition when connection to the DS fails
  NFSv4.1: Remove obsolete and incorrrect assignment in nfs4_callback_sequence
  NFSv4.1: Close callback races for OPEN, LAYOUTGET and LAYOUTRETURN
  NFSv4.1: Defer bumping the slot sequence number until we free the slot
  NFSv4.1: Delay callback processing when there are referring triples
  NFSv4.1: Fix Oopsable condition in server callback races
  SUNRPC: Silence WARN_ON when NFSv4.1 over RDMA is in use
  pnfs/blocklayout: update last_write_offset atomically with extents
  pNFS: The client must not do I/O to the DS if it's lease has expired
  pNFS: Handle NFS4ERR_OLD_STATEID correctly in LAYOUTSTAT calls
  pNFS/flexfiles: Set reasonable default retrans values for the data channel
  NFS: Allow the mount option retrans=0
  pNFS/flexfiles: Fix layoutstat periodic reporting

8 years agomm/usercopy: get rid of CONFIG_DEBUG_STRICT_USER_COPY_CHECKS
Josh Poimboeuf [Tue, 30 Aug 2016 13:04:16 +0000 (08:04 -0500)]
mm/usercopy: get rid of CONFIG_DEBUG_STRICT_USER_COPY_CHECKS

There are three usercopy warnings which are currently being silenced for
gcc 4.6 and newer:

1) "copy_from_user() buffer size is too small" compile warning/error

   This is a static warning which happens when object size and copy size
   are both const, and copy size > object size.  I didn't see any false
   positives for this one.  So the function warning attribute seems to
   be working fine here.

   Note this scenario is always a bug and so I think it should be
   changed to *always* be an error, regardless of
   CONFIG_DEBUG_STRICT_USER_COPY_CHECKS.

2) "copy_from_user() buffer size is not provably correct" compile warning

   This is another static warning which happens when I enable
   __compiletime_object_size() for new compilers (and
   CONFIG_DEBUG_STRICT_USER_COPY_CHECKS).  It happens when object size
   is const, but copy size is *not*.  In this case there's no way to
   compare the two at build time, so it gives the warning.  (Note the
   warning is a byproduct of the fact that gcc has no way of knowing
   whether the overflow function will be called, so the call isn't dead
   code and the warning attribute is activated.)

   So this warning seems to only indicate "this is an unusual pattern,
   maybe you should check it out" rather than "this is a bug".

   I get 102(!) of these warnings with allyesconfig and the
   __compiletime_object_size() gcc check removed.  I don't know if there
   are any real bugs hiding in there, but from looking at a small
   sample, I didn't see any.  According to Kees, it does sometimes find
   real bugs.  But the false positive rate seems high.

3) "Buffer overflow detected" runtime warning

   This is a runtime warning where object size is const, and copy size >
   object size.

All three warnings (both static and runtime) were completely disabled
for gcc 4.6 with the following commit:

  2fb0815c9ee6 ("gcc4: disable __compiletime_object_size for GCC 4.6+")

That commit mistakenly assumed that the false positives were caused by a
gcc bug in __compiletime_object_size().  But in fact,
__compiletime_object_size() seems to be working fine.  The false
positives were instead triggered by #2 above.  (Though I don't have an
explanation for why the warnings supposedly only started showing up in
gcc 4.6.)

So remove warning #2 to get rid of all the false positives, and re-enable
warnings #1 and #3 by reverting the above commit.

Furthermore, since #1 is a real bug which is detected at compile time,
upgrade it to always be an error.

Having done all that, CONFIG_DEBUG_STRICT_USER_COPY_CHECKS is no longer
needed.

Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: "H . Peter Anvin" <hpa@zytor.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Byungchul Park <byungchul.park@lge.com>
Cc: Nilay Vaish <nilayvaish@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agoMerge branch 'for-4.8-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj...
Linus Torvalds [Tue, 30 Aug 2016 16:44:11 +0000 (09:44 -0700)]
Merge branch 'for-4.8-fixes' of git://git./linux/kernel/git/tj/libata

Pull libata fixes from Tejun Heo:
 "Two libata driver specific fixes for v4.8-rc4.  Nothing too scary"

* 'for-4.8-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
  pata_ninja32: Avoid corrupting status flags
  ahci: disable correct irq for dummy ports

8 years agoMerge branch 'for-4.8-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj...
Linus Torvalds [Tue, 30 Aug 2016 16:31:59 +0000 (09:31 -0700)]
Merge branch 'for-4.8-fixes' of git://git./linux/kernel/git/tj/cgroup

Pull cgroup fixes from Tejun Heo:
 "Two fixes for cgroup.

   - There still was a hole in enforcing cpuset rules, fixed by Li.

   - The recent switch to global percpu_rwseom for threadgroup locking
     revealed a couple issues in how percpu_rwsem is implemented and
     used by cgroup.  Balbir found that the read locking section was too
     wide unnecessarily including operations which can often depend on
     IOs.  With percpu_rwsem updates (coming through a different tree)
     and reduction of read locking section, all the reported locking
     latency issues, including the android one, are resolved.

  It looks like we can keep global percpu_rwsem locking for now.  If
  there actually are cases which can't be resolved, we can go back to
  more complex per-signal_struct locking"

* 'for-4.8-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
  cgroup: reduce read locked section of cgroup_threadgroup_rwsem during fork
  cpuset: make sure new tasks conform to the current config of the cpuset

8 years agopata_ninja32: Avoid corrupting status flags
Alan Cox [Tue, 30 Aug 2016 15:47:02 +0000 (16:47 +0100)]
pata_ninja32: Avoid corrupting status flags

Ninja32 needs to set some flags to indicate it does 32bit IO. However it currently assigns this which
loses the initializing flag and causes a warning spew. Fix it to use a logical or as is intended.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Tested-by: Ellmar Stelnberger <estellnb@elstel.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
8 years agoNFSv4.x: Fix a refcount leak in nfs_callback_up_net
Trond Myklebust [Mon, 29 Aug 2016 15:15:36 +0000 (11:15 -0400)]
NFSv4.x: Fix a refcount leak in nfs_callback_up_net

On error, the callers expect us to return without bumping
nn->cb_users[].

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Cc: stable@vger.kernel.org # v3.7+
8 years agoNFS4: Avoid migration loops
Benjamin Coddington [Tue, 30 Aug 2016 13:20:32 +0000 (09:20 -0400)]
NFS4: Avoid migration loops

If a server returns itself as a location while migrating, the client may
end up getting stuck attempting to migrate twice to the same server.  Catch
this by checking if the nfs_client found is the same as the existing
client.  For the other two callers to nfs4_set_client, the nfs_client will
always be ERR_PTR(-EINVAL).

Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agoMerge tag 'hwmon-for-linus-v4.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Tue, 30 Aug 2016 02:12:35 +0000 (19:12 -0700)]
Merge tag 'hwmon-for-linus-v4.8-rc5' of git://git./linux/kernel/git/groeck/linux-staging

Pull hwmon fix from Guenter Roeck:
 "Add missing sysfs attribute group terminator to it87 driver"

* tag 'hwmon-for-linus-v4.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  hwmon: (it87) Add missing sysfs attribute group terminator

8 years agoMerge tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Mon, 29 Aug 2016 19:37:11 +0000 (12:37 -0700)]
Merge tag 'ext4_for_linus_stable' of git://git./linux/kernel/git/tytso/ext4

Pull ext4 fixes from Ted Ts'o:
 "Fix bugs that could cause kernel deadlocks or file system corruption
  while moving xattrs to expand the extended inode.

  Also add some sanity checks to the block group descriptors to make
  sure we don't end up overwriting the superblock"

* tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  ext4: avoid deadlock when expanding inode size
  ext4: properly align shifted xattrs when expanding inodes
  ext4: fix xattr shifting when expanding inodes part 2
  ext4: fix xattr shifting when expanding inodes
  ext4: validate that metadata blocks do not overlap superblock
  ext4: reserve xattr index for the Hurd

8 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Linus Torvalds [Mon, 29 Aug 2016 19:29:13 +0000 (12:29 -0700)]
Merge git://git./linux/kernel/git/davem/net

Pull networking fixes from David Miller:

 1) Segregate namespaces properly in conntrack dumps, from Liping Zhang.

 2) tcp listener refcount fix in netfilter tproxy, from Eric Dumazet.

 3) Fix timeouts in qed driver due to xmit_more, from Yuval Mintz.

 4) Fix use-after-free in tcp_xmit_retransmit_queue().

 5) Userspace header fixups (use of __u32, missing includes, etc.) from
    Mikko Rapeli.

 6) Further refinements to fragmentation wrt gso and tunnels, from
    Shmulik Ladkani.

 7) Trigger poll correctly for zero length UDP packets, from Eric
    Dumazet.

 8) TCP window scaling fix, also from Eric Dumazet.

 9) SLAB_DESTROY_BY_RCU is not relevant any more for UDP sockets.

10) Module refcount leak in qdisc_create_dflt(), from Eric Dumazet.

11) Fix deadlock in cp_rx_poll() of 8139cp driver, from Gao Feng.

12) Memory leak in rhashtable's alloc_bucket_locks(), from Eric Dumazet.

13) Add new device ID to alx driver, from Owen Lin.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (83 commits)
  Add Killer E2500 device ID in alx driver.
  net: smc91x: fix SMC accesses
  Documentation: networking: dsa: Remove platform device TODO
  net/mlx5: Increase number of ethtool steering priorities
  net/mlx5: Add error prints when validate ETS failed
  net/mlx5e: Fix memory leak if refreshing TIRs fails
  net/mlx5e: Add ethtool counter for TX xmit_more
  net/mlx5e: Fix ethtool -g/G rx ring parameter report with striding RQ
  net/mlx5e: Don't wait for SQ completions on close
  net/mlx5e: Don't post fragmented MPWQE when RQ is disabled
  net/mlx5e: Don't wait for RQ completions on close
  net/mlx5e: Limit UMR length to the device's limitation
  rhashtable: fix a memory leak in alloc_bucket_locks()
  sfc: fix potential stack corruption from running past stat bitmask
  team: loadbalance: push lacpdus to exact delivery
  net: hns: dereference ppe_cb->ppe_common_cb if it is non-null
  8139cp: Fix one possible deadloop in cp_rx_poll
  i40e: Change some init flow for the client
  Revert "phy: IRQ cannot be shared"
  net: dsa: bcm_sf2: Fix race condition while unmasking interrupts
  ...

8 years agopNFS/flexfiles: Fix an Oopsable condition when connection to the DS fails
Trond Myklebust [Mon, 29 Aug 2016 19:12:54 +0000 (15:12 -0400)]
pNFS/flexfiles: Fix an Oopsable condition when connection to the DS fails

If the attempt to connect to a DS fails inside ff_layout_pg_init_read or
ff_layout_pg_init_write, then we currently end up clearing the layout
segment carried by the struct nfs_pageio_descriptor, causing an Oops
when we later call into ff_layout_read_pagelist/ff_layout_write_pagelist.

The fix is to ensure we return the layout and then retry.

Fixes: 446ca2195303 ("pNFS/flexfiles: When initing reads or writes, we...")
Cc: stable@vger.kernel.org # v4.7+
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agoMerge tag 'platform-drivers-x86-v4.8-4' of git://git.infradead.org/users/dvhart/linux...
Linus Torvalds [Mon, 29 Aug 2016 19:20:22 +0000 (12:20 -0700)]
Merge tag 'platform-drivers-x86-v4.8-4' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86

Pull x86 platform driver fixes from Darren Hart:
 "Remove module related code from two drivers that are only configurable
  as built-in: intel_pmic_gpio and platform/olpc"

* tag 'platform-drivers-x86-v4.8-4' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86:
  intel_pmic_gpio: Make explicitly non-modular
  platform/olpc: Make ec explicitly non-modular

8 years agoMerge tag 'powerpc-4.8-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc...
Linus Torvalds [Mon, 29 Aug 2016 19:12:15 +0000 (12:12 -0700)]
Merge tag 'powerpc-4.8-4' of git://git./linux/kernel/git/powerpc/linux

Pull powerpc fixes from Ben Herrenschmidt:
 "This was meant to be sent early last week, but I has a change pending
  on one of the fixes and other things made me forget all about.  Ugh.

  We have some misc fixes for powerpc 4.8.  Some trivial bits and some
  regressions, and a trivial cleanup or two that I saw no point in
  letting rot in patchwork"

* tag 'powerpc-4.8-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc: signals: Discard transaction state from signal frames
  powerpc/powernv : Drop reference added by kset_find_obj()
  powerpc/tm: do not use r13 for tabort_syscall
  powerpc: move hmi.c to arch/powerpc/kvm/
  powerpc: sysdev: cpm: fix gpio save_regs functions
  powerpc/pseries: PACA save area fix for MCE vs MCE
  powerpc/pseries: PACA save area fix for general exception vs MCE
  powerpc/prom: Fix sub-processor option passed to ibm, client-architecture-support
  powerpc, hotplug: Avoid to touch non-existent cpumasks.
  powerpc: migrate exception table users off module.h and onto extable.h
  powerpc/powernv/pci: fix iterator signedness
  powerpc/pseries: use pci_host_bridge.release_fn() to kfree(phb)
  cxl: use pcibios_free_controller_deferred() when removing vPHBs
  powerpc: mpc8349emitx: Delete unnecessary assignment for the field "owner"
  powerpc/512x: Delete unnecessary assignment for the field "owner"
  drivers/macintosh: Delete owner assignment
  powerpc: cputhreads: Add missing include file

8 years agohwmon: (it87) Add missing sysfs attribute group terminator
Jean Delvare [Mon, 29 Aug 2016 11:18:23 +0000 (13:18 +0200)]
hwmon: (it87) Add missing sysfs attribute group terminator

Attribute array it87_attributes_in lacks its NULL terminator,
causing random behavior when operating on the attribute group.

Fixes: 52929715634a ("hwmon: (it87) Use is_visible for voltage sensors")
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Cc: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: stable@vger.kernel.org
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
8 years agointel_pmic_gpio: Make explicitly non-modular
Paul Gortmaker [Mon, 15 Aug 2016 22:24:59 +0000 (18:24 -0400)]
intel_pmic_gpio: Make explicitly non-modular

The Kconfig entry controlling compilation of this code is:

drivers/platform/x86/Kconfig:config GPIO_INTEL_PMIC
drivers/platform/x86/Kconfig:   bool "Intel PMIC GPIO support"

...meaning that it currently is not being built as a module by anyone.

Lets remove the couple traces of modular infrastructure use, so that
when reading the driver there is no doubt it is builtin-only.

We delete the MODULE_LICENSE tag etc. since all that information
was (or is now) contained at the top of the file in the comments.

We don't replace module.h with init.h since the file already has that.

Cc: Alek Du <alek.du@intel.com>
Cc: platform-driver-x86@vger.kernel.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
8 years agoplatform/olpc: Make ec explicitly non-modular
Paul Gortmaker [Mon, 15 Aug 2016 22:25:17 +0000 (18:25 -0400)]
platform/olpc: Make ec explicitly non-modular

The Kconfig entry controlling compilation of this code is:

arch/x86/Kconfig:config OLPC
arch/x86/Kconfig:       bool "One Laptop Per Child support"

...meaning that it currently is not being built as a module by anyone.

Lets remove the couple traces of modular infrastructure use, so that
when reading the driver there is no doubt it is builtin-only.

We delete the MODULE_LICENSE tag etc. since all that information
was (or is now) contained at the top of the file in the comments.

Cc: platform-driver-x86@vger.kernel.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Acked-by: Andres Salomon <dilinger@queued.net>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
8 years agoAdd Killer E2500 device ID in alx driver.
Owen Lin [Fri, 26 Aug 2016 05:49:09 +0000 (13:49 +0800)]
Add Killer E2500 device ID in alx driver.

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: smc91x: fix SMC accesses
Russell King [Sat, 27 Aug 2016 16:33:03 +0000 (17:33 +0100)]
net: smc91x: fix SMC accesses

Commit b70661c70830 ("net: smc91x: use run-time configuration on all ARM
machines") broke some ARM platforms through several mistakes.  Firstly,
the access size must correspond to the following rule:

(a) at least one of 16-bit or 8-bit access size must be supported
(b) 32-bit accesses are optional, and may be enabled in addition to
    the above.

Secondly, it provides no emulation of 16-bit accesses, instead blindly
making 16-bit accesses even when the platform specifies that only 8-bit
is supported.

Reorganise smc91x.h so we can make use of the existing 16-bit access
emulation already provided - if 16-bit accesses are supported, use
16-bit accesses directly, otherwise if 8-bit accesses are supported,
use the provided 16-bit access emulation.  If neither, BUG().  This
exactly reflects the driver behaviour prior to the commit being fixed.

Since the conversion incorrectly cut down the available access sizes on
several platforms, we also need to go through every platform and fix up
the overly-restrictive access size: Arnd assumed that if a platform can
perform 32-bit, 16-bit and 8-bit accesses, then only a 32-bit access
size needed to be specified - not so, all available access sizes must
be specified.

This likely fixes some performance regressions in doing this: if a
platform does not support 8-bit accesses, 8-bit accesses have been
emulated by performing a 16-bit read-modify-write access.

Tested on the Intel Assabet/Neponset platform, which supports only 8-bit
accesses, which was broken by the original commit.

Fixes: b70661c70830 ("net: smc91x: use run-time configuration on all ARM machines")
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Tested-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoDocumentation: networking: dsa: Remove platform device TODO
Florian Fainelli [Sat, 27 Aug 2016 22:34:20 +0000 (15:34 -0700)]
Documentation: networking: dsa: Remove platform device TODO

Since commit 83c0afaec7b7 ("net: dsa: Add new binding implementation"),
the shortcomings of the dsa platform device have been addressed, remove
that TODO item.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'mlx5-series'
David S. Miller [Mon, 29 Aug 2016 03:24:24 +0000 (23:24 -0400)]
Merge branch 'mlx5-series'

Saeed Mahameed says:

====================
Mellanox 100G mlx5 fixes 2016-08-29

This series contains some bug fixes for the mlx5 core and mlx5
ethernet driver.

From Saeed, Fix UMR to consider hardware translation table field
size limitation when calculating the maximum number of MTTs required
by the driver.  Three patches to speed-up netdevice close time by
serializing channel (SQs & RQs) destruction rather than issuing and
waiting for hardware interrupts to free them.

From Eran, Fix ethtool ring parameter reporting for striding RQ layout.
Add error prints on ETS validation failure.

From Kamal, Fix memory leak on error flow.

From Maor, Fix ethtool steering priorities number.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet/mlx5: Increase number of ethtool steering priorities
Maor Gottlieb [Sun, 28 Aug 2016 22:13:50 +0000 (01:13 +0300)]
net/mlx5: Increase number of ethtool steering priorities

Ethtool has 11 flow tables, each flow table has its own priority.
Increase the number of priorities to be aligned with the number of flow
tables.

Fixes: 1174fce8d141 ('net/mlx5e: Support l3/l4 flow type specs in ethtool flow steering')
Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet/mlx5: Add error prints when validate ETS failed
Eran Ben Elisha [Sun, 28 Aug 2016 22:13:49 +0000 (01:13 +0300)]
net/mlx5: Add error prints when validate ETS failed

Upon set ETS failure due to user invalid input, add error prints to
specify the exact error to the user.

Fixes: cdcf11212b22 ('net/mlx5e: Validate BW weight values of ETS')
Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet/mlx5e: Fix memory leak if refreshing TIRs fails
Kamal Heib [Sun, 28 Aug 2016 22:13:48 +0000 (01:13 +0300)]
net/mlx5e: Fix memory leak if refreshing TIRs fails

Free 'in' command object also when mlx5_core_modify_tir fails.

Fixes: 724b2aa15126 ("net/mlx5e: TIRs management refactoring")
Signed-off-by: Kamal Heib <kamalh@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet/mlx5e: Add ethtool counter for TX xmit_more
Tariq Toukan [Sun, 28 Aug 2016 22:13:47 +0000 (01:13 +0300)]
net/mlx5e: Add ethtool counter for TX xmit_more

Add a counter in ethtool for the number of times that
TX xmit_more was used.

Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet/mlx5e: Fix ethtool -g/G rx ring parameter report with striding RQ
Eran Ben Elisha [Sun, 28 Aug 2016 22:13:46 +0000 (01:13 +0300)]
net/mlx5e: Fix ethtool -g/G rx ring parameter report with striding RQ

The driver RQ has two possible configurations: striding RQ and
non-striding RQ.  Until this patch, the driver always reported the
number of hardware WQEs (ring descriptors). For non striding RQ
configuration, this was OK since we have one WQE per pending packet
For striding RQ, multiple packets can fit into one WQE. For better
user experience we normalize the rx_pending parameter (size of wqe/mtu)
as the average ring size in case of striding RQ.

Fixes: 461017cb006a ('net/mlx5e: Support RX multi-packet WQE ...')
Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet/mlx5e: Don't wait for SQ completions on close
Saeed Mahameed [Sun, 28 Aug 2016 22:13:45 +0000 (01:13 +0300)]
net/mlx5e: Don't wait for SQ completions on close

Instead of asking the firmware to flush the SQ (Send Queue) via
asynchronous completions when moved to error, we handle SQ flush
manually (mlx5e_free_tx_descs) same as we did when SQ flush got
timed out or on tx_timeout.

This will reduce SQs flush time and speedup interface down procedure.

Moved mlx5e_free_tx_descs to the end of en_tx.c for tx
critical code locality.

Fixes: 29429f3300a3 ('net/mlx5e: Timeout if SQ doesn't flush during close')
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet/mlx5e: Don't post fragmented MPWQE when RQ is disabled
Saeed Mahameed [Sun, 28 Aug 2016 22:13:44 +0000 (01:13 +0300)]
net/mlx5e: Don't post fragmented MPWQE when RQ is disabled

ICO (Internal control operations) SQ (Send Queue) is closed/disabled
after RQ (Receive Queue).  After RQ is closed an ICO SQ completion
might post a fragmented MPWQE (Multi Packet Work Queue Element) into
that RQ.

As on regular RQ post, check if we are allowed to post to that
RQ (RQ is enabled). Cleanup in-progress UMR MPWQE on mlx5e_free_rx_descs
if needed.

Fixes: bc77b240b3c5 ('net/mlx5e: Add fragmented memory support for RX multi packet WQE')
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet/mlx5e: Don't wait for RQ completions on close
Saeed Mahameed [Sun, 28 Aug 2016 22:13:43 +0000 (01:13 +0300)]
net/mlx5e: Don't wait for RQ completions on close

This will significantly reduce receive queue flush time on interface
down.

Instead of asking the firmware to flush the RQ (Receive Queue) via
asynchronous completions when moved to error, we handle RQ flush
manually (mlx5e_free_rx_descs) same as we did when RQ flush got timed
out.

This will reduce RQs flush time and speedup interface down procedure
(ifconfig down) from 6 sec to 0.3 sec on a 48 cores system.

Moved mlx5e_free_rx_descs en_main.c where it is needed, to keep en_rx.c
free form non critical data path code for better code locality.

Fixes: 6cd392a082de ('net/mlx5e: Handle RQ flush in error cases')
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet/mlx5e: Limit UMR length to the device's limitation
Saeed Mahameed [Sun, 28 Aug 2016 22:13:42 +0000 (01:13 +0300)]
net/mlx5e: Limit UMR length to the device's limitation

ConnectX-4 UMR (User Memory Region) MTT translation table offset in WQE
is limited to U16_MAX, before this patch we ignored that limitation and
requested the maximum possible UMR translation length that the netdev
might need (MAX channels * MAX pages per channel).
In case of a system with #cores > 32 and when linear WQE allocation fails,
falling back to using UMR WQEs will cause the RQ (Receive Queue) to get
stuck.

Here we limit UMR length to min(U16_MAX, max required pages) (while
considering the required alignments) on driver load, by default U16_MAX is
sufficient since the default RX rings value guarantees that we are in
range, dynamically (on set_ringparam/set_channels) we will check if the
new required UMR length (num mtts) is still in range, if not, fail the
request.

Fixes: bc77b240b3c5 ('net/mlx5e: Add fragmented memory support for RX multi packet WQE')
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agopowerpc: signals: Discard transaction state from signal frames
Cyril Bur [Tue, 23 Aug 2016 00:46:17 +0000 (10:46 +1000)]
powerpc: signals: Discard transaction state from signal frames

Userspace can begin and suspend a transaction within the signal
handler which means they might enter sys_rt_sigreturn() with the
processor in suspended state.

sys_rt_sigreturn() wants to restore process context (which may have
been in a transaction before signal delivery). To do this it must
restore TM SPRS. To achieve this, any transaction initiated within the
signal frame must be discarded in order to be able to restore TM SPRs
as TM SPRs can only be manipulated non-transactionally..
>From the PowerPC ISA:
  TM Bad Thing Exception [Category: Transactional Memory]
   An attempt is made to execute a mtspr targeting a TM register in
   other than Non-transactional state.

Not doing so results in a TM Bad Thing:
[12045.221359] Kernel BUG at c000000000050a40 [verbose debug info unavailable]
[12045.221470] Unexpected TM Bad Thing exception at c000000000050a40 (msr 0x201033)
[12045.221540] Oops: Unrecoverable exception, sig: 6 [#1]
[12045.221586] SMP NR_CPUS=2048 NUMA PowerNV
[12045.221634] Modules linked in: xt_CHECKSUM iptable_mangle ipt_MASQUERADE
 nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4
 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp bridge stp llc ebtable_filter
 ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables kvm_hv kvm
 uio_pdrv_genirq ipmi_powernv uio powernv_rng ipmi_msghandler autofs4 ses enclosure
 scsi_transport_sas bnx2x ipr mdio libcrc32c
[12045.222167] CPU: 68 PID: 6178 Comm: sigreturnpanic Not tainted 4.7.0 #34
[12045.222224] task: c0000000fce38600 ti: c0000000fceb4000 task.ti: c0000000fceb4000
[12045.222293] NIP: c000000000050a40 LR: c0000000000163bc CTR: 0000000000000000
[12045.222361] REGS: c0000000fceb7ac0 TRAP: 0700   Not tainted (4.7.0)
[12045.222418] MSR: 9000000300201033 <SF,HV,ME,IR,DR,RI,LE,TM[SE]> CR: 28444280  XER: 20000000
[12045.222625] CFAR: c0000000000163b8 SOFTE: 0 PACATMSCRATCH: 900000014280f033
GPR00: 01100000b8000001 c0000000fceb7d40 c00000000139c100 c0000000fce390d0
GPR04: 900000034280f033 0000000000000000 0000000000000000 0000000000000000
GPR08: 0000000000000000 b000000000001033 0000000000000001 0000000000000000
GPR12: 0000000000000000 c000000002926400 0000000000000000 0000000000000000
GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
GPR20: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
GPR24: 0000000000000000 00003ffff98cadd0 00003ffff98cb470 0000000000000000
GPR28: 900000034280f033 c0000000fceb7ea0 0000000000000001 c0000000fce390d0
[12045.223535] NIP [c000000000050a40] tm_restore_sprs+0xc/0x1c
[12045.223584] LR [c0000000000163bc] tm_recheckpoint+0x5c/0xa0
[12045.223630] Call Trace:
[12045.223655] [c0000000fceb7d80] [c000000000026e74] sys_rt_sigreturn+0x494/0x6c0
[12045.223738] [c0000000fceb7e30] [c0000000000092e0] system_call+0x38/0x108
[12045.223806] Instruction dump:
[12045.223841] 7c800164 4e800020 7c0022a6 f80304a8 7c0222a6 f80304b0 7c0122a6 f80304b8
[12045.223955] 4e800020 e80304a8 7c0023a6 e80304b0 <7c0223a6e80304b8 7c0123a6 4e800020
[12045.224074] ---[ end trace cb8002ee240bae76 ]---

It isn't clear exactly if there is really a use case for userspace
returning with a suspended transaction, however, doing so doesn't (on
its own) constitute a bad frame. As such, this patch simply discards
the transactional state of the context calling the sigreturn and
continues.

Reported-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Signed-off-by: Cyril Bur <cyrilbur@gmail.com>
Tested-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Reviewed-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Acked-by: Simon Guo <wei.guo.simon@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc/powernv : Drop reference added by kset_find_obj()
Mukesh Ojha [Mon, 22 Aug 2016 06:47:44 +0000 (12:17 +0530)]
powerpc/powernv : Drop reference added by kset_find_obj()

In a situation, where Linux kernel gets notified about duplicate error log
from OPAL, it is been observed that kernel fails to remove sysfs entries
(/sys/firmware/opal/elog/0xXXXXXXXX) of such error logs. This is because,
we currently search the error log/dump kobject in the kset list via
'kset_find_obj()' routine. Which eventually increment the reference count
by one, once it founds the kobject.

So, unless we decrement the reference count by one after it found the kobject,
we would not be able to release the kobject properly later.

This patch adds the 'kobject_put()' which was missing earlier.

Signed-off-by: Mukesh Ojha <mukesh02@linux.vnet.ibm.com>
Cc: stable@vger.kernel.org
Reviewed-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agopowerpc/tm: do not use r13 for tabort_syscall
Nicholas Piggin [Mon, 25 Jul 2016 04:26:51 +0000 (14:26 +1000)]
powerpc/tm: do not use r13 for tabort_syscall

tabort_syscall runs with RI=1, so a nested recoverable machine
check will load the paca into r13 and overwrite what we loaded
it with, because exceptions returning to privileged mode do not
restore r13.

Fixes: b4b56f9ecab4 (powerpc/tm: Abort syscalls in active transactions)
Cc: stable@vger.kernel.org
Signed-off-by: Nick Piggin <npiggin@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
8 years agoLinux 4.8-rc4
Linus Torvalds [Sun, 28 Aug 2016 22:04:33 +0000 (15:04 -0700)]
Linux 4.8-rc4

8 years agoMerge tag 'drm-fixes-for-4.8-rc4' of git://people.freedesktop.org/~airlied/linux
Linus Torvalds [Sun, 28 Aug 2016 21:31:36 +0000 (14:31 -0700)]
Merge tag 'drm-fixes-for-4.8-rc4' of git://people.freedesktop.org/~airlied/linux

Pull drm fixes from Dave Airlie:
 "A bunch of fixes covering i915, amdgpu, one tegra and some core DRM
  ones.  Nothing too strange at this point"

* tag 'drm-fixes-for-4.8-rc4' of git://people.freedesktop.org/~airlied/linux: (21 commits)
  drm/atomic: Don't potentially reset color_mgmt_changed on successive property updates.
  drm: Protect fb_defio in drivers with CONFIG_KMS_FBDEV_EMULATION
  drm/amdgpu: skip TV/CV in display parsing
  drm/amdgpu: avoid a possible array overflow
  drm/amdgpu: fix lru size grouping v2
  drm/tegra: dsi: Enhance runtime power management
  drm/i915: Fix botched merge that downgrades CSR versions.
  drm/i915/skl: Ensure pipes with changed wms get added to the state
  drm/i915/gen9: Only copy WM results for changed pipes to skl_hw
  drm/i915/skl: Add support for the SAGV, fix underrun hangs
  drm/i915/gen6+: Interpret mailbox error flags
  drm/i915: Reattach comment, complete type specification
  drm/i915: Unconditionally flush any chipset buffers before execbuf
  drm/i915/gen9: Drop invalid WARN() during data rate calculation
  drm/i915/gen9: Initialize intel_state->active_crtcs during WM sanitization (v2)
  drm: Reject page_flip for !DRIVER_MODESET
  drm/amdgpu: fix timeout value check in amd_sched_job_recovery
  drm/amdgpu: fix sdma_v2_4_ring_test_ib
  drm/amdgpu: fix amdgpu_move_blit on 32bit systems
  drm/radeon: fix radeon_move_blit on 32bit systems
  ...

8 years agodrm/atomic: Don't potentially reset color_mgmt_changed on successive property updates.
Mario Kleiner [Fri, 26 Aug 2016 23:02:28 +0000 (01:02 +0200)]
drm/atomic: Don't potentially reset color_mgmt_changed on successive property updates.

Due to assigning the 'replaced' value instead of or'ing it,
if drm_atomic_crtc_set_property() gets called multiple times,
the last call will define the color_mgmt_changed flag, so
a non-updating call to a property can reset the flag and
prevent actual hw state updates required by preceding
property updates.

Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: <stable@vger.kernel.org> # v4.6+
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
8 years agoNFSv4.1: Remove obsolete and incorrrect assignment in nfs4_callback_sequence
Trond Myklebust [Sun, 28 Aug 2016 16:19:04 +0000 (12:19 -0400)]
NFSv4.1: Remove obsolete and incorrrect assignment in nfs4_callback_sequence

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agoNFSv4.1: Close callback races for OPEN, LAYOUTGET and LAYOUTRETURN
Trond Myklebust [Sun, 28 Aug 2016 15:50:26 +0000 (11:50 -0400)]
NFSv4.1: Close callback races for OPEN, LAYOUTGET and LAYOUTRETURN

Defer freeing the slot until after we have processed the results from
OPEN and LAYOUTGET. This means that the server can rely on the
mechanism in RFC5661 Section 2.10.6.3 to ensure that replies to an
OPEN or LAYOUTGET/RETURN RPC call don't race with the callbacks that
apply to them.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agoNFSv4.1: Defer bumping the slot sequence number until we free the slot
Trond Myklebust [Sun, 28 Aug 2016 14:28:25 +0000 (10:28 -0400)]
NFSv4.1: Defer bumping the slot sequence number until we free the slot

For operations like OPEN or LAYOUTGET, which return recallable state
(i.e. delegations and layouts) we want to enable the mechanism for
resolving recall races in RFC5661 Section 2.10.6.3.
To do so, we will want to defer bumping the slot's sequence number until
we have finished processing the RPC results.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agoNFSv4.1: Delay callback processing when there are referring triples
Trond Myklebust [Sun, 28 Aug 2016 17:25:43 +0000 (13:25 -0400)]
NFSv4.1: Delay callback processing when there are referring triples

If CB_SEQUENCE tells us that the processing of this request depends on
the completion of one or more referring triples (see RFC 5661 Section
2.10.6.3), delay the callback processing until after the RPC requests
being referred to have completed.
If we end up delaying for more than 1/2 second, then fall back to
returning NFS4ERR_DELAY in reply to the callback.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
8 years agoNFSv4.1: Fix Oopsable condition in server callback races
Trond Myklebust [Sun, 28 Aug 2016 03:44:04 +0000 (23:44 -0400)]
NFSv4.1: Fix Oopsable condition in server callback races

The slot table hasn't been an array since v3.7. Ensure that we
use nfs4_lookup_slot() to access the slot correctly.

Fixes: 87dda67e7386 ("NFSv4.1: Allow SEQUENCE to resize the slot table...")
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Cc: stable@vger.kernel.org # v3.8+
8 years agoMerge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 28 Aug 2016 17:02:23 +0000 (10:02 -0700)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull perf fixes from Thomas Gleixner:
 "A few fixes from the perf departement

   - prevent a imbalanced preemption disable in the events teardown code
   - prevent out of bound acces in perf userspace
   - make perf tools compile with UCLIBC again
   - a fix for the userspace unwinder utility"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/core: Use this_cpu_ptr() when stopping AUX events
  perf evsel: Do not access outside hw cache name arrays
  tools lib: Reinstate strlcpy() header guard with __UCLIBC__
  perf unwind: Use addr_location::addr instead of ip for entries

8 years agoMerge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 28 Aug 2016 17:00:21 +0000 (10:00 -0700)]
Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull x86 fix from Thomas Gleixner:
 "A single bugfix to prevent irq remapping when the ioapic is disabled"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/apic: Do not init irq remapping if ioapic is disabled

8 years agoMerge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 28 Aug 2016 16:52:40 +0000 (09:52 -0700)]
Merge branch 'irq-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull irq fixes from Thomas Gleixner:
 "This lot provides:

   - plug a hotplug race in the new affinity infrastructure
   - a fix for the trigger type of chained interrupts
   - plug a potential memory leak in the core code
   - a few fixes for ARM and MIPS GICs"

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irqchip/mips-gic: Implement activate op for device domain
  irqchip/mips-gic: Cleanup chip and handler setup
  genirq/affinity: Use get/put_online_cpus around cpumask operations
  genirq: Fix potential memleak when failing to get irq pm
  irqchip/gicv3-its: Disable the ITS before initializing it
  irqchip/gicv3: Remove disabling redistributor and group1 non-secure interrupts
  irqchip/gic: Allow self-SGIs for SMP on UP configurations
  genirq: Correctly configure the trigger on chained interrupts

8 years agoMerge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 28 Aug 2016 16:03:05 +0000 (09:03 -0700)]
Merge branch 'timers-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull timer fixes from Thomas Gleixner:
 "A few updates for timers & co:

   - prevent a livelock in the timekeeping code when debugging is
     enabled

   - prevent out of bounds access in the timekeeping debug code

   - various fixes in clocksource drivers

   - a new maintainers entry"

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  clocksource/drivers/sun4i: Clear interrupts after stopping timer in probe function
  drivers/clocksource/pistachio: Fix memory corruption in init
  clocksource/drivers/timer-atmel-pit: Enable mck clock
  clocksource/drivers/pxa: Fix include files for compilation
  MAINTAINERS: Add ARM ARCHITECTED TIMER entry
  timekeeping: Cap array access in timekeeping_debug
  timekeeping: Avoid taking lock in NMI path with CONFIG_DEBUG_TIMEKEEPING

8 years agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Linus Torvalds [Sat, 27 Aug 2016 22:51:50 +0000 (15:51 -0700)]
Merge tag 'for-linus' of git://git./virt/kvm/kvm

Pull KVM fixes from Paolo Bonzini:
 "ARM:
   - fixes for ITS init issues, error handling, IRQ leakage, race
     conditions
   - an erratum workaround for timers
   - some removal of misleading use of errors and comments
   - a fix for GICv3 on 32-bit guests

  MIPS:
   - fix for where the guest could wrongly map the first page of
     physical memory

  x86:
   - nested virtualization fixes"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  MIPS: KVM: Check for pfn noslot case
  kvm: nVMX: fix nested tsc scaling
  KVM: nVMX: postpone VMCS changes on MSR_IA32_APICBASE write
  KVM: nVMX: fix msr bitmaps to prevent L2 from accessing L0 x2APIC
  arm64: KVM: report configured SRE value to 32-bit world
  arm64: KVM: remove misleading comment on pmu status
  KVM: arm/arm64: timer: Workaround misconfigured timer interrupt
  arm64: Document workaround for Cortex-A72 erratum #853709
  KVM: arm/arm64: Change misleading use of is_error_pfn
  KVM: arm64: ITS: avoid re-mapping LPIs
  KVM: arm64: check for ITS device on MSI injection
  KVM: arm64: ITS: move ITS registration into first VCPU run
  KVM: arm64: vgic-its: Make updates to propbaser/pendbaser atomic
  KVM: arm64: vgic-its: Plug race in vgic_put_irq
  KVM: arm64: vgic-its: Handle errors from vgic_add_lpi
  KVM: arm64: ITS: return 1 on successful MSI injection

8 years agoMerge branch 'akpm' (patches from Andrew)
Linus Torvalds [Sat, 27 Aug 2016 06:12:12 +0000 (23:12 -0700)]
Merge branch 'akpm' (patches from Andrew)

Merge fixes from Andrew Morton:
 "11 fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  mm: silently skip readahead for DAX inodes
  dax: fix device-dax region base
  fs/seq_file: fix out-of-bounds read
  mm: memcontrol: avoid unused function warning
  mm: clarify COMPACTION Kconfig text
  treewide: replace config_enabled() with IS_ENABLED() (2nd round)
  printk: fix parsing of "brl=" option
  soft_dirty: fix soft_dirty during THP split
  sysctl: handle error writing UINT_MAX to u32 fields
  get_maintainer: quiet noisy implicit -f vcs_file_exists checking
  byteswap: don't use __builtin_bswap*() with sparse

8 years agoMerge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Linus Torvalds [Sat, 27 Aug 2016 06:05:19 +0000 (23:05 -0700)]
Merge tag 'arm64-fixes' of git://git./linux/kernel/git/arm64/linux

Pull ARM64 fix from Catalin Marinas:
 "ARM64 fix to avoid potential TLB conflict when CONFIG_RANDOMIZE_BASE
  is enabled"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: avoid TLB conflict with CONFIG_RANDOMIZE_BASE

8 years agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma
Linus Torvalds [Sat, 27 Aug 2016 06:01:09 +0000 (23:01 -0700)]
Merge tag 'for-linus' of git://git./linux/kernel/git/dledford/rdma

Pull rdma fixes from Doug Ledford:
 "Round one of 4.8 rc fixes.

  This should be the bulk of the -rc fixes for 4.8.  I only have a few
  things that are still outstanding (two ipoib bugs for which the
  solution is not yet fully known, and a few queued items that came in
  after my last push and I didn't want to delay this pull request for
  late comers again).

  Even though the patch count is kind of high, everything is minor fixes
  so the overall churn is pretty low.

  Summary:

   - minor fixes to cxgb4
   - minor fixes to mlx4
   - one minor fix each to core, rxe, isert, srpt, mlx5, ocrdma, and usnic
   - six or so fixes to i40iw fixes
   - the rest are hfi1 fixes"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: (34 commits)
  i40iw: Send last streaming mode message for loopback connections
  IB/srpt: Update sport->port_guid with each port refresh
  RDMA/ocrdma: Fix the max_sge reported from FW
  i40iw: Avoid writing to freed memory
  i40iw: Fix double free of allocated_buffer
  IB/mlx5: Remove superfluous include of io-mapping.h
  i40iw: Do not set self-referencing pointer to NULL after kfree
  i40iw: Add missing NULL check for MPA private data
  iw_cxgb4: Fix cxgb4 arm CQ logic w/IB_CQ_REPORT_MISSED_EVENTS
  i40iw: Add missing check for interface already open
  i40iw: Protect req_resource_num update
  i40iw: Change mem_resources pointer to a u8
  IB/core: Use memdup_user() rather than duplicating its implementation
  IB/qib: Use memdup_user() rather than duplicating its implementation
  iw_cxgb4: use the MPA initiator's IRD if < our ORD
  iw_cxgb4: limit IRD/ORD advertised to ULP by device max.
  IB/hfi1: Fix mm_struct use after free
  IB/rdmvat: Fix double vfree() in rvt_create_qp() error path
  IB/hfi1: Improve J_KEY generation
  IB/hfi1: Return invalid field for non-QSFP CableInfo queries
  ...

8 years agoMerge tag 'sound-4.8-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai...
Linus Torvalds [Sat, 27 Aug 2016 05:53:21 +0000 (22:53 -0700)]
Merge tag 'sound-4.8-rc4' of git://git./linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "Here are a bunch of fixes as you can see in diffstat.

  One core change in ASoC is about the unexpected unbinding error, and
  another about debugfs cleanup.

  The rest are wide-spread driver-specific fixes: a series of LINE6 USB
  fixes, a HD-audio quirk, and various ASoC fixes including OMAP boot
  fixes and Intel SKL fixes"

* tag 'sound-4.8-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (22 commits)
  ALSA: hda/realtek - fix headset mic detection for MSI MS-B120
  ASoC: omap-mcpdm: Fix irq resource handling
  ASoC: max98371: Add terminate entry for i2c_device_id tables
  ALSA: line6: Fix POD sysfs attributes segfault
  ALSA: line6: Give up on the lock while URBs are released.
  ALSA: line6: Remove double line6_pcm_release() after failed acquire.
  ASoC: omap-abe-twl6040: Correct dmic-codec device registration
  ASoC: core: Clean up DAPM before the card debugfs
  ASoC: omap-mcpdm: Drop pdmclk clock handling
  ASoC: atmel_ssc_dai: Don't unconditionally reset SSC on stream startup
  ASoC: compress: Fix leak of a widget list in soc_compr_open_fe
  ASoC: Intel: Skylake: Fix error return code in skl_probe()
  ASoC: wm2000: Fix return of uninitialised varible
  ASoC: Fix leak of rtd in soc_bind_dai_link
  ASoC: da7213: Default to 64 BCLKs per WCLK to support all formats
  ASoC: nau8825: fix static check error about semaphone control
  ASoC: nau8825: fix bug in playback when suspend
  ASoC: samsung: Fix clock handling in S3C24XX_UDA134X card
  ASoC: simple-card-utils: add missing MODULE_xxx()
  ASoC: Intel: Skylake: Check list empty while getting module info
  ...

8 years agorhashtable: fix a memory leak in alloc_bucket_locks()
Eric Dumazet [Fri, 26 Aug 2016 15:51:39 +0000 (08:51 -0700)]
rhashtable: fix a memory leak in alloc_bucket_locks()

If vmalloc() was successful, do not attempt a kmalloc_array()

Fixes: 4cf0b354d92e ("rhashtable: avoid large lock-array allocations")
Reported-by: CAI Qian <caiqian@redhat.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Florian Westphal <fw@strlen.de>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Tested-by: CAI Qian <caiqian@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agosfc: fix potential stack corruption from running past stat bitmask
Andrew Rybchenko [Fri, 26 Aug 2016 10:19:34 +0000 (11:19 +0100)]
sfc: fix potential stack corruption from running past stat bitmask

On 32-bit systems, mask is only an array of 3 longs, not 4, so don't try
to write to mask[3].
Also include build-time checks in case the size of the bitmask changes.

Fixes: 3c36a2aded8c ("sfc: display vadaptor statistics for all interfaces")
Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetoot...
David S. Miller [Sat, 27 Aug 2016 04:09:17 +0000 (21:09 -0700)]
Merge branch 'for-upstream' of git://git./linux/kernel/git/bluetooth/bluetooth

Johan Hedberg says:

====================
pull request: bluetooth 2016-08-25

Here are a couple of important Bluetooth fixes for the 4.8 kernel:

 - Memory leak fix for HCI requests
 - Fix sk_filter handling with L2CAP
 - Fix sock_recvmsg behavior when MSG_TRUNC is not set

Please let me know if there are any issues pulling. Thanks.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'for-linus-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mason...
Linus Torvalds [Sat, 27 Aug 2016 03:22:01 +0000 (20:22 -0700)]
Merge branch 'for-linus-4.8' of git://git./linux/kernel/git/mason/linux-btrfs

Pull btrfs fixes from Chris Mason:
 "We've queued up a few different fixes in here.  These range from
  enospc corners to fsync and quota fixes, and a few targeted at error
  handling for corrupt metadata/fuzzing"

* 'for-linus-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
  Btrfs: fix lockdep warning on deadlock against an inode's log mutex
  Btrfs: detect corruption when non-root leaf has zero item
  Btrfs: check btree node's nritems
  btrfs: don't create or leak aliased root while cleaning up orphans
  Btrfs: fix em leak in find_first_block_group
  btrfs: do not background blkdev_put()
  Btrfs: clarify do_chunk_alloc()'s return value
  btrfs: fix fsfreeze hang caused by delayed iputs deal
  btrfs: update btrfs_space_info's bytes_may_use timely
  btrfs: divide btrfs_update_reserved_bytes() into two functions
  btrfs: use correct offset for reloc_inode in prealloc_file_extent_cluster()
  btrfs: qgroup: Fix qgroup incorrectness caused by log replay
  btrfs: relocation: Fix leaking qgroups numbers on data extents
  btrfs: qgroup: Refactor btrfs_qgroup_insert_dirty_extent()
  btrfs: waiting on qgroup rescan should not always be interruptible
  btrfs: properly track when rescan worker is running
  btrfs: flush_space: treat return value of do_chunk_alloc properly
  Btrfs: add ASSERT for block group's memory leak
  btrfs: backref: Fix soft lockup in __merge_refs function
  Btrfs: fix memory leak of reloc_root

8 years agoMerge tag 'dlm-4.8-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland...
Linus Torvalds [Sat, 27 Aug 2016 03:18:49 +0000 (20:18 -0700)]
Merge tag 'dlm-4.8-fixes' of git://git./linux/kernel/git/teigland/linux-dlm

Pull dlm fix from David Teigland:
 "This fixes a bug introduced by recent debugfs cleanup"

* tag 'dlm-4.8-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm:
  dlm: fix malfunction of dlm_tool caused by debugfs changes

8 years agoMerge tag 'dm-4.8-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/device...
Linus Torvalds [Sat, 27 Aug 2016 03:15:32 +0000 (20:15 -0700)]
Merge tag 'dm-4.8-fixes-3' of git://git./linux/kernel/git/device-mapper/linux-dm

Pull device mapper fixes from Mike Snitzer:

 - another stable fix for DM flakey (that tweaks the previous fix that
   didn't factor in expected 'drop_writes' behavior for read IO).

 - a dm-log bio operation flags fix for the broader block changes that
   were merged during the 4.8 merge window.

* tag 'dm-4.8-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
  dm log: fix unitialized bio operation flags
  dm flakey: fix reads to be issued if drop_writes configured

8 years agoMerge tag 'iommu-fixes-v4.8-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sat, 27 Aug 2016 03:12:35 +0000 (20:12 -0700)]
Merge tag 'iommu-fixes-v4.8-rc3' of git://git./linux/kernel/git/joro/iommu

Pull IOMMU fixes from Joerg Roedel:
 "Fixes from Will Deacon:

   - fix a couple of thinkos in the CMDQ error handling and
     short-descriptor page table code that have been there since day one

   - disable stalling faults, since they may result in hardware deadlock

   - fix an accidental BUG() when passing disable_bypass=1 on the
     cmdline"

* tag 'iommu-fixes-v4.8-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
  iommu/arm-smmu: Don't BUG() if we find aborting STEs with disable_bypass
  iommu/arm-smmu: Disable stalling faults for all endpoints
  iommu/arm-smmu: Fix CMDQ error handling
  iommu/io-pgtable-arm-v7s: Fix attributes when splitting blocks

8 years agoMerge branch 'for-linus' of git://git.kernel.dk/linux-block
Linus Torvalds [Sat, 27 Aug 2016 01:50:07 +0000 (18:50 -0700)]
Merge branch 'for-linus' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:
 "Here's a set of block fixes for the current 4.8-rc release.  This
  contains:

   - a fix for a secure erase regression, from Adrian.

   - a fix for an mmc use-after-free bug regression, also from Adrian.

   - potential zero pointer deference in bdev freezing, from Andrey.

   - a race fix for blk_set_queue_dying() from Bart.

   - a set of xen blkfront fixes from Bob Liu.

   - three small fixes for bcache, from Eric and Kent.

   - a fix for a potential invalid NVMe state transition, from Gabriel.

   - blk-mq CPU offline fix, preventing us from issuing and completing a
     request on the wrong queue.  From me.

   - revert two previous floppy changes, since they caused a user
     visibile regression.  A better fix is in the works.

   - ensure that we don't send down bios that have more than 256
     elements in them.  Fixes a crash with bcache, for example.  From
     Ming.

   - a fix for deferencing an error pointer with cgroup writeback.
     Fixes a regression.  From Vegard"

* 'for-linus' of git://git.kernel.dk/linux-block:
  mmc: fix use-after-free of struct request
  Revert "floppy: refactor open() flags handling"
  Revert "floppy: fix open(O_ACCMODE) for ioctl-only open"
  fs/block_dev: fix potential NULL ptr deref in freeze_bdev()
  blk-mq: improve warning for running a queue on the wrong CPU
  blk-mq: don't overwrite rq->mq_ctx
  block: make sure a big bio is split into at most 256 bvecs
  nvme: Fix nvme_get/set_features() with a NULL result pointer
  bdev: fix NULL pointer dereference
  xen-blkfront: free resources if xlvbd_alloc_gendisk fails
  xen-blkfront: introduce blkif_set_queue_limits()
  xen-blkfront: fix places not updated after introducing 64KB page granularity
  bcache: pr_err: more meaningful error message when nr_stripes is invalid
  bcache: RESERVE_PRIO is too small by one when prio_buckets() is a power of two.
  bcache: register_bcache(): call blkdev_put() when cache_alloc() fails
  block: Fix race triggered by blk_set_queue_dying()
  block: Fix secure erase
  nvme: Prevent controller state invalid transition

8 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Linus Torvalds [Sat, 27 Aug 2016 01:36:23 +0000 (18:36 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/dtor/input

Pull input subsystem fixes from Dmitry Torokhov:
 "Simply small driver fixups"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: ads7846 - remove redundant regulator_disable call
  Input: synaptics-rmi4 - fix register descriptor subpacket map construction
  Input: tegra-kbc - fix inverted reset logic
  Input: silead - use devm_gpiod_get
  Input: i8042 - set up shared ps2_cmd_mutex for AUX ports

8 years agoMerge tag 'pci-v4.8-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Linus Torvalds [Sat, 27 Aug 2016 01:26:07 +0000 (18:26 -0700)]
Merge tag 'pci-v4.8-fixes-1' of git://git./linux/kernel/git/helgaas/pci

Pull PCI fixes from Bjorn Helgaas:
 "Resource management:
   - Update "pci=resource_alignment" documentation (Mathias Koehrer)

  MSI:
   - Use positive flags in pci_alloc_irq_vectors() (Christoph Hellwig)
   - Call pci_intx() when using legacy interrupts in pci_alloc_irq_vectors() (Christoph Hellwig)

  Intel VMD host bridge driver:
   - Fix infinite loop executing irq's (Keith Busch)"

* tag 'pci-v4.8-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  x86/PCI: VMD: Fix infinite loop executing irq's
  PCI: Call pci_intx() when using legacy interrupts in pci_alloc_irq_vectors()
  PCI: Use positive flags in pci_alloc_irq_vectors()
  PCI: Update "pci=resource_alignment" documentation

8 years agomm: silently skip readahead for DAX inodes
Ross Zwisler [Thu, 25 Aug 2016 22:17:17 +0000 (15:17 -0700)]
mm: silently skip readahead for DAX inodes

For DAX inodes we need to be careful to never have page cache pages in
the mapping->page_tree.  This radix tree should be composed only of DAX
exceptional entries and zero pages.

ltp's readahead02 test was triggering a warning because we were trying
to insert a DAX exceptional entry but found that a page cache page had
already been inserted into the tree.  This page was being inserted into
the radix tree in response to a readahead(2) call.

Readahead doesn't make sense for DAX inodes, but we don't want it to
report a failure either.  Instead, we just return success and don't do
any work.

Link: http://lkml.kernel.org/r/20160824221429.21158-1-ross.zwisler@linux.intel.com
Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Reported-by: Jeff Moyer <jmoyer@redhat.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Jan Kara <jack@suse.com>
Cc: <stable@vger.kernel.org> [4.5+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agodax: fix device-dax region base
Dan Williams [Thu, 25 Aug 2016 22:17:14 +0000 (15:17 -0700)]
dax: fix device-dax region base

The data offset for a dax region needs to account for a reservation in
the resource range.  Otherwise, device-dax is allowing mappings directly
into the memmap or device-info-block area with crash signatures like the
following:

 BUG: unable to handle kernel NULL pointer dereference at 0000000000000008
 IP: get_zone_device_page+0x11/0x30
 Call Trace:
   follow_devmap_pmd+0x298/0x2c0
   follow_page_mask+0x275/0x530
   __get_user_pages+0xe3/0x750
   __gfn_to_pfn_memslot+0x1b2/0x450 [kvm]
   tdp_page_fault+0x130/0x280 [kvm]
   kvm_mmu_page_fault+0x5f/0xf0 [kvm]
   handle_ept_violation+0x94/0x180 [kvm_intel]
   vmx_handle_exit+0x1d3/0x1440 [kvm_intel]
   kvm_arch_vcpu_ioctl_run+0x81d/0x16a0 [kvm]
   kvm_vcpu_ioctl+0x33c/0x620 [kvm]
   do_vfs_ioctl+0xa2/0x5d0
   SyS_ioctl+0x79/0x90
   entry_SYSCALL_64_fastpath+0x1a/0xa4

Fixes: ab68f2622136 ("/dev/dax, pmem: direct access to persistent memory")
Link: http://lkml.kernel.org/r/147205536732.1606.8994275381938837346.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Reported-by: Abhilash Kumar Mulumudi <m.abhilash-kumar@hpe.com>
Reported-by: Toshi Kani <toshi.kani@hpe.com>
Tested-by: Toshi Kani <toshi.kani@hpe.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agofs/seq_file: fix out-of-bounds read
Vegard Nossum [Thu, 25 Aug 2016 22:17:11 +0000 (15:17 -0700)]
fs/seq_file: fix out-of-bounds read

seq_read() is a nasty piece of work, not to mention buggy.

It has (I think) an old bug which allows unprivileged userspace to read
beyond the end of m->buf.

I was getting these:

    BUG: KASAN: slab-out-of-bounds in seq_read+0xcd2/0x1480 at addr ffff880116889880
    Read of size 2713 by task trinity-c2/1329
    CPU: 2 PID: 1329 Comm: trinity-c2 Not tainted 4.8.0-rc1+ #96
    Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.9.3-0-ge2fc41e-prebuilt.qemu-project.org 04/01/2014
    Call Trace:
      kasan_object_err+0x1c/0x80
      kasan_report_error+0x2cb/0x7e0
      kasan_report+0x4e/0x80
      check_memory_region+0x13e/0x1a0
      kasan_check_read+0x11/0x20
      seq_read+0xcd2/0x1480
      proc_reg_read+0x10b/0x260
      do_loop_readv_writev.part.5+0x140/0x2c0
      do_readv_writev+0x589/0x860
      vfs_readv+0x7b/0xd0
      do_readv+0xd8/0x2c0
      SyS_readv+0xb/0x10
      do_syscall_64+0x1b3/0x4b0
      entry_SYSCALL64_slow_path+0x25/0x25
    Object at ffff880116889100, in cache kmalloc-4096 size: 4096
    Allocated:
    PID = 1329
      save_stack_trace+0x26/0x80
      save_stack+0x46/0xd0
      kasan_kmalloc+0xad/0xe0
      __kmalloc+0x1aa/0x4a0
      seq_buf_alloc+0x35/0x40
      seq_read+0x7d8/0x1480
      proc_reg_read+0x10b/0x260
      do_loop_readv_writev.part.5+0x140/0x2c0
      do_readv_writev+0x589/0x860
      vfs_readv+0x7b/0xd0
      do_readv+0xd8/0x2c0
      SyS_readv+0xb/0x10
      do_syscall_64+0x1b3/0x4b0
      return_from_SYSCALL_64+0x0/0x6a
    Freed:
    PID = 0
    (stack is not available)
    Memory state around the buggy address:
     ffff88011688a000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
     ffff88011688a080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    >ffff88011688a100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
       ^
     ffff88011688a180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
     ffff88011688a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
    ==================================================================
    Disabling lock debugging due to kernel taint

This seems to be the same thing that Dave Jones was seeing here:

  https://lkml.org/lkml/2016/8/12/334

There are multiple issues here:

  1) If we enter the function with a non-empty buffer, there is an attempt
     to flush it. But it was not clearing m->from after doing so, which
     means that if we try to do this flush twice in a row without any call
     to traverse() in between, we are going to be reading from the wrong
     place -- the splat above, fixed by this patch.

  2) If there's a short write to userspace because of page faults, the
     buffer may already contain multiple lines (i.e. pos has advanced by
     more than 1), but we don't save the progress that was made so the
     next call will output what we've already returned previously. Since
     that is a much less serious issue (and I have a headache after
     staring at seq_read() for the past 8 hours), I'll leave that for now.

Link: http://lkml.kernel.org/r/1471447270-32093-1-git-send-email-vegard.nossum@oracle.com
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
Reported-by: Dave Jones <davej@codemonkey.org.uk>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agomm: memcontrol: avoid unused function warning
Arnd Bergmann [Thu, 25 Aug 2016 22:17:08 +0000 (15:17 -0700)]
mm: memcontrol: avoid unused function warning

A bugfix in v4.8-rc2 introduced a harmless warning when
CONFIG_MEMCG_SWAP is disabled but CONFIG_MEMCG is enabled:

  mm/memcontrol.c:4085:27: error: 'mem_cgroup_id_get_online' defined but not used [-Werror=unused-function]
   static struct mem_cgroup *mem_cgroup_id_get_online(struct mem_cgroup *memcg)

This moves the function inside of the #ifdef block that hides the
calling function, to avoid the warning.

Fixes: 1f47b61fb407 ("mm: memcontrol: fix swap counter leak on swapout from offline cgroup")
Link: http://lkml.kernel.org/r/20160824113733.2776701-1-arnd@arndb.de
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Vladimir Davydov <vdavydov@virtuozzo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agomm: clarify COMPACTION Kconfig text
Michal Hocko [Thu, 25 Aug 2016 22:17:05 +0000 (15:17 -0700)]
mm: clarify COMPACTION Kconfig text

The current wording of the COMPACTION Kconfig help text doesn't
emphasise that disabling COMPACTION might cripple the page allocator
which relies on the compaction quite heavily for high order requests and
an unexpected OOM can happen with the lack of compaction.  Make sure we
are vocal about that.

Link: http://lkml.kernel.org/r/20160823091726.GK23577@dhcp22.suse.cz
Signed-off-by: Michal Hocko <mhocko@suse.com>
Cc: Markus Trippelsdorf <markus@trippelsdorf.de>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Joonsoo Kim <js1304@gmail.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agotreewide: replace config_enabled() with IS_ENABLED() (2nd round)
Masahiro Yamada [Thu, 25 Aug 2016 22:17:02 +0000 (15:17 -0700)]
treewide: replace config_enabled() with IS_ENABLED() (2nd round)

Commit 97f2645f358b ("tree-wide: replace config_enabled() with
IS_ENABLED()") mostly killed config_enabled(), but some new users have
appeared for v4.8-rc1.  They are all used for a boolean option, so can
be replaced with IS_ENABLED() safely.

Link: http://lkml.kernel.org/r/1471970749-24867-1-git-send-email-yamada.masahiro@socionext.com
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Kees Cook <keescook@chromium.org>
Acked-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agoprintk: fix parsing of "brl=" option
Nicolas Iooss [Thu, 25 Aug 2016 22:17:00 +0000 (15:17 -0700)]
printk: fix parsing of "brl=" option

Commit bbeddf52adc1 ("printk: move braille console support into separate
braille.[ch] files") moved the parsing of braille-related options into
_braille_console_setup(), changing the type of variable str from char*
to char**.  In this commit, memcmp(str, "brl,", 4) was correctly updated
to memcmp(*str, "brl,", 4) but not memcmp(str, "brl=", 4).

Update the code to make "brl=" option work again and replace memcmp()
with strncmp() to make the compiler able to detect such an issue.

Fixes: bbeddf52adc1 ("printk: move braille console support into separate braille.[ch] files")
Link: http://lkml.kernel.org/r/20160823165700.28952-1-nicolas.iooss_linux@m4x.org
Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@m4x.org>
Cc: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agosoft_dirty: fix soft_dirty during THP split
Andrea Arcangeli [Thu, 25 Aug 2016 22:16:57 +0000 (15:16 -0700)]
soft_dirty: fix soft_dirty during THP split

While adding proper userfaultfd_wp support with bits in pagetable and
swap entry to avoid false positives WP userfaults through swap/fork/
KSM/etc, I've been adding a framework that mostly mirrors soft dirty.

So I noticed in one place I had to add uffd_wp support to the pagetables
that wasn't covered by soft_dirty and I think it should have.

Example: in the THP migration code migrate_misplaced_transhuge_page()
pmd_mkdirty is called unconditionally after mk_huge_pmd.

entry = mk_huge_pmd(new_page, vma->vm_page_prot);
entry = maybe_pmd_mkwrite(pmd_mkdirty(entry), vma);

That sets soft dirty too (it's a false positive for soft dirty, the soft
dirty bit could be more finegrained and transfer the bit like uffd_wp
will do..  pmd/pte_uffd_wp() enforces the invariant that when it's set
pmd/pte_write is not set).

However in the THP split there's no unconditional pmd_mkdirty after
mk_huge_pmd and pte_swp_mksoft_dirty isn't called after the migration
entry is created.  The code sets the dirty bit in the struct page
instead of setting it in the pagetable (which is fully equivalent as far
as the real dirty bit is concerned, as the whole point of pagetable bits
is to be eventually flushed out of to the page, but that is not
equivalent for the soft-dirty bit that gets lost in translation).

This was found by code review only and totally untested as I'm working
to actually replace soft dirty and I don't have time to test potential
soft dirty bugfixes as well :).

Transfer the soft_dirty from pmd to pte during THP splits.

This fix avoids losing the soft_dirty bit and avoids userland memory
corruption in the checkpoint.

Fixes: eef1b3ba053aa6 ("thp: implement split_huge_pmd()")
Link: http://lkml.kernel.org/r/1471610515-30229-2-git-send-email-aarcange@redhat.com
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Acked-by: Pavel Emelyanov <xemul@virtuozzo.com>
Cc: "Kirill A. Shutemov" <kirill@shutemov.name>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agosysctl: handle error writing UINT_MAX to u32 fields
Subash Abhinov Kasiviswanathan [Thu, 25 Aug 2016 22:16:51 +0000 (15:16 -0700)]
sysctl: handle error writing UINT_MAX to u32 fields

We have scripts which write to certain fields on 3.18 kernels but this
seems to be failing on 4.4 kernels.  An entry which we write to here is
xfrm_aevent_rseqth which is u32.

  echo 4294967295  > /proc/sys/net/core/xfrm_aevent_rseqth

Commit 230633d109e3 ("kernel/sysctl.c: detect overflows when converting
to int") prevented writing to sysctl entries when integer overflow
occurs.  However, this does not apply to unsigned integers.

Heinrich suggested that we introduce a new option to handle 64 bit
limits and set min as 0 and max as UINT_MAX.  This might not work as it
leads to issues similar to __do_proc_doulongvec_minmax.  Alternatively,
we would need to change the datatype of the entry to 64 bit.

  static int __do_proc_doulongvec_minmax(void *data, struct ctl_table
  {
      i = (unsigned long *) data;   //This cast is causing to read beyond the size of data (u32)
      vleft = table->maxlen / sizeof(unsigned long); //vleft is 0 because maxlen is sizeof(u32) which is lesser than sizeof(unsigned long) on x86_64.

Introduce a new proc handler proc_douintvec.  Individual proc entries
will need to be updated to use the new handler.

[akpm@linux-foundation.org: coding-style fixes]
Fixes: 230633d109e3 ("kernel/sysctl.c:detect overflows when converting to int")
Link: http://lkml.kernel.org/r/1471479806-5252-1-git-send-email-subashab@codeaurora.org
Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>
Cc: Heinrich Schuchardt <xypron.glpk@gmx.de>
Cc: Kees Cook <keescook@chromium.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Ingo Molnar <mingo@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agoget_maintainer: quiet noisy implicit -f vcs_file_exists checking
Joe Perches [Thu, 25 Aug 2016 22:16:48 +0000 (15:16 -0700)]
get_maintainer: quiet noisy implicit -f vcs_file_exists checking

Checking command line filenames that are outside the git tree can emit a
noisy and confusing message.

Quiet that message by redirecting stderr.
Verify that the command was executed successfully.

Fixes: 4cad35a7ca69 ("get_maintainer.pl: reduce need for command-line option -f")
Link: http://lkml.kernel.org/r/1970a1d2fecb258e384e2e4fdaacdc9ccf3e30a4.1470955439.git.joe@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Reported-by: Wolfram Sang <wsa@the-dreams.de>
Tested-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agobyteswap: don't use __builtin_bswap*() with sparse
Johannes Berg [Thu, 25 Aug 2016 22:16:45 +0000 (15:16 -0700)]
byteswap: don't use __builtin_bswap*() with sparse

Although sparse declares __builtin_bswap*(), it can't actually do
constant folding inside them (yet).  As such, things like

  switch (protocol) {
  case htons(ETH_P_IP):
          break;
  }

which we do all over the place cause sparse to warn that it expects a
constant instead of a function call.

Disable __HAVE_BUILTIN_BSWAP*__ if __CHECKER__ is defined to avoid this.

Fixes: 7322dd755e7d ("byteswap: try to avoid __builtin_constant_p gcc bug")
Link: http://lkml.kernel.org/r/1470914102-26389-1-git-send-email-johannes@sipsolutions.net
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agoteam: loadbalance: push lacpdus to exact delivery
Jiri Pirko [Thu, 25 Aug 2016 16:30:52 +0000 (18:30 +0200)]
team: loadbalance: push lacpdus to exact delivery

When team is in bridge and LACP is utilized, LACPDU packets are pushed
to userspace using raw socket and there they are processed. However,
since 8626c56c8279b, LACPDU skbs are dropped by bridge rx_handler so
they never reach packet handlers in rx path. Fix this by explicity treat
LACPDUs to be pushed to exact delivery in team rx_handler.

Reported-by: Ido Schimmel <idosch@mellanox.com>
Fixes: 8626c56c8279b ("bridge: fix potential use-after-free when hook returns QUEUE or STOLEN verdict")
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: hns: dereference ppe_cb->ppe_common_cb if it is non-null
Colin Ian King [Thu, 25 Aug 2016 06:51:10 +0000 (07:51 +0100)]
net: hns: dereference ppe_cb->ppe_common_cb if it is non-null

ppe_cb->ppe_common_cb is being dereferenced before a null check is
being made on it.  If ppe_cb->ppe_common_cb is null then we end up
with a null pointer dereference when assigning dsaf_dev.  Fix this
by moving the initialisation of dsaf_dev once we know
ppe_cb->ppe_common_cb is OK to dereference.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Yisen Zhuang <yisen.zhuang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agodlm: fix malfunction of dlm_tool caused by debugfs changes
Eric Ren [Thu, 25 Aug 2016 09:20:59 +0000 (17:20 +0800)]
dlm: fix malfunction of dlm_tool caused by debugfs changes

With the current kernel, `dlm_tool lockdebug` fails as below:

"dlm_tool lockdebug ED0BD86DCE724393918A1AE8FDBF1EE3
can't open /sys/kernel/debug/dlm/ED0BD86DCE724393918A1AE8FDBF1EE3:
Operation not permitted"

This is because table_open() depends on file->f_op to tell which
seq_file ops should be passed down. But, the original file ops in
file->f_op is replaced by "debugfs_full_proxy_file_operations" with
commit 49d200deaa68 ("debugfs: prevent access to removed files'
private data").

Currently, I can think up 2 solutions: 1st, replace
debugfs_create_file() with debugfs_create_file_unsafe();
2nd, make different table_open#() accordingly. The 1st one
is neat, but I don't thoroughly understand its risk. Maybe
someone has a better one.

Signed-off-by: Eric Ren <zren@suse.com>
Signed-off-by: David Teigland <teigland@redhat.com>
8 years agoclocksource/drivers/sun4i: Clear interrupts after stopping timer in probe function
Chen-Yu Tsai [Thu, 25 Aug 2016 06:26:59 +0000 (14:26 +0800)]
clocksource/drivers/sun4i: Clear interrupts after stopping timer in probe function

The bootloader (U-boot) sometimes uses this timer for various delays.
It uses it as a ongoing counter, and does comparisons on the current
counter value. The timer counter is never stopped.

In some cases when the user interacts with the bootloader, or lets
it idle for some time before loading Linux, the timer may expire,
and an interrupt will be pending. This results in an unexpected
interrupt when the timer interrupt is enabled by the kernel, at
which point the event_handler isn't set yet. This results in a NULL
pointer dereference exception, panic, and no way to reboot.

Clear any pending interrupts after we stop the timer in the probe
function to avoid this.

Cc: stable@vger.kernel.org
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
8 years agodrivers/clocksource/pistachio: Fix memory corruption in init
Marcin Nowakowski [Wed, 17 Aug 2016 10:22:33 +0000 (12:22 +0200)]
drivers/clocksource/pistachio: Fix memory corruption in init

Driver init code incorrectly uses the block base address and as a result
clears clocksource structure's fields instead of the hardware registers.

Commit 09a998201649 ("timekeeping: Lift clocksource cacheline
restriction") has changed the offsets within pistachio_clocksource
structure and what has previously gone unnoticed now leads to a kernel
panic during boot.

Signed-off-by: Marcin Nowakowski <marcin.nowakowski@imgtec.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
8 years agoclocksource/drivers/timer-atmel-pit: Enable mck clock
Alexandre Belloni [Tue, 23 Aug 2016 08:44:02 +0000 (10:44 +0200)]
clocksource/drivers/timer-atmel-pit: Enable mck clock

mck is needed to get the PIT working. Explicitly prepare_enable it instead
of assuming it is enabled.

This solves an issue where the system is freezing when the ETM/ETB drivers
are enabled.

Reported-by: Olivier Schonken <olivier.schonken@gmail.com>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
8 years ago8139cp: Fix one possible deadloop in cp_rx_poll
Gao Feng [Thu, 25 Aug 2016 01:45:39 +0000 (09:45 +0800)]
8139cp: Fix one possible deadloop in cp_rx_poll

When cp_rx_poll does not get enough packet, it will check the rx
interrupt status again. If so, it will jumpt to rx_status_loop again.
But the goto jump resets the rx variable as zero too.

As a result, it causes one possible deadloop. Assume this case,
rx_status_loop only gets the packet count which is less than budget,
and (cpr16(IntrStatus) & cp_rx_intr_mask) condition is always true.
It causes the deadloop happens and system is blocked.

Signed-off-by: Gao Feng <fgao@ikuai8.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoi40e: Change some init flow for the client
Anjali Singhai Jain [Thu, 25 Aug 2016 00:51:53 +0000 (17:51 -0700)]
i40e: Change some init flow for the client

This change makes a common flow for Client instance open during init
and reset path. The Client subtask can handle both the cases instead of
making a separate notify_client_of_open call.
Also it may fix a bug during reset where the service task was leaking
some memory and causing issues.

Change-Id: I7232a32fd52b82e863abb54266fa83122f80a0cd
Signed-off-by: Anjali Singhai Jain <anjali.singhai@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoRevert "phy: IRQ cannot be shared"
Xander Huff [Wed, 24 Aug 2016 21:47:53 +0000 (16:47 -0500)]
Revert "phy: IRQ cannot be shared"

This reverts:
  commit 33c133cc7598 ("phy: IRQ cannot be shared")

On hardware with multiple PHY devices hooked up to the same IRQ line, allow
them to share it.

Sergei Shtylyov says:
  "I'm not sure now what was the reason I concluded that the IRQ sharing
  was impossible... most probably I thought that the kernel IRQ handling
  code exited the loop over the IRQ actions once IRQ_HANDLED was returned
  -- which is obviously not so in reality..."

Signed-off-by: Xander Huff <xander.huff@ni.com>
Signed-off-by: Nathan Sullivan <nathan.sullivan@ni.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: dsa: bcm_sf2: Fix race condition while unmasking interrupts
Florian Fainelli [Wed, 24 Aug 2016 18:01:20 +0000 (11:01 -0700)]
net: dsa: bcm_sf2: Fix race condition while unmasking interrupts

We kept shadow copies of which interrupt sources we have enabled and
disabled, but due to an order bug in how intrl2_mask_clear was defined,
we could run into the following scenario:

CPU0 CPU1
intrl2_1_mask_clear(..)
sets INTRL2_CPU_MASK_CLEAR
bcm_sf2_switch_1_isr
read INTRL2_CPU_STATUS and masks with stale
irq1_mask value
updates irq1_mask value

Which would make us loop again and again trying to process and interrupt
we are not clearing since our copy of whether it was enabled before
still indicates it was not. Fix this by updating the shadow copy first,
and then unasking at the HW level.

Fixes: 246d7f773c13 ("net: dsa: add Broadcom SF2 switch driver")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoqdisc: fix a module refcount leak in qdisc_create_dflt()
Eric Dumazet [Wed, 24 Aug 2016 16:39:02 +0000 (09:39 -0700)]
qdisc: fix a module refcount leak in qdisc_create_dflt()

Should qdisc_alloc() fail, we must release the module refcount
we got right before.

Fixes: 6da7c8fcbcbd ("qdisc: allow setting default queuing discipline")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: John Fastabend <john.r.fastabend@intel.com>
Acked-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agotipc: fix the error handling in tipc_udp_enable()
Wei Yongjun [Wed, 24 Aug 2016 13:32:19 +0000 (13:32 +0000)]
tipc: fix the error handling in tipc_udp_enable()

Fix to return a negative error code in enable_mcast() error handling
case, and release udp socket when necessary.

Fixes: d0f91938bede ("tipc: add ip/udp media type")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agommc: fix use-after-free of struct request
Adrian Hunter [Thu, 25 Aug 2016 20:11:43 +0000 (14:11 -0600)]
mmc: fix use-after-free of struct request

We call mmc_req_is_special() after having processed a request, but
it could be freed after that. Check that ahead of time, and use
the cached value.

Reported-by: Hans de Goede <hdegoede@redhat.com>
Tested-by: Hans de Goede <hdegoede@redhat.com>
Fixes: c2df40dfb8c0 ("drivers: use req op accessor")
Signed-off-by: Jens Axboe <axboe@fb.com>
8 years agoMerge tag 'drm-intel-fixes-2016-08-25' of git://anongit.freedesktop.org/drm-intel...
Dave Airlie [Thu, 25 Aug 2016 19:18:40 +0000 (05:18 +1000)]
Merge tag 'drm-intel-fixes-2016-08-25' of git://anongit.freedesktop.org/drm-intel into drm-fixes

i915 fixes queue.

* tag 'drm-intel-fixes-2016-08-25' of git://anongit.freedesktop.org/drm-intel:
  drm/i915: Fix botched merge that downgrades CSR versions.
  drm/i915/skl: Ensure pipes with changed wms get added to the state
  drm/i915/gen9: Only copy WM results for changed pipes to skl_hw
  drm/i915/skl: Add support for the SAGV, fix underrun hangs
  drm/i915/gen6+: Interpret mailbox error flags
  drm/i915: Reattach comment, complete type specification
  drm/i915: Unconditionally flush any chipset buffers before execbuf
  drm/i915/gen9: Drop invalid WARN() during data rate calculation
  drm/i915/gen9: Initialize intel_state->active_crtcs during WM sanitization (v2)