git.openwrt.org Git - openwrt/staging/blogic.git/log

Revert "net/ipv6: fix metrics leak"

This reverts commit df18b50448fab1dff093731dfd0e25e77e1afcd1.

This change causes other problems and use-after-free situations as
found by syzbot.

Signed-off-by: David S. Miller <davem@davemloft.net>

rxrpc: Fix user call ID check in rxrpc_service_prealloc_one

There just check the user call ID isn't already in use, hence should
compare user_call_ID with xcall->user_call_ID, which is current
node's user_call_ID.

Fixes: 540b1c48c37a ("rxrpc: Fix deadlock between call creation and sendmsg/recvmsg")
Suggested-by: David Howells <dhowells@redhat.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: dsa: Do not suspend/resume closed slave_dev

If a DSA slave network device was previously disabled, there is no need
to suspend or resume it.

Fixes: 2446254915a7 ("net: dsa: allow switch drivers to implement suspend/resume hooks")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

netlink: Fix spectre v1 gadget in netlink_create()

'protocol' is a user-controlled value, so sanitize it after the bounds
check to avoid using it for speculative out-of-bounds access to arrays
indexed by it.

This addresses the following accesses detected with the help of smatch:

* net/netlink/af_netlink.c:654 __netlink_create() warn: potential
  spectre issue 'nlk_cb_mutex_keys' [w]

* net/netlink/af_netlink.c:654 __netlink_create() warn: potential
  spectre issue 'nlk_cb_mutex_key_strings' [w]

* net/netlink/af_netlink.c:685 netlink_create() warn: potential spectre
  issue 'nl_table' [w] (local cap)

Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Jeremy Cline <jcline@redhat.com>
Reviewed-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Documentation: dpaa2: Use correct heading adornment

Add overline heading adornment to document title in order to comply
with kernel doc requirements.

Fixes: 60b9131 staging: fsl-mc: Convert documentation to rst format
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: stmmac: Fix WoL for PCI-based setups

WoL won't work in PCI-based setups because we are not saving the PCI EP
state before entering suspend state and not allowing D3 wake.

Fix this by using a wrapper around stmmac_{suspend/resume} which
correctly sets the PCI EP state.

Signed-off-by: Jose Abreu <joabreu@synopsys.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Joao Pinto <jpinto@synopsys.com>
Cc: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Cc: Alexandre Torgue <alexandre.torgue@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

bonding: avoid lockdep confusion in bond_get_stats()

syzbot found that the following sequence produces a LOCKDEP splat [1]

ip link add bond10 type bond
ip link add bond11 type bond
ip link set bond11 master bond10

To fix this, we can use the already provided nest_level.

This patch also provides correct nesting for dev->addr_list_lock

[1]
WARNING: possible recursive locking detected
4.18.0-rc6+ #167 Not tainted
--------------------------------------------
syz-executor751/4439 is trying to acquire lock:
(____ptrval____) (&(&bond->stats_lock)->rlock){+.+.}, at: spin_lock include/linux/spinlock.h:310 [inline]
(____ptrval____) (&(&bond->stats_lock)->rlock){+.+.}, at: bond_get_stats+0xb4/0x560 drivers/net/bonding/bond_main.c:3426

but task is already holding lock:
(____ptrval____) (&(&bond->stats_lock)->rlock){+.+.}, at: spin_lock include/linux/spinlock.h:310 [inline]
(____ptrval____) (&(&bond->stats_lock)->rlock){+.+.}, at: bond_get_stats+0xb4/0x560 drivers/net/bonding/bond_main.c:3426

other info that might help us debug this:
Possible unsafe locking scenario:

       CPU0
       ----
  lock(&(&bond->stats_lock)->rlock);
  lock(&(&bond->stats_lock)->rlock);

*** DEADLOCK ***

May be due to missing lock nesting notation

3 locks held by syz-executor751/4439:
#0: (____ptrval____) (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:77
#1: (____ptrval____) (&(&bond->stats_lock)->rlock){+.+.}, at: spin_lock include/linux/spinlock.h:310 [inline]
#1: (____ptrval____) (&(&bond->stats_lock)->rlock){+.+.}, at: bond_get_stats+0xb4/0x560 drivers/net/bonding/bond_main.c:3426
#2: (____ptrval____) (rcu_read_lock){....}, at: bond_get_stats+0x0/0x560 include/linux/compiler.h:215

stack backtrace:
CPU: 0 PID: 4439 Comm: syz-executor751 Not tainted 4.18.0-rc6+ #167
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113
print_deadlock_bug kernel/locking/lockdep.c:1765 [inline]
check_deadlock kernel/locking/lockdep.c:1809 [inline]
validate_chain kernel/locking/lockdep.c:2405 [inline]
__lock_acquire.cold.64+0x1fb/0x486 kernel/locking/lockdep.c:3435
lock_acquire+0x1e4/0x540 kernel/locking/lockdep.c:3924
__raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:144
spin_lock include/linux/spinlock.h:310 [inline]
bond_get_stats+0xb4/0x560 drivers/net/bonding/bond_main.c:3426
dev_get_stats+0x10f/0x470 net/core/dev.c:8316
bond_get_stats+0x232/0x560 drivers/net/bonding/bond_main.c:3432
dev_get_stats+0x10f/0x470 net/core/dev.c:8316
rtnl_fill_stats+0x4d/0xac0 net/core/rtnetlink.c:1169
rtnl_fill_ifinfo+0x1aa6/0x3fb0 net/core/rtnetlink.c:1611
rtmsg_ifinfo_build_skb+0xc8/0x190 net/core/rtnetlink.c:3268
rtmsg_ifinfo_event.part.30+0x45/0xe0 net/core/rtnetlink.c:3300
rtmsg_ifinfo_event net/core/rtnetlink.c:3297 [inline]
rtnetlink_event+0x144/0x170 net/core/rtnetlink.c:4716
notifier_call_chain+0x180/0x390 kernel/notifier.c:93
__raw_notifier_call_chain kernel/notifier.c:394 [inline]
raw_notifier_call_chain+0x2d/0x40 kernel/notifier.c:401
call_netdevice_notifiers_info+0x3f/0x90 net/core/dev.c:1735
call_netdevice_notifiers net/core/dev.c:1753 [inline]
netdev_features_change net/core/dev.c:1321 [inline]
netdev_change_features+0xb3/0x110 net/core/dev.c:7759
bond_compute_features.isra.47+0x585/0xa50 drivers/net/bonding/bond_main.c:1120
bond_enslave+0x1b25/0x5da0 drivers/net/bonding/bond_main.c:1755
bond_do_ioctl+0x7cb/0xae0 drivers/net/bonding/bond_main.c:3528
dev_ifsioc+0x43c/0xb30 net/core/dev_ioctl.c:327
dev_ioctl+0x1b5/0xcc0 net/core/dev_ioctl.c:493
sock_do_ioctl+0x1d3/0x3e0 net/socket.c:992
sock_ioctl+0x30d/0x680 net/socket.c:1093
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:500 [inline]
do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:684
ksys_ioctl+0xa9/0xd0 fs/ioctl.c:701
__do_sys_ioctl fs/ioctl.c:708 [inline]
__se_sys_ioctl fs/ioctl.c:706 [inline]
__x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:706
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x440859
Code: e8 2c af 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 3b 10 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffc51a92878 EFLAGS: 00000213 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440859
RDX: 0000000020000040 RSI: 0000000000008990 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00000000004002c8 R09: 00000000004002c8
R10: 00000000022d5880 R11: 0000000000000213 R12: 0000000000007390
R13: 0000000000401db0 R14: 0000000000000000 R15: 0000000000000000

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Jay Vosburgh <j.vosburgh@gmail.com>
Cc: Veaceslav Falico <vfalico@gmail.com>
Cc: Andy Gospodarek <andy@greyhouse.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

enic: do not call enic_change_mtu in enic_probe

In commit ab123fe071c9 ("enic: handle mtu change for vf properly")
ASSERT_RTNL() is added to _enic_change_mtu() to prevent it from being
called without rtnl held. enic_probe() calls enic_change_mtu()
without rtnl held. At this point netdev is not registered yet.
Remove call to enic_change_mtu and assign the mtu to netdev->mtu.

Fixes: ab123fe071c9 ("enic: handle mtu change for vf properly")
Signed-off-by: Govindarajulu Varadarajan <gvaradar@cisco.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

ipv4: frags: handle possible skb truesize change

ip_frag_queue() might call pskb_pull() on one skb that
is already in the fragment queue.

We need to take care of possible truesize change, or we
might have an imbalance of the netns frags memory usage.

IPv6 is immune to this bug, because RFC5722, Section 4,
amended by Errata ID 3089 states :

  When reassembling an IPv6 datagram, if
  one or more its constituent fragments is determined to be an
  overlapping fragment, the entire datagram (and any constituent
  fragments) MUST be silently discarded.

Fixes: 158f323b9868 ("net: adjust skb->truesize in pskb_expand_head()")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

inet: frag: enforce memory limits earlier

We currently check current frags memory usage only when
a new frag queue is created. This allows attackers to first
consume the memory budget (default : 4 MB) creating thousands
of frag queues, then sending tiny skbs to exceed high_thresh
limit by 2 to 3 order of magnitude.

Note that before commit 648700f76b03 ("inet: frags: use rhashtables
for reassembly units"), work queue could be starved under DOS,
getting no cpu cycles.
After commit 648700f76b03, only the per frag queue timer can eventually
remove an incomplete frag queue and its skbs.

Fixes: b13d3cbfb8e8 ("inet: frag: move eviction of queues to work queue")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Jann Horn <jannh@google.com>
Cc: Florian Westphal <fw@strlen.de>
Cc: Peter Oskolkov <posk@google.com>
Cc: Paolo Abeni <pabeni@redhat.com>
Acked-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge tag 'mlx5-fixes-2018-07-31' of git://git./linux/kernel/git/saeed/linux

Saeed Mahameed says:

====================
Mellanox, mlx5 fixes 2018-07-31

The following series includes four mlx5 fixes.

Please pull and let me know if there's any problem.

For -stable v4.14
net/mlx5e: E-Switch, Initialize eswitch only if eswitch manager

For -stable v4.16
net/mlx5e: Set port trust mode to PCP as default

For -stable v4.17
net/mlx5e: IPoIB, Set the netdevice sw mtu in ipoib enhanced flow
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

net/mlx5e: IPoIB, Set the netdevice sw mtu in ipoib enhanced flow

After introduction of the cited commit, mlx5e_build_nic_params
receives the netdevice mtu in order to set the sw_mtu of mlx5e_params.
For enhanced IPoIB, the netdevice mtu is not set in this stage,
therefore, the initial sw_mtu equals zero. As a result, the hw_mtu
of the receive queue will be calculated incorrectly causing traffic
issues.

To fix this issue, query for port mtu before building the nic params.

Fixes: 472a1e44b349 ("net/mlx5e: Save MTU in channels params")
Signed-off-by: Feras Daoud <ferasda@mellanox.com>
Reviewed-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

net/mlx5e: Fix null pointer access when setting MTU of vport representor

MTU helper function is used by both conventional mlx5e
instances (PF/VF) and the eswitch representors. The representor
shouldn't change the nic vport context MTU, the VF is responsible for
that. Therefore set_mtu_cb has a null value when changing the
representor MTU.

Fixes: 250a42b6a764 ("net/mlx5e: Support configurable MTU for vport representors")
Signed-off-by: Adi Nissim <adin@mellanox.com>
Reviewed-by: Yevgeny Kliteynik <kliteyn@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

net/mlx5e: Set port trust mode to PCP as default

The hairpin offload code has dependency on the trust mode being PCP.

Hence we should set PCP as the default for handling cases where we are
disallowed to read the trust mode from the FW, or failed to initialize it.

Fixes: 106be53b6b0a ('net/mlx5e: Set per priority hairpin pairs')
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Reviewed-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

net/mlx5e: E-Switch, Initialize eswitch only if eswitch manager

Execute mlx5_eswitch_init() only if we have MLX5_ESWITCH_MANAGER
capabilities.
Do the same for mlx5_eswitch_cleanup().

Fixes: a9f7705ffd66 ("net/mlx5: Unify vport manager capability check")
Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

net: dsa: mv88e6xxx: Fix SERDES support on 88E6141/6341

Version 1 of the patch adding SERDES support to the 88E6141/6341
correctly added the ops to the 88E6141/6341. However, by the time
version 3 was committed, the ops had moved to the 88E6085/6175. Put
them back where they belong.

Fixes: 5bafeb6e7e87 ("net: dsa: mv88e6xxx: 88E6141/6341 SERDES support")
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge tag 'wireless-drivers-for-davem-2018-07-31' of git://git./linux/kernel/git/kvalo/wireless-drivers

Kalle Valo says:

====================
wireless-drivers fixes for 4.18

Last set of fixes before 4.18 is released

iwlwifi

* add new IDs for cards already available on the market

brcmfmac

* fix a regression introduced in v4.17
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

Merge tag 'scsi-fixes' of git://git./linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
"Nine fixes, five in the qla2xxx driver, the most serious of which is
  the uninitialized list head crash which can be observed in most
  systems under a sufficiently loaded low memory environment.

  The two sg fixes are minor but obvious and two target ones which seem
  reasonable but not high impact"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: qla2xxx: Return error when TMF returns
  scsi: qla2xxx: Fix ISP recovery on unload
  scsi: qla2xxx: Fix driver unload by shutting down chip
  scsi: qla2xxx: Fix NPIV deletion by calling wait_for_sess_deletion
  scsi: qla2xxx: Fix unintialized List head crash
  scsi: sg: update comment for blk_get_request()
  scsi: sg: fix minor memory leak in error path
  scsi: libiscsi: fix possible NULL pointer dereference in case of TMF
  scsi: target: iscsi: cxgbit: fix max iso npdu calculation

Merge tag 'for_linus' of git://git./linux/kernel/git/mst/vhost

Pull virtio fixes from Michael Tsirkin:
"Some bugfixes that seem important and safe enough to merge at the last
  minute"

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
  virtio_balloon: fix another race between migration and ballooning
  tools/virtio: add kmalloc_array stub
  tools/virtio: add dma barrier stubs

Merge tag 'acpi-urgent-4.18' of git://git./linux/kernel/git/rafael/linux-pm

Pull ACPI fixes from Rafael Wysocki:
"These fix a recent ACPICA regression affecting control method
  execution at the table level and an earlier hibernation regression in
  the ACPI driver for Intel SoCs (LPSS) that was missed by a previous
  fix in this cycle.

  Specifics:

   - Fix a recent ACPICA regression introduced by a previous fix that
     caused control method execution at the table level to be mishandled
     by mistake (Erik Schmauss).

   - Fix a hibernation regression from the 4.15 cycle in the ACPI driver
     for Intel SoCs (LPSS) that caused the platform firmware to be
     confused during resume from hibernation by the driver's PM quirks
     which was fixed for system-wide suspend/resume (ACPI S3) earlier in
     this cycle, but that previous fix missed the hibernation (ACPI S4)
     case (Rafael Wysocki)"

* tag 'acpi-urgent-4.18' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPICA: AML Parser: ignore control method status in module-level code
  ACPI / LPSS: Avoid PM quirks on suspend and resume from hibernation

Merge branch 'acpi-soc'

Merge a fix for hibernation regression in the ACPI driver for Intel
SoCs (LPSS).

* acpi-soc:
ACPI / LPSS: Avoid PM quirks on suspend and resume from hibernation

Merge git://git./linux/kernel/git/davem/net

Pull networking fixes from David Miller:
"Several smallish fixes, I don't think any of this requires another -rc
  but I'll leave that up to you:

   1) Don't leak uninitialzed bytes to userspace in xfrm_user, from Eric
      Dumazet.

   2) Route leak in xfrm_lookup_route(), from Tommi Rantala.

   3) Premature poll() returns in AF_XDP, from Björn Töpel.

   4) devlink leak in netdevsim, from Jakub Kicinski.

   5) Don't BUG_ON in fib_compute_spec_dst, the condition can
      legitimately happen. From Lorenzo Bianconi.

   6) Fix some spectre v1 gadgets in generic socket code, from Jeremy
      Cline.

   7) Don't allow user to bind to out of range multicast groups, from
      Dmitry Safonov with a follow-up by Dmitry Safonov.

   8) Fix metrics leak in fib6_drop_pcpu_from(), from Sabrina Dubroca"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (41 commits)
  netlink: Don't shift with UB on nlk->ngroups
  net/ipv6: fix metrics leak
  xen-netfront: wait xenbus state change when load module manually
  can: ems_usb: Fix memory leak on ems_usb_disconnect()
  openvswitch: meter: Fix setting meter id for new entries
  netlink: Do not subscribe to non-existent groups
  NET: stmmac: align DMA stuff to largest cache line length
  tcp_bbr: fix bw probing to raise in-flight data for very small BDPs
  net: socket: Fix potential spectre v1 gadget in sock_is_registered
  net: socket: fix potential spectre v1 gadget in socketcall
  net: mdio-mux: bcm-iproc: fix wrong getter and setter pair
  ipv4: remove BUG_ON() from fib_compute_spec_dst
  enic: handle mtu change for vf properly
  net: lan78xx: fix rx handling before first packet is send
  nfp: flower: fix port metadata conversion bug
  bpf: use GFP_ATOMIC instead of GFP_KERNEL in bpf_parse_prog()
  bpf: fix bpf_skb_load_bytes_relative pkt length check
  perf build: Build error in libbpf missing initialization
  net: ena: Fix use of uninitialized DMA address bits field
  bpf: btf: Use exact btf value_size match in map_check_btf()
  ...

Merge git://git./linux/kernel/git/davem/sparc

Pull sparc fixes from David Miller:
"Some small __init annotation and build fixes from Stephen Rostedt and
  Thomas Petazzoni"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
  sparc: use asm-generic version of msi.h
  sparc: move MSI related definitions to where they are used
  sparc/time: Add missing __init to init_tick_ops()

squashfs: more metadata hardening

Anatoly reports another squashfs fuzzing issue, where the decompression
parameters themselves are in a compressed block.

This causes squashfs_read_data() to be called in order to read the
decompression options before the decompression stream having been set
up, making squashfs go sideways.

Reported-by: Anatoly Trosinenko <anatoly.trosinenko@gmail.com>
Acked-by: Phillip Lougher <phillip.lougher@gmail.com>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

sparc: use asm-generic version of msi.h

This is necessary to be able to include <linux/msi.h> when
CONFIG_GENERIC_MSI_IRQ_DOMAIN is enabled. Without this, a build with
CONFIG_GENERIC_MSI_IRQ_DOMAIN fails with:

   In file included from drivers//ata/ahci.c:45:0:
>> include/linux/msi.h:226:10: error: unknown type name 'msi_alloc_info_t'; did you mean 'sg_alloc_fn'?
             msi_alloc_info_t *arg);
             ^~~~~~~~~~~~~~~~
             sg_alloc_fn
   include/linux/msi.h:230:9: error: unknown type name 'msi_alloc_info_t'; did you mean 'sg_alloc_fn'?
            msi_alloc_info_t *arg);
            ^~~~~~~~~~~~~~~~
            sg_alloc_fn
   include/linux/msi.h:239:12: error: unknown type name 'msi_alloc_info_t'; did you mean 'sg_alloc_fn'?
               msi_alloc_info_t *arg);
               ^~~~~~~~~~~~~~~~
               sg_alloc_fn
   include/linux/msi.h:240:22: error: unknown type name 'msi_alloc_info_t'; did you mean 'sg_alloc_fn'?
     void  (*msi_finish)(msi_alloc_info_t *arg, int retval);
                         ^~~~~~~~~~~~~~~~
                         sg_alloc_fn
   include/linux/msi.h:241:20: error: unknown type name 'msi_alloc_info_t'; did you mean 'sg_alloc_fn'?
     void  (*set_desc)(msi_alloc_info_t *arg,
                       ^~~~~~~~~~~~~~~~
                       sg_alloc_fn
   include/linux/msi.h:316:18: error: unknown type name 'msi_alloc_info_t'; did you mean 'sg_alloc_fn'?
           int nvec, msi_alloc_info_t *args);
                     ^~~~~~~~~~~~~~~~
                     sg_alloc_fn
   include/linux/msi.h:318:29: error: unknown type name 'msi_alloc_info_t'; did you mean 'sg_alloc_fn'?
            int virq, int nvec, msi_alloc_info_t *args);
                                ^~~~~~~~~~~~~~~~
                                sg_alloc_fn

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

sparc: move MSI related definitions to where they are used

The definitions in arch/sparc/include/asm/msi.h are only used in
arch/sparc/mm/srmmu.c, so it makes sense to have them in the C file
directly.

In addition, having a custom arch/sparc/include/asm/msi.h prevents
from using the asm-generic version of this header, which is necessary
to be able to include <linux/msi.h> when CONFIG_GENERIC_MSI_IRQ_DOMAIN
is enabled.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

sparc/time: Add missing __init to init_tick_ops()

Code that was added to force gcc not to inline any function that isn't
explicitly declared as inline uncovered that init_tick_ops() isn't
marked as "__init". It is only called by __init functions and more
importantly it too calls an __init function which would require it to be
__init as well.

Link: http://lkml.kernel.org/r/201806060444.hdHcKOBy%fengguang.wu@intel.com
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

netlink: Don't shift with UB on nlk->ngroups

On i386 nlk->ngroups might be 32 or 0. Which leads to UB, resulting in
hang during boot.
Check for 0 ngroups and use (unsigned long long) as a type to shift.

Fixes: 7acf9d4237c4 ("netlink: Do not subscribe to non-existent groups").
Reported-by: kernel test robot <rong.a.chen@intel.com>
Signed-off-by: Dmitry Safonov <dima@arista.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge tag 'linux-can-fixes-for-4.18-20180730' of ssh://gitolite./linux/kernel/git/mkl/linux-can

Marc Kleine-Budde says:

====================
pull-request: can 2018-07-30

this is a pull request of one patch for net/master.

The patch by Anton Vasilyev and the Linux Driver Verification project
fixes a memory leak in the ems_usb driver's disconnect function.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull x86 fixes from Ingo Molnar:
"Misc fixes:

   - a build race fix

   - a Xen entry fix

   - a TSC_DEADLINE quirk future-proofing fix"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/boot: Fix if_changed build flip/flop bug
  x86/entry/64: Remove %ebx handling from error_entry/exit
  x86/apic: Future-proof the TSC_DEADLINE quirk for SKX

Merge branch 'sched-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull scheduler fixes from Ingo Molnar:
"Misc fixes:

   - a deadline scheduler related bug fix which triggered a kernel
     warning

   - an RT_RUNTIME_SHARE fix

   - a stop_machine preemption fix

   - a potential NULL dereference fix in sched_domain_debug_one()"

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/rt: Restore rt_runtime after disabling RT_RUNTIME_SHARE
  sched/deadline: Update rq_clock of later_rq when pushing a task
  stop_machine: Disable preemption after queueing stopper threads
  sched/topology: Check variable group before dereferencing it

Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull perf fixes from Ingo Molnar:
"Misc fixes:

   - AMD IBS data corruptor fix (uncovered by UBSAN)

   - an Intel PEBS entry unwind error fix

   - a HW-tracing crash fix

   - a MAINTAINERS update"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/core: Fix crash when using HW tracing kernel filters
  perf/x86/intel: Fix unwind errors from PEBS entries (mk-II)
  MAINTAINERS: Add Naveen N. Rao as kprobes co-maintainer
  perf/x86/amd/ibs: Don't access non-started event

Merge branch 'locking-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull locking fixes from Ingo Molnar:
"A paravirt UP-patching fix, and an I2C MUX driver lockdep warning fix"

* 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  locking/pvqspinlock/x86: Use LOCK_PREFIX in __pv_queued_spin_unlock() assembly code
  i2c/mux, locking/core: Annotate the nested rt_mutex usage
  locking/rtmutex: Allow specifying a subclass for nested locking

Merge branch 'efi-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull EFI fix from Ingo Molnar:
"An UEFI variables fix for SEV guests"

* 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/efi: Access EFI MMIO data as unencrypted when SEV is active

net/ipv6: fix metrics leak

Since commit d4ead6b34b67 ("net/ipv6: move metrics from dst to
rt6_info"), ipv6 metrics are shared and refcounted. rt6_set_from()
assigns the rt->from pointer and increases the refcount on from's
metrics. This reference is never released.

Introduce the fib6_metrics_release() helper and use it to release the
metrics.

Fixes: d4ead6b34b67 ("net/ipv6: move metrics from dst to rt6_info")
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

xen-netfront: wait xenbus state change when load module manually

When loading module manually, after call xenbus_switch_state to initializes
the state of the netfront device, the driver state did not change so fast
that may lead no dev created in latest kernel. This patch adds wait to make
sure xenbus knows the driver is not in closed/unknown state.

Current state:
[vm]# ethtool eth0
Settings for eth0:
Link detected: yes
[vm]# modprobe -r xen_netfront
[vm]# modprobe xen_netfront
[vm]# ethtool eth0
Settings for eth0:
Cannot get device settings: No such device
Cannot get wake-on-lan settings: No such device
Cannot get message level: No such device
Cannot get link status: No such device
No data available

With the patch installed.
[vm]# ethtool eth0
Settings for eth0:
Link detected: yes
[vm]# modprobe -r xen_netfront
[vm]# modprobe xen_netfront
[vm]# ethtool eth0
Settings for eth0:
Link detected: yes

Signed-off-by: Xiao Liang <xiliang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

virtio_balloon: fix another race between migration and ballooning

Kernel panic when with high memory pressure, calltrace looks like,

PID: 21439 TASK: ffff881be3afedd0 CPU: 16 COMMAND: "java"
#0 [ffff881ec7ed7630] machine_kexec at ffffffff81059beb
#1 [ffff881ec7ed7690] __crash_kexec at ffffffff81105942
#2 [ffff881ec7ed7760] crash_kexec at ffffffff81105a30
#3 [ffff881ec7ed7778] oops_end at ffffffff816902c8
#4 [ffff881ec7ed77a0] no_context at ffffffff8167ff46
#5 [ffff881ec7ed77f0] __bad_area_nosemaphore at ffffffff8167ffdc
#6 [ffff881ec7ed7838] __node_set at ffffffff81680300
#7 [ffff881ec7ed7860] __do_page_fault at ffffffff8169320f
#8 [ffff881ec7ed78c0] do_page_fault at ffffffff816932b5
#9 [ffff881ec7ed78f0] page_fault at ffffffff8168f4c8
    [exception RIP: _raw_spin_lock_irqsave+47]
    RIP: ffffffff8168edef RSP: ffff881ec7ed79a8 RFLAGS: 00010046
    RAX: 0000000000000246 RBX: ffffea0019740d00 RCX: ffff881ec7ed7fd8
    RDX: 0000000000020000 RSI: 0000000000000016 RDI: 0000000000000008
    RBP: ffff881ec7ed79a8 R8: 0000000000000246 R9: 000000000001a098
    R10: ffff88107ffda000 R11: 0000000000000000 R12: 0000000000000000
    R13: 0000000000000008 R14: ffff881ec7ed7a80 R15: ffff881be3afedd0
    ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018

It happens in the pagefault and results in double pagefault
during compacting pages when memory allocation fails.

Analysed the vmcore, the page leads to second pagefault is corrupted
with _mapcount=-256, but private=0.

It's caused by the race between migration and ballooning, and lock
missing in virtballoon_migratepage() of virtio_balloon driver.
This patch fix the bug.

Fixes: e22504296d4f64f ("virtio_balloon: introduce migration primitives to balloon pages")
Cc: stable@vger.kernel.org
Signed-off-by: Jiang Biao <jiang.biao2@zte.com.cn>
Signed-off-by: Huang Chong <huang.chong@zte.com.cn>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

can: ems_usb: Fix memory leak on ems_usb_disconnect()

ems_usb_probe() allocates memory for dev->tx_msg_buffer, but there
is no its deallocation in ems_usb_disconnect().

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Anton Vasilyev <vasilyev@ispras.ru>
Cc: <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

Linux 4.18-rc7

openvswitch: meter: Fix setting meter id for new entries

The meter code would create an entry for each new meter. However, it
would not set the meter id in the new entry, so every meter would appear
to have a meter id of zero. This commit properly sets the meter id when
adding the entry.

Fixes: 96fbc13d7e77 ("openvswitch: Add meter infrastructure")
Signed-off-by: Justin Pettit <jpettit@ovn.org>
Cc: Andy Zhou <azhou@ovn.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge tag 'ext4_for_linus_stable' of git://git./linux/kernel/git/tytso/ext4

Pull ext4 fixes from Ted Ts'o:
"Some miscellaneous ext4 fixes for 4.18; one fix is for a regression
  introduced in 4.18-rc4.

  Sorry for the late-breaking pull. I was originally going to wait for
  the next merge window, but Eric Whitney found a regression introduced
  in 4.18-rc4, so I decided to push out the regression plus the other
  fixes now. (The other commits have been baking in linux-next since
  early July)"

* tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  ext4: fix check to prevent initializing reserved inodes
  ext4: check for allocation block validity with block group locked
  ext4: fix inline data updates with checksums enabled
  ext4: clear mmp sequence number when remounting read-only
  ext4: fix false negatives *and* false positives in ext4_check_descriptors()

netlink: Do not subscribe to non-existent groups

Make ABI more strict about subscribing to group > ngroups.
Code doesn't check for that and it looks bogus.
(one can subscribe to non-existing group)
Still, it's possible to bind() to all possible groups with (-1)

Cc: "David S. Miller" <davem@davemloft.net>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Cc: netdev@vger.kernel.org
Signed-off-by: Dmitry Safonov <dima@arista.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

squashfs: be more careful about metadata corruption

Anatoly Trosinenko reports that a corrupted squashfs image can cause a
kernel oops. It turns out that squashfs can end up being confused about
negative fragment lengths.

The regular squashfs_read_data() does check for negative lengths, but
squashfs_read_metadata() did not, and the fragment size code just
blindly trusted the on-disk value. Fix both the fragment parsing and
the metadata reading code.

Reported-by: Anatoly Trosinenko <anatoly.trosinenko@gmail.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Phillip Lougher <phillip@squashfs.org.uk>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

ext4: fix check to prevent initializing reserved inodes

Commit 8844618d8aa7: "ext4: only look at the bg_flags field if it is
valid" will complain if block group zero does not have the
EXT4_BG_INODE_ZEROED flag set.  Unfortunately, this is not correct,
since a freshly created file system has this flag cleared.  It gets
almost immediately after the file system is mounted read-write --- but
the following somewhat unlikely sequence will end up triggering a
false positive report of a corrupted file system:

   mkfs.ext4 /dev/vdc
   mount -o ro /dev/vdc /vdc
   mount -o remount,rw /dev/vdc

Instead, when initializing the inode table for block group zero, test
to make sure that itable_unused count is not too large, since that is
the case that will result in some or all of the reserved inodes
getting cleared.

This fixes the failures reported by Eric Whiteney when running
generic/230 and generic/231 in the the nojournal test case.

Fixes: 8844618d8aa7 ("ext4: only look at the bg_flags field if it is valid")
Reported-by: Eric Whitney <enwlinux@gmail.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

NET: stmmac: align DMA stuff to largest cache line length

As for today STMMAC_ALIGN macro (which is used to align DMA stuff)
relies on L1 line length (L1_CACHE_BYTES).
This isn't correct in case of system with several cache levels
which might have L1 cache line length smaller than L2 line. This
can lead to sharing one cache line between DMA buffer and other
data, so we can lose this data while invalidate DMA buffer before
DMA transaction.

Fix that by using SMP_CACHE_BYTES instead of L1_CACHE_BYTES for
aligning.

Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

ACPICA: AML Parser: ignore control method status in module-level code

Previous change in the AML parser code blindly set all non-successful
dispatcher statuses to AE_OK. That approach is incorrect, though,
because successful control method invocations from module-level
return AE_CTRL_TRANSFER. Overwriting AE_OK to this status causes the
AML parser to think that there was no return value from the control
method invocation.

Fixes: 92c0f4af386 (ACPICA: AML Parser: ignore dispatcher error status during table load)
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Tested-by: Linus Torvalds <torvalds@linux-foundation.org>
Tested-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Signed-off-by: Erik Schmauss <erik.schmauss@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

tcp_bbr: fix bw probing to raise in-flight data for very small BDPs

For some very small BDPs (with just a few packets) there was a
quantization effect where the target number of packets in flight
during the super-unity-gain (1.25x) phase of gain cycling was
implicitly truncated to a number of packets no larger than the normal
unity-gain (1.0x) phase of gain cycling. This meant that in multi-flow
scenarios some flows could get stuck with a lower bandwidth, because
they did not push enough packets inflight to discover that there was
more bandwidth available. This was really only an issue in multi-flow
LAN scenarios, where RTTs and BDPs are low enough for this to be an
issue.

This fix ensures that gain cycling can raise inflight for small BDPs
by ensuring that in PROBE_BW mode target inflight values with a
super-unity gain are always greater than inflight values with a gain
<= 1. Importantly, this applies whether the inflight value is
calculated for use as a cwnd value, or as a target inflight value for
the end of the super-unity phase in bbr_is_next_cycle_phase() (both
need to be bigger to ensure we can probe with more packets in flight
reliably).

This is a candidate fix for stable releases.

Fixes: 0f8782ea1497 ("tcp_bbr: add BBR congestion control")
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Acked-by: Yuchung Cheng <ycheng@google.com>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Acked-by: Priyaranjan Jha <priyarjha@google.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge branch 'net-socket-Fix-potential-spectre-v1-gadgets'

Jeremy Cline says:

====================
net: socket: Fix potential spectre v1 gadgets

This fixes a pair of potential spectre v1 gadgets.

Note that because the speculation window is large, the policy is to stop
the speculative out-of-bounds load and not worry if the attack can be
completed with a dependent load or store[0].

[0] https://marc.info/?l=linux-kernel&m=152449131114778
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

net: socket: Fix potential spectre v1 gadget in sock_is_registered

'family' can be a user-controlled value, so sanitize it after the bounds
check to avoid speculative out-of-bounds access.

Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Jeremy Cline <jcline@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: socket: fix potential spectre v1 gadget in socketcall

'call' is a user-controlled value, so sanitize the array index after the
bounds check to avoid speculating past the bounds of the 'nargs' array.

Found with the help of Smatch:

net/socket.c:2508 __do_sys_socketcall() warn: potential spectre issue
'nargs' [r] (local cap)

Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Jeremy Cline <jcline@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge git://git./pub/scm/linux/kernel/git/bpf/bpf

Daniel Borkmann says:

====================
pull-request: bpf 2018-07-28

The following pull-request contains BPF updates for your *net* tree.

The main changes are:

1) API fixes for libbpf's BTF mapping of map key/value types in order
   to make them compatible with iproute2's BPF_ANNOTATE_KV_PAIR()
   markings, from Martin.

2) Fix AF_XDP to not report POLLIN prematurely by using the non-cached
   consumer pointer of the RX queue, from Björn.

3) Fix __xdp_return() to check for NULL pointer after the rhashtable
   lookup that retrieves the allocator object, from Taehee.

4) Fix x86-32 JIT to adjust ebp register in prologue and epilogue
   by 4 bytes which got removed from overall stack usage, from Wang.

5) Fix bpf_skb_load_bytes_relative() length check to use actual
   packet length, from Daniel.

6) Fix uninitialized return code in libbpf bpf_perf_event_read_simple()
   handler, from Thomas.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

Merge tag 'random_for_linus_stable' of git://git./linux/kernel/git/tytso/random

Pull random fixes from Ted Ts'o:
"In reaction to the fixes to address CVE-2018-1108, some Linux
  distributions that have certain systemd versions in some cases
  combined with patches to libcrypt for FIPS/FEDRAMP compliance, have
  led to boot-time stalls for some hardware.

  The reaction by some distros and Linux sysadmins has been to install
  packages that try to do complicated things with the CPU and hope that
  leads to randomness.

  To mitigate this, if RDRAND is available, mix it into entropy provided
  by userspace. It won't hurt, and it will probably help"

* tag 'random_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random:
  random: mix rdrand with entropy sent in from userspace

net: mdio-mux: bcm-iproc: fix wrong getter and setter pair

mdio_mux_iproc_probe() uses platform_set_drvdata() to store md pointer
in device, whereas mdio_mux_iproc_remove() restores md pointer by
dev_get_platdata(&pdev->dev). This leads to wrong resources release.

The patch replaces getter to platform_get_drvdata.

Fixes: 98bc865a1ec8 ("net: mdio-mux: Add MDIO mux driver for iProc SoCs")
Signed-off-by: Anton Vasilyev <vasilyev@ispras.ru>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

ipv4: remove BUG_ON() from fib_compute_spec_dst

Remove BUG_ON() from fib_compute_spec_dst routine and check
in_dev pointer during flowi4 data structure initialization.
fib_compute_spec_dst routine can be run concurrently with device removal
where ip_ptr net_device pointer is set to NULL. This can happen
if userspace enables pkt info on UDP rx socket and the device
is removed while traffic is flowing

Fixes: 35ebf65e851c ("ipv4: Create and use fib_compute_spec_dst() helper")
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

enic: handle mtu change for vf properly

When driver gets notification for mtu change, driver does not handle it for
all RQs. It handles only RQ[0].

Fix is to use enic_change_mtu() interface to change mtu for vf.

Signed-off-by: Govindarajulu Varadarajan <gvaradar@cisco.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge tag 'gpio-v4.18-2' of git://git./linux/kernel/git/linusw/linux-gpio

Pull GPIO fixes from Linus Walleij:
"Just a smallish OF fix and a driver fix:

   - OF flag fix for special regulator flags

   - fix up the Uniphier IRQ callback"

* tag 'gpio-v4.18-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
  gpio: uniphier: set legitimate irq trigger type in .to_irq hook
  gpio: of: Handle fixed regulator flags properly

net: lan78xx: fix rx handling before first packet is send

As long the bh tasklet isn't scheduled once, no packet from the rx path
will be handled. Since the tx path also schedule the same tasklet
this situation only persits until the first packet transmission.
So fix this issue by scheduling the tasklet after link reset.

Link: https://github.com/raspberrypi/linux/issues/2617
Fixes: 55d7de9de6c3 ("Microchip's LAN7800 family USB 2/3 to 10/100/1000 Ethernet")
Suggested-by: Floris Bos <bos@je-eigen-domein.nl>
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

nfp: flower: fix port metadata conversion bug

Function nfp_flower_repr_get_type_and_port expects an enum nfp_repr_type
return value but, if the repr type is unknown, returns a value of type
enum nfp_flower_cmsg_port_type. This means that if FW encodes the port
ID in a way the driver does not understand instead of dropping the frame
driver may attribute it to a physical port (uplink) provided the port
number is less than physical port count.

Fix this and ensure a net_device of NULL is returned if the repr can not
be determined.

Fixes: 1025351a88a4 ("nfp: add flower app")
Signed-off-by: John Hurley <john.hurley@netronome.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge tag 'mips_fixes_4.18_5' of git://git./linux/kernel/git/mips/linux

Pull MIPS fix from Paul Burton:
"Here's one more MIPS fix, reverting an errata workaround that was
  merged for v4.18-rc2 but has since been found to cause system hangs on
  some BCM4718A1-based systems by the OpenWRT project"

* tag 'mips_fixes_4.18_5' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux:
  Revert "MIPS: BCM47XX: Enable 74K Core ExternalSync for PCIe erratum"

bpf: use GFP_ATOMIC instead of GFP_KERNEL in bpf_parse_prog()

bpf_parse_prog() is protected by rcu_read_lock().
so that GFP_KERNEL is not allowed in the bpf_parse_prog().

[51015.579396] =============================
[51015.579418] WARNING: suspicious RCU usage
[51015.579444] 4.18.0-rc6+ #208 Not tainted
[51015.579464] -----------------------------
[51015.579488] ./include/linux/rcupdate.h:303 Illegal context switch in RCU read-side critical section!
[51015.579510] other info that might help us debug this:
[51015.579532] rcu_scheduler_active = 2, debug_locks = 1
[51015.579556] 2 locks held by ip/1861:
[51015.579577]  #0: 00000000a8c12fd1 (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x2e0/0x910
[51015.579711]  #1: 00000000bf815f8e (rcu_read_lock){....}, at: lwtunnel_build_state+0x96/0x390
[51015.579842] stack backtrace:
[51015.579869] CPU: 0 PID: 1861 Comm: ip Not tainted 4.18.0-rc6+ #208
[51015.579891] Hardware name: To be filled by O.E.M. To be filled by O.E.M./Aptio CRB, BIOS 5.6.5 07/08/2015
[51015.579911] Call Trace:
[51015.579950]  dump_stack+0x74/0xbb
[51015.580000]  ___might_sleep+0x16b/0x3a0
[51015.580047]  __kmalloc_track_caller+0x220/0x380
[51015.580077]  kmemdup+0x1c/0x40
[51015.580077]  bpf_parse_prog+0x10e/0x230
[51015.580164]  ? kasan_kmalloc+0xa0/0xd0
[51015.580164]  ? bpf_destroy_state+0x30/0x30
[51015.580164]  ? bpf_build_state+0xe2/0x3e0
[51015.580164]  bpf_build_state+0x1bb/0x3e0
[51015.580164]  ? bpf_parse_prog+0x230/0x230
[51015.580164]  ? lock_is_held_type+0x123/0x1a0
[51015.580164]  lwtunnel_build_state+0x1aa/0x390
[51015.580164]  fib_create_info+0x1579/0x33d0
[51015.580164]  ? sched_clock_local+0xe2/0x150
[51015.580164]  ? fib_info_update_nh_saddr+0x1f0/0x1f0
[51015.580164]  ? sched_clock_local+0xe2/0x150
[51015.580164]  fib_table_insert+0x201/0x1990
[51015.580164]  ? lock_downgrade+0x610/0x610
[51015.580164]  ? fib_table_lookup+0x1920/0x1920
[51015.580164]  ? lwtunnel_valid_encap_type.part.6+0xcb/0x3a0
[51015.580164]  ? rtm_to_fib_config+0x637/0xbd0
[51015.580164]  inet_rtm_newroute+0xed/0x1b0
[51015.580164]  ? rtm_to_fib_config+0xbd0/0xbd0
[51015.580164]  rtnetlink_rcv_msg+0x331/0x910
[ ... ]

Fixes: 3a0af8fd61f9 ("bpf: BPF for lightweight tunnel infrastructure")
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

bpf: fix bpf_skb_load_bytes_relative pkt length check

The len > skb_headlen(skb) cannot be used as a maximum upper bound
for the packet length since it does not have any relation to the full
linear packet length when filtering is used from upper layers (e.g.
in case of reuseport BPF programs) as by then skb->data, skb->len
already got mangled through __skb_pull() and others.

Fixes: 4e1ec56cdc59 ("bpf: add skb_load_bytes_relative helper")
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Martin KaFai Lau <kafai@fb.com>

perf build: Build error in libbpf missing initialization

In linux-next tree compiling the perf tool with additional make flags
EXTRA_CFLAGS="-Wp,-D_FORTIFY_SOURCE=2 -O2" causes a compiler error.
It is the warning 'variable may be used uninitialized' which is treated
as error: I compile it using a FEDORA 28 installation, my gcc compiler
version: gcc (GCC) 8.0.1 20180324 (Red Hat 8.0.1-0.20). The file that
causes the error is tools/lib/bpf/libbpf.c.

  [root@p23lp27] # make V=1 EXTRA_CFLAGS="-Wp,-D_FORTIFY_SOURCE=2 -O2"
  [...]
  Makefile.config:849: No openjdk development package found, please
     install JDK package, e.g. openjdk-8-jdk, java-1.8.0-openjdk-devel
  Warning: Kernel ABI header at 'tools/include/uapi/linux/if_link.h'
          differs from latest version at 'include/uapi/linux/if_link.h'
    CC       libbpf.o
  libbpf.c: In function ‘bpf_perf_event_read_simple’:
  libbpf.c:2342:6: error: ‘ret’ may be used uninitialized in this
   function [-Werror=maybe-uninitialized]
    int ret;
        ^
  cc1: all warnings being treated as errors
  mv: cannot stat './.libbpf.o.tmp': No such file or directory
  /home6/tmricht/linux-next/tools/build/Makefile.build:96: recipe for target 'libbpf.o' failed

Suggested-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

Merge branch 'i2c/for-current' of git://git./linux/kernel/git/wsa/linux

Pull i2c fixes from Wolfram Sang:
"Some driver bugfixes"

* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: imx: use open drain for recovery GPIO
  i2c: rcar: handle RXDMA HW behaviour on Gen3
  i2c: imx: Fix reinit_completion() use
  i2c: davinci: Avoid zero value of CLKH

Merge tag 'for-linus-20180727' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:
"Bigger than usual at this time, mostly due to the O_DIRECT corruption
  issue and the fact that I was on vacation last week. This contains:

   - NVMe pull request with two fixes for the FC code, and two target
     fixes (Christoph)

   - a DIF bio reset iteration fix (Greg Edwards)

   - two nbd reply and requeue fixes (Josef)

   - SCSI timeout fixup (Keith)

   - a small series that fixes an issue with bio_iov_iter_get_pages(),
     which ended up causing corruption for larger sized O_DIRECT writes
     that ended up racing with buffered writes (Martin Wilck)"

* tag 'for-linus-20180727' of git://git.kernel.dk/linux-block:
  block: reset bi_iter.bi_done after splitting bio
  block: bio_iov_iter_get_pages: pin more pages for multi-segment IOs
  blkdev: __blkdev_direct_IO_simple: fix leak in error case
  block: bio_iov_iter_get_pages: fix size of last iovec
  nvmet: only check for filebacking on -ENOTBLK
  nvmet: fixup crash on NULL device path
  scsi: set timed out out mq requests to complete
  blk-mq: export setting request completion state
  nvme: if_ready checks to fail io to deleting controller
  nvmet-fc: fix target sgl list on large transfers
  nbd: handle unexpected replies better
  nbd: don't requeue the same request twice.

Merge branch 'akpm' (patches from Andrew)

Merge misc fixes from Andrew Morton:
"11 fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  kvm, mm: account shadow page tables to kmemcg
  zswap: re-check zswap_is_full() after do zswap_shrink()
  include/linux/eventfd.h: include linux/errno.h
  mm: fix vma_is_anonymous() false-positives
  mm: use vma_init() to initialize VMAs on stack and data segments
  mm: introduce vma_init()
  mm: fix exports that inadvertently make put_page() EXPORT_SYMBOL_GPL
  ipc/sem.c: prevent queue.status tearing in semop
  mm: disallow mappings that conflict for devm_memremap_pages()
  kasan: only select SLUB_DEBUG with SYSFS=y
  delayacct: fix crash in delayacct_blkio_end() after delayacct init failure

Merge tag 'pci-v4.18-fixes-4' of git://git./linux/kernel/git/helgaas/pci

Pull PCI fix from Bjorn Helgaas:
"Fix a use-after-free error in fatal error recovery (Thomas Tai)"

* tag 'pci-v4.18-fixes-4' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
PCI/AER: Work around use-after-free in pcie_do_fatal_recovery()

Merge tag 'arm64-fixes' of git://git./linux/kernel/git/arm64/linux

Pull arm64 fixes from Will Deacon:
"Inevitably, after saying that I hoped we would be done on the fixes
  front, a couple of issues have cropped up over the last week. Next
  time I'll stay schtum.

  We've fixed an over-eager BUILD_BUG_ON() which Arnd ran into with
  arndconfig, as well as ensuring that KPTI really is disabled on
  Thunder-X1, where the cure is worse than the disease (this regressed
  when we reworked the heterogeneous CPU feature checking).

  Summary:

   - Fix disabling of kpti on Thunder-X machines

   - Fix premature BUILD_BUG_ON() found with randconfig"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: fix vmemmap BUILD_BUG_ON() triggering on !vmemmap setups
  arm64: Check for errata before evaluating cpu features

Revert "MIPS: BCM47XX: Enable 74K Core ExternalSync for PCIe erratum"

This reverts commit 2a027b47dba6 ("MIPS: BCM47XX: Enable 74K Core
ExternalSync for PCIe erratum").

Enabling ExternalSync caused a regression for BCM4718A1 (used e.g. in
Netgear E3000 and ASUS RT-N16): it simply hangs during PCIe
initialization. It's likely that BCM4717A1 is also affected.

I didn't notice that earlier as the only BCM47XX devices with PCIe I
own are:
1) BCM4706 with 2 x 14e4:4331
2) BCM4706 with 14e4:4360 and 14e4:4331
it appears that BCM4706 is unaffected.

While BCM5300X-ES300-RDS.pdf seems to document that erratum and its
workarounds (according to quotes provided by Tokunori) it seems not even
Broadcom follows them.

According to the provided info Broadcom should define CONF7_ES in their
SDK's mipsinc.h and implement workaround in the si_mips_init(). Checking
both didn't reveal such code. It *could* mean Broadcom also had some
problems with the given workaround.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Paul Burton <paul.burton@mips.com>
Reported-by: Michael Marley <michael@michaelmarley.com>
Patchwork: https://patchwork.linux-mips.org/patch/20032/
URL: https://bugs.openwrt.org/index.php?do=details&task_id=1688
Cc: Tokunori Ikegami <ikegami@allied-telesis.co.jp>
Cc: Hauke Mehrtens <hauke@hauke-m.de>
Cc: Chris Packham <chris.packham@alliedtelesis.co.nz>
Cc: James Hogan <jhogan@kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org

Merge tag 'drm-fixes-2018-07-27' of git://anongit.freedesktop.org/drm/drm

Pull drm fixes from Dave Airlie:
"Not much happening this week which is good: two imx display fixes and
  one i915 quirk addition"

* tag 'drm-fixes-2018-07-27' of git://anongit.freedesktop.org/drm/drm:
  drm/i915/glk: Add Quirk for GLK NUC HDMI port issues.
  gpu: ipu-csi: Check for field type alternate
  drm/imx: imx-ldb: check if channel is enabled before printing warning
  drm/imx: imx-ldb: disable LDB on driver bind

Merge branch 'for-linus' of git://git./linux/kernel/git/dtor/input

Pull input fixes from Dmitry Torokhov:

- a couple of new device IDs added to Elan i2c touchpad controller
   driver

- another entry in i8042 reset quirk list

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: i8042 - add Lenovo LaVie Z to the i8042 reset list
  Input: elan_i2c - add another ACPI ID for Lenovo Ideapad 330-15AST
  MAINTAINERS: Add file patterns for serio device tree bindings
  Input: elan_i2c - add ACPI ID for lenovo ideapad 330

Merge tag 'trace-v4.18-rc6' of git://git./linux/kernel/git/rostedt/linux-trace

Pull tracing fixes from Steven Rostedt:
"Various fixes to the tracing infrastructure:

   - Fix double free when the reg() call fails in
     event_trigger_callback()

   - Fix anomoly of snapshot causing tracing_on flag to change

   - Add selftest to test snapshot and tracing_on affecting each other

   - Fix setting of tracepoint flag on error that prevents probes from
     being deleted.

   - Fix another possible double free that is similar to
     event_trigger_callback()

   - Quiet a gcc warning of a false positive unused variable

   - Fix crash of partial exposed task->comm to trace events"

* tag 'trace-v4.18-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  kthread, tracing: Don't expose half-written comm when creating kthreads
  tracing: Quiet gcc warning about maybe unused link variable
  tracing: Fix possible double free in event_enable_trigger_func()
  tracing/kprobes: Fix trace_probe flags on enable_trace_kprobe() failure
  selftests/ftrace: Add snapshot and tracing_on test case
  ring_buffer: tracing: Inherit the tracing setting to next ring buffer
  tracing: Fix double free of event_trigger_data

Merge tag 'xfs-4.18-fixes-4' of git://git./fs/xfs/xfs-linux

Pull xfs fixes from Darrick Wong:

- Fix some uninitialized variable errors

- Fix an incorrect check in metadata verifiers

* tag 'xfs-4.18-fixes-4' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
xfs: properly handle free inodes in extent hint validators
xfs: Initialize variables in xfs_alloc_get_rec before using them

Merge branch 'master' of git://git./linux/kernel/git/klassert/ipsec

Steffen Klassert says:

====================
pull request (net): ipsec 2018-07-27

1) Fix PMTU handling of vti6. We update the PMTU on
   the xfrm dst_entry which is not cached anymore
   after the flowchache removal. So update the
   PMTU of the original dst_entry instead.
   From Eyal Birger.

2) Fix a leak of kernel memory to userspace.
   From Eric Dumazet.

3) Fix a possible dst_entry memleak in xfrm_lookup_route.
   From Tommi Rantala.

4) Fix a skb leak in case we can't call nlmsg_multicast
   from xfrm_nlmsg_multicast. From Florian Westphal.

5) Fix a leak of a temporary buffer in the error path of
   esp6_input. From Zhen Lei.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

block: reset bi_iter.bi_done after splitting bio

After the bio has been updated to represent the remaining sectors, reset
bi_done so bio_rewind_iter() does not rewind further than it should.

This resolves a bio_integrity_process() failure on reads where the
original request was split.

Fixes: 63573e359d05 ("bio-integrity: Restore original iterator on verify stage")
Signed-off-by: Greg Edwards <gedwards@ddn.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

tools/virtio: add kmalloc_array stub

Fixes: 6da2ec56059 ("treewide: kmalloc() -> kmalloc_array()")
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

tools/virtio: add dma barrier stubs

Fixes: 55e49dc43a8 ("virtio_ring: switch to dma_XX barriers for rpmsg")
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

ACPI / LPSS: Avoid PM quirks on suspend and resume from hibernation

Commit a09c59130688 (ACPI / LPSS: Avoid PM quirks on suspend and
resume from S3) modified the ACPI driver for Intel SoCs (LPSS) to
avoid applying PM quirks on suspend and resume from S3 to address
system-wide suspend and resume problems on some systems, but it is
reported that the same issue also affects hibernation, so extend
the approach used by that commit to cover hibernation as well.

Fixes: a09c59130688 (ACPI / LPSS: Avoid PM quirks on suspend and resume from S3)
Link: https://bugs.launchpad.net/bugs/1774950
Reported-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Cc: 4.15+ <stable@vger.kernel.org> # 4.15+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>

net: ena: Fix use of uninitialized DMA address bits field

UBSAN triggers the following undefined behaviour warnings:
[...]
[   13.236124] UBSAN: Undefined behaviour in drivers/net/ethernet/amazon/ena/ena_eth_com.c:468:22
[   13.240043] shift exponent 64 is too large for 64-bit type 'long long unsigned int'
[...]
[   13.744769] UBSAN: Undefined behaviour in drivers/net/ethernet/amazon/ena/ena_eth_com.c:373:4
[   13.748694] shift exponent 64 is too large for 64-bit type 'long long unsigned int'
[...]

When splitting the address to high and low, GENMASK_ULL is used to generate
a bitmask with dma_addr_bits field from io_sq (in ena_com_prepare_tx and
ena_com_add_single_rx_desc).
The problem is that dma_addr_bits is not initialized with a proper value
(besides being cleared in ena_com_create_io_queue).
Assign dma_addr_bits the correct value that is stored in ena_dev when
initializing the SQ.

Fixes: 1738cd3ed342 ("net: ena: Add a driver for Amazon Elastic Network Adapters (ENA)")
Signed-off-by: Gal Pressman <pressmangal@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

kvm, mm: account shadow page tables to kmemcg

The size of kvm's shadow page tables corresponds to the size of the
guest virtual machines on the system. Large VMs can spend a significant
amount of memory as shadow page tables which can not be left as system
memory overhead. So, account shadow page tables to the kmemcg.

[shakeelb@google.com: replace (GFP_KERNEL|__GFP_ACCOUNT) with GFP_KERNEL_ACCOUNT]
Link: http://lkml.kernel.org/r/20180629140224.205849-1-shakeelb@google.com
Link: http://lkml.kernel.org/r/20180627181349.149778-1-shakeelb@google.com
Signed-off-by: Shakeel Butt <shakeelb@google.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Peter Feiner <pfeiner@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

zswap: re-check zswap_is_full() after do zswap_shrink()

/sys/../zswap/stored_pages keeps rising in a zswap test with
"zswap.max_pool_percent=0" parameter.  But it should not compress or
store pages any more since there is no space in the compressed pool.

Reproduce steps:
  1. Boot kernel with "zswap.enabled=1"
  2. Set the max_pool_percent to 0
      # echo 0 > /sys/module/zswap/parameters/max_pool_percent
  3. Do memory stress test to see if some pages have been compressed
      # stress --vm 1 --vm-bytes $mem_available"M" --timeout 60s
  4. Watching the 'stored_pages' number increasing or not

The root cause is:

  When zswap_max_pool_percent is set to 0 via kernel parameter,
  zswap_is_full() will always return true due to zswap_shrink().  But if
  the shinking is able to reclain a page successfully the code then
  proceeds to compressing/storing another page, so the value of
  stored_pages will keep changing.

To solve the issue, this patch adds a zswap_is_full() check again after
  zswap_shrink() to make sure it's now under the max_pool_percent, and to
  not compress/store if we reached the limit.

Link: http://lkml.kernel.org/r/20180530103936.17812-1-liwang@redhat.com
Signed-off-by: Li Wang <liwang@redhat.com>
Acked-by: Dan Streetman <ddstreet@ieee.org>
Cc: Seth Jennings <sjenning@redhat.com>
Cc: Huang Ying <huang.ying.caritas@gmail.com>
Cc: Yu Zhao <yuzhao@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

include/linux/eventfd.h: include linux/errno.h

The new gasket staging driver ran into a randconfig build failure when
CONFIG_EVENTFD is disabled:

  In file included from drivers/staging/gasket/gasket_interrupt.h:11,
                   from drivers/staging/gasket/gasket_interrupt.c:4:
  include/linux/eventfd.h: In function 'eventfd_ctx_fdget':
  include/linux/eventfd.h:51:9: error: implicit declaration of function 'ERR_PTR' [-Werror=implicit-function-declaration]

I can't see anything wrong with including eventfd.h before err.h, so the
easiest fix is to make it possible to do this by including the file
where it is needed.

Link: http://lkml.kernel.org/r/20180724110737.3985088-1-arnd@arndb.de
Fixes: 9a69f5087ccc ("drivers/staging: Gasket driver framework + Apex driver")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Eric Biggers <ebiggers@google.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm: fix vma_is_anonymous() false-positives

vma_is_anonymous() relies on ->vm_ops being NULL to detect anonymous
VMA.  This is unreliable as ->mmap may not set ->vm_ops.

False-positive vma_is_anonymous() may lead to crashes:

next ffff8801ce5e7040 prev ffff8801d20eca50 mm ffff88019c1e13c0
prot 27 anon_vma ffff88019680cdd8 vm_ops 0000000000000000
pgoff 0 file ffff8801b2ec2d00 private_data 0000000000000000
flags: 0xff(read|write|exec|shared|mayread|maywrite|mayexec|mayshare)
------------[ cut here ]------------
kernel BUG at mm/memory.c:1422!
invalid opcode: 0000 [#1] SMP KASAN
CPU: 0 PID: 18486 Comm: syz-executor3 Not tainted 4.18.0-rc3+ #136
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google
01/01/2011
RIP: 0010:zap_pmd_range mm/memory.c:1421 [inline]
RIP: 0010:zap_pud_range mm/memory.c:1466 [inline]
RIP: 0010:zap_p4d_range mm/memory.c:1487 [inline]
RIP: 0010:unmap_page_range+0x1c18/0x2220 mm/memory.c:1508
Call Trace:
unmap_single_vma+0x1a0/0x310 mm/memory.c:1553
zap_page_range_single+0x3cc/0x580 mm/memory.c:1644
unmap_mapping_range_vma mm/memory.c:2792 [inline]
unmap_mapping_range_tree mm/memory.c:2813 [inline]
unmap_mapping_pages+0x3a7/0x5b0 mm/memory.c:2845
unmap_mapping_range+0x48/0x60 mm/memory.c:2880
truncate_pagecache+0x54/0x90 mm/truncate.c:800
truncate_setsize+0x70/0xb0 mm/truncate.c:826
simple_setattr+0xe9/0x110 fs/libfs.c:409
notify_change+0xf13/0x10f0 fs/attr.c:335
do_truncate+0x1ac/0x2b0 fs/open.c:63
do_sys_ftruncate+0x492/0x560 fs/open.c:205
__do_sys_ftruncate fs/open.c:215 [inline]
__se_sys_ftruncate fs/open.c:213 [inline]
__x64_sys_ftruncate+0x59/0x80 fs/open.c:213
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe

Reproducer:

#include <stdio.h>
#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <unistd.h>
#include <fcntl.h>

#define KCOV_INIT_TRACE _IOR('c', 1, unsigned long)
#define KCOV_ENABLE _IO('c', 100)
#define KCOV_DISABLE _IO('c', 101)
#define COVER_SIZE (1024<<10)

#define KCOV_TRACE_PC  0
#define KCOV_TRACE_CMP 1

int main(int argc, char **argv)
{
int fd;
unsigned long *cover;

system("mount -t debugfs none /sys/kernel/debug");
fd = open("/sys/kernel/debug/kcov", O_RDWR);
ioctl(fd, KCOV_INIT_TRACE, COVER_SIZE);
cover = mmap(NULL, COVER_SIZE * sizeof(unsigned long),
PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
munmap(cover, COVER_SIZE * sizeof(unsigned long));
cover = mmap(NULL, COVER_SIZE * sizeof(unsigned long),
PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
memset(cover, 0, COVER_SIZE * sizeof(unsigned long));
ftruncate(fd, 3UL << 20);
return 0;
}

This can be fixed by assigning anonymous VMAs own vm_ops and not relying
on it being NULL.

If ->mmap() failed to set ->vm_ops, mmap_region() will set it to
dummy_vm_ops.  This way we will have non-NULL ->vm_ops for all VMAs.

Link: http://lkml.kernel.org/r/20180724121139.62570-4-kirill.shutemov@linux.intel.com
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reported-by: syzbot+3f84280d52be9b7083cc@syzkaller.appspotmail.com
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Andrea Arcangeli <aarcange@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>

mm: use vma_init() to initialize VMAs on stack and data segments

Make sure to initialize all VMAs properly, not only those which come
from vm_area_cachep.

Link: http://lkml.kernel.org/r/20180724121139.62570-3-kirill.shutemov@linux.intel.com
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Andrea Arcangeli <aarcange@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>

mm: introduce vma_init()

Not all VMAs allocated with vm_area_alloc(). Some of them allocated on
stack or in data segment.

The new helper can be use to initialize VMA properly regardless where it
was allocated.

Link: http://lkml.kernel.org/r/20180724121139.62570-2-kirill.shutemov@linux.intel.com
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Andrea Arcangeli <aarcange@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>

mm: fix exports that inadvertently make put_page() EXPORT_SYMBOL_GPL

Commit e76384884344 ("mm: introduce MEMORY_DEVICE_FS_DAX and
CONFIG_DEV_PAGEMAP_OPS") added two EXPORT_SYMBOL_GPL() symbols, but
these symbols are required by the inlined put_page(), thus accidentally
making put_page() a GPL export only. This breaks OpenAFS (at least).

Mark them EXPORT_SYMBOL() instead.

Link: http://lkml.kernel.org/r/153128611970.2928.11310692420711601254.stgit@dwillia2-desk3.amr.corp.intel.com
Fixes: e76384884344 ("mm: introduce MEMORY_DEVICE_FS_DAX and CONFIG_DEV_PAGEMAP_OPS")
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Reported-by: Joe Gorse <jhgorse@gmail.com>
Reported-by: John Hubbard <jhubbard@nvidia.com>
Tested-by: Joe Gorse <jhgorse@gmail.com>
Tested-by: John Hubbard <jhubbard@nvidia.com>
Cc: Jérôme Glisse <jglisse@redhat.com>
Cc: Mark Vitale <mvitale@sinenomine.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

ipc/sem.c: prevent queue.status tearing in semop

In order for load/store tearing prevention to work, _all_ accesses to
the variable in question need to be done around READ and WRITE_ONCE()
macros. Ensure everyone does so for q->status variable for
semtimedop().

Link: http://lkml.kernel.org/r/20180717052654.676-1-dave@stgolabs.net
Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Cc: Manfred Spraul <manfred@colorfullife.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm: disallow mappings that conflict for devm_memremap_pages()

When pmem namespaces created are smaller than section size, this can
cause an issue during removal and gpf was observed:

  general protection fault: 0000 1 SMP PTI
  CPU: 36 PID: 3941 Comm: ndctl Tainted: G W 4.14.28-1.el7uek.x86_64 #2
  task: ffff88acda150000 task.stack: ffffc900233a4000
  RIP: 0010:__put_page+0x56/0x79
  Call Trace:
    devm_memremap_pages_release+0x155/0x23a
    release_nodes+0x21e/0x260
    devres_release_all+0x3c/0x48
    device_release_driver_internal+0x15c/0x207
    device_release_driver+0x12/0x14
    unbind_store+0xba/0xd8
    drv_attr_store+0x27/0x31
    sysfs_kf_write+0x3f/0x46
    kernfs_fop_write+0x10f/0x18b
    __vfs_write+0x3a/0x16d
    vfs_write+0xb2/0x1a1
    SyS_write+0x55/0xb9
    do_syscall_64+0x79/0x1ae
    entry_SYSCALL_64_after_hwframe+0x3d/0x0

Add code to check whether we have a mapping already in the same section
and prevent additional mappings from being created if that is the case.

Link: http://lkml.kernel.org/r/152909478401.50143.312364396244072931.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Robert Elliott <elliott@hpe.com>
Cc: Jeff Moyer <jmoyer@redhat.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

kasan: only select SLUB_DEBUG with SYSFS=y

Building with KASAN and SLUB but without sysfs now results in a
build-time error:

  WARNING: unmet direct dependencies detected for SLUB_DEBUG
    Depends on [n]: SLUB [=y] && SYSFS [=n]
    Selected by [y]:
    - KASAN [=y] && HAVE_ARCH_KASAN [=y] && (SLUB [=y] || SLAB [=n] && !DEBUG_SLAB [=n]) && SLUB [=y]
  mm/slub.c:4565:12: error: 'list_locations' defined but not used [-Werror=unused-function]
   static int list_locations(struct kmem_cache *s, char *buf,
              ^~~~~~~~~~~~~~
  mm/slub.c:4406:13: error: 'validate_slab_cache' defined but not used [-Werror=unused-function]
   static long validate_slab_cache(struct kmem_cache *s)

This disallows that broken configuration in Kconfig.

Link: http://lkml.kernel.org/r/20180709154019.1693026-1-arnd@arndb.de
Fixes: dd275caf4a0d ("kasan: depend on CONFIG_SLUB_DEBUG")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: "Jason A. Donenfeld" <Jason@zx2c4.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Shakeel Butt <shakeelb@google.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Christoph Lameter <cl@linux.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

delayacct: fix crash in delayacct_blkio_end() after delayacct init failure

While forking, if delayacct init fails due to memory shortage, it
continues expecting all delayacct users to check task->delays pointer
against NULL before dereferencing it, which all of them used to do.

Commit c96f5471ce7d ("delayacct: Account blkio completion on the correct
task"), while updating delayacct_blkio_end() to take the target task
instead of always using %current, made the function test NULL on
%current->delays and then continue to operated on @p->delays.  If
%current succeeded init while @p didn't, it leads to the following
crash.

BUG: unable to handle kernel NULL pointer dereference at 0000000000000004
IP: __delayacct_blkio_end+0xc/0x40
PGD 8000001fd07e1067 P4D 8000001fd07e1067 PUD 1fcffbb067 PMD 0
Oops: 0000 [#1] SMP PTI
CPU: 4 PID: 25774 Comm: QIOThread0 Not tainted 4.16.0-9_fbk1_rc2_1180_g6b593215b4d7 #9
RIP: 0010:__delayacct_blkio_end+0xc/0x40
Call Trace:
  try_to_wake_up+0x2c0/0x600
  autoremove_wake_function+0xe/0x30
  __wake_up_common+0x74/0x120
  wake_up_page_bit+0x9c/0xe0
  mpage_end_io+0x27/0x70
  blk_update_request+0x78/0x2c0
  scsi_end_request+0x2c/0x1e0
  scsi_io_completion+0x20b/0x5f0
  blk_mq_complete_request+0xa2/0x100
  ata_scsi_qc_complete+0x79/0x400
  ata_qc_complete_multiple+0x86/0xd0
  ahci_handle_port_interrupt+0xc9/0x5c0
  ahci_handle_port_intr+0x54/0xb0
  ahci_single_level_irq_intr+0x3b/0x60
  __handle_irq_event_percpu+0x43/0x190
  handle_irq_event_percpu+0x20/0x50
  handle_irq_event+0x2a/0x50
  handle_edge_irq+0x80/0x1c0
  handle_irq+0xaf/0x120
  do_IRQ+0x41/0xc0
  common_interrupt+0xf/0xf

Fix it by updating delayacct_blkio_end() check @p->delays instead.

Link: http://lkml.kernel.org/r/20180724175542.GP1934745@devbig577.frc2.facebook.com
Fixes: c96f5471ce7d ("delayacct: Account blkio completion on the correct task")
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Dave Jones <dsj@fb.com>
Debugged-by: Dave Jones <dsj@fb.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Josh Snyder <joshs@netflix.com>
Cc: <stable@vger.kernel.org> [4.15+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Merge tag 'imx-drm-fixes-2018-07-20' of git://git.pengutronix.de/git/pza/linux into drm-fixes

drm/imx: imx-drm ldb and ipu-v3 csi fixes

- Disable the LVDS Display Bridge (LDB) on driver bind. This is
  necessary to guarantee correct LVDS signals in case the bootloader
  left the LVDS output active.
- Remove false positive warning about disabled second LVDS channel in
  dual-channel mode. In this mode, the second LVDS channel can not be
  used separately. If the second channel is correctly described as
  disabled in the device tree, the driver warned about this anyway.
- Fix the CSI confiuration to not only enable interlaced capture mode
  for V4L2_FIELD_SEQ_BT and V4L2_FIELD_SEQ_TB, but also for the
  V4L2_FIELD_ALTERNATE interlacing mode. Before, it incorrectly tried
  to capture progressive frames in that case.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1532100423.3438.8.camel@pengutronix.de

Merge tag 'drm-intel-fixes-2018-07-26' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes

- Only a quirk for GLK NUC HDMI port issues

Signed-off-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180726163856.GA21162@intel.com

bpf: btf: Use exact btf value_size match in map_check_btf()

The current map_check_btf() in BPF_MAP_TYPE_ARRAY rejects
'> map->value_size' to ensure map_seq_show_elem() will not
access things beyond an array element.

Yonghong suggested that using '!=' is a more correct
check.  The 8 bytes round_up on value_size is stored
in array->elem_size.  Hence, using '!=' on map->value_size
is a proper check.

This patch also adds new tests to check the btf array
key type and value type.  Two of these new tests verify
the btf's value_size (the change in this patch).

It also fixes two existing tests that wrongly encoded
a btf's type size (pprint_test) and the value_type_id (in one
of the raw_tests[]).  However, that do not affect these two
BTF verification tests before or after this test changes.
These two tests mainly failed at array creation time after
this patch.

Fixes: a26ca7c982cb ("bpf: btf: Add pretty print support to the basic arraymap")
Suggested-by: Yonghong Song <yhs@fb.com>
Acked-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

xdp: add NULL pointer check in __xdp_return()

rhashtable_lookup() can return NULL. so that NULL pointer
check routine should be added.

Fixes: 02b55e5657c3 ("xdp: add MEM_TYPE_ZERO_COPY")
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: Björn Töpel <bjorn.topel@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

RDS: RDMA: Fix the NULL-ptr deref in rds_ib_get_mr

Registration of a memory region(MR) through FRMR/fastreg(unlike FMR)
needs a connection/qp. With a proxy qp, this dependency on connection
will be removed, but that needs more infrastructure patches, which is a
work in progress.

As an intermediate fix, the get_mr returns EOPNOTSUPP when connection
details are not populated. The MR registration through sendmsg() will
continue to work even with fast registration, since connection in this
case is formed upfront.

This patch fixes the following crash:
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
Modules linked in:
CPU: 1 PID: 4244 Comm: syzkaller468044 Not tainted 4.16.0-rc6+ #361
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
RIP: 0010:rds_ib_get_mr+0x5c/0x230 net/rds/ib_rdma.c:544
RSP: 0018:ffff8801b059f890 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff8801b07e1300 RCX: ffffffff8562d96e
RDX: 000000000000000d RSI: 0000000000000001 RDI: 0000000000000068
RBP: ffff8801b059f8b8 R08: ffffed0036274244 R09: ffff8801b13a1200
R10: 0000000000000004 R11: ffffed0036274243 R12: ffff8801b13a1200
R13: 0000000000000001 R14: ffff8801ca09fa9c R15: 0000000000000000
FS: 00007f4d050af700(0000) GS:ffff8801db300000(0000)
knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4d050aee78 CR3: 00000001b0d9b006 CR4: 00000000001606e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__rds_rdma_map+0x710/0x1050 net/rds/rdma.c:271
rds_get_mr_for_dest+0x1d4/0x2c0 net/rds/rdma.c:357
rds_setsockopt+0x6cc/0x980 net/rds/af_rds.c:347
SYSC_setsockopt net/socket.c:1849 [inline]
SyS_setsockopt+0x189/0x360 net/socket.c:1828
do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x4456d9
RSP: 002b:00007f4d050aedb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00000000006dac3c RCX: 00000000004456d9
RDX: 0000000000000007 RSI: 0000000000000114 RDI: 0000000000000004
RBP: 00000000006dac38 R08: 00000000000000a0 R09: 0000000000000000
R10: 0000000020000380 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffbfb36d6f R14: 00007f4d050af9c0 R15: 0000000000000005
Code: fa 48 c1 ea 03 80 3c 02 00 0f 85 cc 01 00 00 4c 8b bb 80 04 00 00
48
b8 00 00 00 00 00 fc ff df 49 8d 7f 68 48 89 fa 48 c1 ea 03 <80> 3c 02
00 0f
85 9c 01 00 00 4d 8b 7f 68 48 b8 00 00 00 00 00
RIP: rds_ib_get_mr+0x5c/0x230 net/rds/ib_rdma.c:544 RSP:
ffff8801b059f890
---[ end trace 7e1cea13b85473b0 ]---

Reported-by: syzbot+b51c77ef956678a65834@syzkaller.appspotmail.com
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: Avinash Repaka <avinash.repaka@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: rollback orig value on failure of dev_qdisc_change_tx_queue_len

Fix dev_change_tx_queue_len so it rolls back original value
upon a failure in dev_qdisc_change_tx_queue_len.
This is already done for notifirers' failures, share the code.

In case of failure in dev_qdisc_change_tx_queue_len, some tx queues
would still be of the new length, while they should be reverted.
Currently, the revert is not done, and is marked with a TODO label
in dev_qdisc_change_tx_queue_len, and should find some nice solution
to do it.
Yet it is still better to not apply the newly requested value.

Fixes: 48bfd55e7e41 ("net_sched: plug in qdisc ops change_tx_queue_len")
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Reviewed-by: Eran Ben Elisha <eranbe@mellanox.com>
Reported-by: Ran Rozenstein <ranro@mellanox.com>
Cc: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

block: bio_iov_iter_get_pages: pin more pages for multi-segment IOs

bio_iov_iter_get_pages() currently only adds pages for the next non-zero
segment from the iov_iter to the bio. That's suboptimal for callers,
which typically try to pin as many pages as fit into the bio. This patch
converts the current bio_iov_iter_get_pages() into a static helper, and
introduces a new helper that allocates as many pages as

1) fit into the bio,
2) are present in the iov_iter,
3) and can be pinned by MM.

Error is returned only if zero pages could be pinned. Because of 3), a
zero return value doesn't necessarily mean all pages have been pinned.
Callers that have to pin every page in the iov_iter must still call this
function in a loop (this is currently the case).

This change matters most for __blkdev_direct_IO_simple(), which calls
bio_iov_iter_get_pages() only once. If it obtains less pages than
requested, it returns a "short write" or "short read", and
__generic_file_write_iter() falls back to buffered writes, which may
lead to data corruption.

Fixes: 72ecad22d9f1 ("block: support a full bio worth of IO for simplified bdev direct-io")
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin Wilck <mwilck@suse.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

blkdev: __blkdev_direct_IO_simple: fix leak in error case

Fixes: 72ecad22d9f1 ("block: support a full bio worth of IO for simplified bdev direct-io")
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin Wilck <mwilck@suse.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

block: bio_iov_iter_get_pages: fix size of last iovec

If the last page of the bio is not "full", the length of the last
vector slot needs to be corrected. This slot has the index
(bio->bi_vcnt - 1), but only in bio->bi_io_vec. In the "bv" helper
array, which is shifted by the value of bio->bi_vcnt at function
invocation, the correct index is (nr_pages - 1).

v2: improved readability following suggestions from Ming Lei.
v3: followed a formatting suggestion from Christoph Hellwig.

Fixes: 2cefe4dbaadf ("block: add bio_iov_iter_get_pages()")
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin Wilck <mwilck@suse.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

Merge branch 'nvme-4.18' of git://git.infradead.org/nvme into for-linus

Pull NVMe fixes from Christoph:

"Two small fixes each for the FC code and the target."

* 'nvme-4.18' of git://git.infradead.org/nvme:
  nvmet: only check for filebacking on -ENOTBLK
  nvmet: fixup crash on NULL device path
  nvme: if_ready checks to fail io to deleting controller
  nvmet-fc: fix target sgl list on large transfers

PCI/AER: Work around use-after-free in pcie_do_fatal_recovery()

When an fatal error is received by a non-bridge device, the device is
removed, and pci_stop_and_remove_bus_device() deallocates the device
structure. The freed device structure is used by subsequent code to send
uevents and print messages.

Hold a reference on the device until we're finished using it. This is not
an ideal fix because pcie_do_fatal_recovery() should not use the device at
all after removing it, but that's too big a project for right now.

Fixes: 7e9084b36740 ("PCI/AER: Handle ERR_FATAL with removal and re-enumeration of devices")
Signed-off-by: Thomas Tai <thomas.tai@oracle.com>
[bhelgaas: changelog, reduce get/put coverage]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>