openwrt/staging/blogic.git
4 years agohinic: fix the bug of clearing event queue
Luo bin [Fri, 20 Mar 2020 23:13:17 +0000 (23:13 +0000)]
hinic: fix the bug of clearing event queue

should disable eq irq before freeing it, must clear event queue
depth in hw before freeing relevant memory to avoid illegal
memory access and update consumer idx to avoid invalid interrupt

Signed-off-by: Luo bin <luobin9@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agohinic: fix a bug of waitting for IO stopped
Luo bin [Fri, 20 Mar 2020 23:13:16 +0000 (23:13 +0000)]
hinic: fix a bug of waitting for IO stopped

it's unreliable for fw to check whether IO is stopped, so driver
wait for enough time to ensure IO process is done in hw before
freeing resources

Signed-off-by: Luo bin <luobin9@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agotcp: also NULL skb->dev when copy was needed
Florian Westphal [Fri, 20 Mar 2020 15:52:02 +0000 (16:52 +0100)]
tcp: also NULL skb->dev when copy was needed

In rare cases retransmit logic will make a full skb copy, which will not
trigger the zeroing added in recent change
b738a185beaa ("tcp: ensure skb->dev is NULL before leaving TCP stack").

Cc: Eric Dumazet <edumazet@google.com>
Fixes: 75c119afe14f ("tcp: implement rb-tree based retransmit queue")
Fixes: 28f8bfd1ac94 ("netfilter: Support iif matches in POSTROUTING")
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf
David S. Miller [Sat, 21 Mar 2020 02:34:18 +0000 (19:34 -0700)]
Merge git://git./pub/scm/linux/kernel/git/pablo/nf

Pablo Neira Ayuso says:

====================
Netfilter fixes for net

The following patchset contains Netfilter fixes for net:

1) Refetch IP header pointer after pskb_may_pull() in flowtable,
   from Haishuang Yan.

2) Fix memleak in flowtable offload in nf_flow_table_free(),
   from Paul Blakey.

3) Set control.addr_type mask in flowtable offload, from Edward Cree.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agotcp: ensure skb->dev is NULL before leaving TCP stack
Eric Dumazet [Thu, 19 Mar 2020 19:49:55 +0000 (12:49 -0700)]
tcp: ensure skb->dev is NULL before leaving TCP stack

skb->rbnode is sharing three skb fields : next, prev, dev

When a packet is sent, TCP keeps the original skb (master)
in a rtx queue, which was converted to rbtree a while back.

__tcp_transmit_skb() is responsible to clone the master skb,
and add the TCP header to the clone before sending it
to network layer.

skb_clone() already clears skb->next and skb->prev, but copies
the master oskb->dev into the clone.

We need to clear skb->dev, otherwise lower layers could interpret
the value as a pointer to a netdev.

This old bug surfaced recently when commit 28f8bfd1ac94
("netfilter: Support iif matches in POSTROUTING") was merged.

Before this netfilter commit, skb->dev value was ignored and
changed before reaching dev_queue_xmit()

Fixes: 75c119afe14f ("tcp: implement rb-tree based retransmit queue")
Fixes: 28f8bfd1ac94 ("netfilter: Support iif matches in POSTROUTING")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Martin Zaharinov <micron10@gmail.com>
Cc: Florian Westphal <fw@strlen.de>
Cc: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agocxgb4: fix Txq restart check during backpressure
Rahul Lakkireddy [Thu, 19 Mar 2020 17:38:10 +0000 (23:08 +0530)]
cxgb4: fix Txq restart check during backpressure

Driver reclaims descriptors in much smaller batches, even if hardware
indicates more to reclaim, during backpressure. So, fix the check to
restart the Txq during backpressure, by looking at how many
descriptors hardware had indicated to reclaim, and not on how many
descriptors that driver had actually reclaimed. Once the Txq is
restarted, driver will reclaim even more descriptors when Tx path
is entered again.

Fixes: d429005fdf2c ("cxgb4/cxgb4vf: Add support for SGE doorbell queue timer")
Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agocxgb4: fix throughput drop during Tx backpressure
Rahul Lakkireddy [Thu, 19 Mar 2020 17:38:09 +0000 (23:08 +0530)]
cxgb4: fix throughput drop during Tx backpressure

commit 7c3bebc3d868 ("cxgb4: request the TX CIDX updates to status page")
reverted back to getting Tx CIDX updates via DMA, instead of interrupts,
introduced by commit d429005fdf2c ("cxgb4/cxgb4vf: Add support for SGE
doorbell queue timer")

However, it missed reverting back several code changes where Tx CIDX
updates are not explicitly requested during backpressure when using
interrupt mode. These missed changes cause slow recovery during
backpressure because the corresponding interrupt no longer comes and
hence results in Tx throughput drop.

So, revert back these missed code changes, as well, which will allow
explicitly requesting Tx CIDX updates when backpressure happens.
This enables the corresponding interrupt with Tx CIDX update message
to get generated and hence speed up recovery and restore back
throughput.

Fixes: 7c3bebc3d868 ("cxgb4: request the TX CIDX updates to status page")
Fixes: d429005fdf2c ("cxgb4/cxgb4vf: Add support for SGE doorbell queue timer")
Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: dsa: mt7530: Change the LINK bit to reflect the link status
René van Dorst [Thu, 19 Mar 2020 13:47:56 +0000 (14:47 +0100)]
net: dsa: mt7530: Change the LINK bit to reflect the link status

Andrew reported:

After a number of network port link up/down changes, sometimes the switch
port gets stuck in a state where it thinks it is still transmitting packets
but the cpu port is not actually transmitting anymore. In this state you
will see a message on the console
"mtk_soc_eth 1e100000.ethernet eth0: transmit timed out" and the Tx counter
in ifconfig will be incrementing on virtual port, but not incrementing on
cpu port.

The issue is that MAC TX/RX status has no impact on the link status or
queue manager of the switch. So the queue manager just queues up packets
of a disabled port and sends out pause frames when the queue is full.

Change the LINK bit to reflect the link status.

Fixes: b8f126a8d543 ("net-next: dsa: add dsa support for Mediatek MT7530 switch")
Reported-by: Andrew Smith <andrew.smith@digi.com>
Signed-off-by: René van Dorst <opensource@vdorst.com>
Reviewed-by: Vivien Didelot <vivien.didelot@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge tag 'rxrpc-fixes-20200319' of git://git.kernel.org/pub/scm/linux/kernel/git...
David S. Miller [Fri, 20 Mar 2020 03:28:34 +0000 (20:28 -0700)]
Merge tag 'rxrpc-fixes-20200319' of git://git./linux/kernel/git/dhowells/linux-fs

David Howells says:

====================
rxrpc, afs: Interruptibility fixes

Here are a number of fixes for AF_RXRPC and AFS that make AFS system calls
less interruptible and so less likely to leave the filesystem in an
uncertain state.  There's also a miscellaneous patch to make tracing
consistent.

 (1) Firstly, abstract out the Tx space calculation in sendmsg.  Much the
     same code is replicated in a number of places that subsequent patches
     are going to alter, including adding another copy.

 (2) Fix Tx interruptibility by allowing a kernel service, such as AFS, to
     request that a call be interruptible only when waiting for a call slot
     to become available (ie. the call has not taken place yet) or that a
     call be not interruptible at all (e.g. when we want to do writeback
     and don't want a signal interrupting a VM-induced writeback).

 (3) Increase the minimum delay on MSG_WAITALL for userspace sendmsg() when
     waiting for Tx buffer space as a 2*RTT delay is really small over 10G
     ethernet and a 1 jiffy timeout might be essentially 0 if at the end of
     the jiffy period.

 (4) Fix some tracing output in AFS to make it consistent with rxrpc.

 (5) Make sure aborted asynchronous AFS operations are tidied up properly
     so we don't end up with stuck rxrpc calls.

 (6) Make AFS client calls uninterruptible in the Rx phase.  If we don't
     wait for the reply to be fully gathered, we can't update the local VFS
     state and we end up in an indeterminate state with respect to the
     server.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agomlxsw: pci: Only issue reset when system is ready
Ido Schimmel [Thu, 19 Mar 2020 11:25:39 +0000 (13:25 +0200)]
mlxsw: pci: Only issue reset when system is ready

During initialization the driver issues a software reset command and
then waits for the system status to change back to "ready" state.

However, before issuing the reset command the driver does not check that
the system is actually in "ready" state. On Spectrum-{1,2} systems this
was always the case as the hardware initialization time is very short.
On Spectrum-3 systems this is no longer the case. This results in the
software reset command timing-out and the driver failing to load:

[ 6.347591] mlxsw_spectrum3 0000:06:00.0: Cmd exec timed-out (opcode=40(ACCESS_REG),opcode_mod=0,in_mod=0)
[ 6.358382] mlxsw_spectrum3 0000:06:00.0: Reg cmd access failed (reg_id=9023(mrsr),type=write)
[ 6.368028] mlxsw_spectrum3 0000:06:00.0: cannot register bus device
[ 6.375274] mlxsw_spectrum3: probe of 0000:06:00.0 failed with error -110

Fix this by waiting for the system to become ready both before issuing
the reset command and afterwards. In case of failure, print the last
system status to aid in debugging.

Fixes: da382875c616 ("mlxsw: spectrum: Extend to support Spectrum-3 ASIC")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonetfilter: flowtable: populate addr_type mask
Edward Cree [Thu, 19 Mar 2020 19:37:21 +0000 (19:37 +0000)]
netfilter: flowtable: populate addr_type mask

nf_flow_rule_match() sets control.addr_type in key, so needs to also set
 the corresponding mask.  An exact match is wanted, so mask is all ones.

Fixes: c29f74e0df7a ("netfilter: nf_flow_table: hardware offload support")
Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
4 years agonetfilter: flowtable: Fix flushing of offloaded flows on free
Paul Blakey [Thu, 19 Mar 2020 09:52:25 +0000 (11:52 +0200)]
netfilter: flowtable: Fix flushing of offloaded flows on free

Freeing a flowtable with offloaded flows, the flow are deleted from
hardware but are not deleted from the flow table, leaking them,
and leaving their offload bit on.

Add a second pass of the disabled gc to delete the these flows from
the flow table before freeing it.

Fixes: c29f74e0df7a ("netfilter: nf_flow_table: hardware offload support")
Signed-off-by: Paul Blakey <paulb@mellanox.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
4 years agonetfilter: flowtable: reload ip{v6}h in nf_flow_tuple_ip{v6}
Haishuang Yan [Tue, 17 Mar 2020 02:02:53 +0000 (10:02 +0800)]
netfilter: flowtable: reload ip{v6}h in nf_flow_tuple_ip{v6}

Since pskb_may_pull may change skb->data, so we need to reload ip{v6}h at
the right place.

Fixes: a908fdec3dda ("netfilter: nf_flow_table: move ipv6 offload hook code to nf_flow_table")
Fixes: 7d2086871762 ("netfilter: nf_flow_table: move ipv4 offload hook code to nf_flow_table")
Signed-off-by: Haishuang Yan <yanhaishuang@cmss.chinamobile.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
4 years agonetfilter: flowtable: reload ip{v6}h in nf_flow_nat_ip{v6}
Haishuang Yan [Tue, 17 Mar 2020 02:02:52 +0000 (10:02 +0800)]
netfilter: flowtable: reload ip{v6}h in nf_flow_nat_ip{v6}

Since nf_flow_snat_port and nf_flow_snat_ip{v6} call pskb_may_pull()
which may change skb->data, so we need to reload ip{v6}h at the right
place.

Fixes: a908fdec3dda ("netfilter: nf_flow_table: move ipv6 offload hook code to nf_flow_table")
Fixes: 7d2086871762 ("netfilter: nf_flow_table: move ipv4 offload hook code to nf_flow_table")
Signed-off-by: Haishuang Yan <yanhaishuang@cmss.chinamobile.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
4 years agoMerge branch 'wireguard-fixes'
David S. Miller [Thu, 19 Mar 2020 01:51:43 +0000 (18:51 -0700)]
Merge branch 'wireguard-fixes'

Jason A. Donenfeld says:

====================
wireguard fixes for 5.6-rc7

I originally intended to spend this cycle working on fun optimizations
and architecture for WireGuard for 5.7, but I've been a bit neurotic
about having 5.6 ship without any show stopper bugs. WireGuard has been
stable for a long time now, but that doesn't make me any less nervous
about the real deal in 5.6. To that end, I've been doing code reviews
and having discussions, and we also had a security firm audit the code.
That audit didn't turn up any vulnerabilities, but they did make a good
defense-in-depth suggestion. This series contains:

1) Removal of a duplicated header, from YueHaibing.
2) Testing with 64-bit time in our test suite.
3) Account for skb->protocol==0 due to AF_PACKET sockets, suggested
   by Florian Fainelli.
4) Clean up some code in an unreachable switch/case branch, suggested
   by Florian Fainelli.
5) Better handling of low-order points, discussed with Mathias
   Hall-Andersen.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agowireguard: noise: error out precomputed DH during handshake rather than config
Jason A. Donenfeld [Thu, 19 Mar 2020 00:30:47 +0000 (18:30 -0600)]
wireguard: noise: error out precomputed DH during handshake rather than config

We precompute the static-static ECDH during configuration time, in order
to save an expensive computation later when receiving network packets.
However, not all ECDH computations yield a contributory result. Prior,
we were just not letting those peers be added to the interface. However,
this creates a strange inconsistency, since it was still possible to add
other weird points, like a valid public key plus a low-order point, and,
like points that result in zeros, a handshake would not complete. In
order to make the behavior more uniform and less surprising, simply
allow all peers to be added. Then, we'll error out later when doing the
crypto if there's an issue. This also adds more separation between the
crypto layer and the configuration layer.

Discussed-with: Mathias Hall-Andersen <mathias@hall-andersen.dk>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agowireguard: receive: remove dead code from default packet type case
Jason A. Donenfeld [Thu, 19 Mar 2020 00:30:46 +0000 (18:30 -0600)]
wireguard: receive: remove dead code from default packet type case

The situation in which we wind up hitting the default case here
indicates a major bug in earlier parsing code. It is not a usual thing
that should ever happen, which means a "friendly" message for it doesn't
make sense. Rather, replace this with a WARN_ON, just like we do earlier
in the file for a similar situation, so that somebody sends us a bug
report and we can fix it.

Reported-by: Fabian Freyer <fabianfreyer@radicallyopensecurity.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agowireguard: queueing: account for skb->protocol==0
Jason A. Donenfeld [Thu, 19 Mar 2020 00:30:45 +0000 (18:30 -0600)]
wireguard: queueing: account for skb->protocol==0

We carry out checks to the effect of:

  if (skb->protocol != wg_examine_packet_protocol(skb))
    goto err;

By having wg_skb_examine_untrusted_ip_hdr return 0 on failure, this
means that the check above still passes in the case where skb->protocol
is zero, which is possible to hit with AF_PACKET:

  struct sockaddr_pkt saddr = { .spkt_device = "wg0" };
  unsigned char buffer[5] = { 0 };
  sendto(socket(AF_PACKET, SOCK_PACKET, /* skb->protocol = */ 0),
         buffer, sizeof(buffer), 0, (const struct sockaddr *)&saddr, sizeof(saddr));

Additional checks mean that this isn't actually a problem in the code
base, but I could imagine it becoming a problem later if the function is
used more liberally.

I would prefer to fix this by having wg_examine_packet_protocol return a
32-bit ~0 value on failure, which will never match any value of
skb->protocol, which would simply change the generated code from a mov
to a movzx. However, sparse complains, and adding __force casts doesn't
seem like a good idea, so instead we just add a simple helper function
to check for the zero return value. Since wg_examine_packet_protocol
itself gets inlined, this winds up not adding an additional branch to
the generated code, since the 0 return value already happens in a
mergable branch.

Reported-by: Fabian Freyer <fabianfreyer@radicallyopensecurity.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agowireguard: selftests: test using new 64-bit time_t
Jason A. Donenfeld [Thu, 19 Mar 2020 00:30:44 +0000 (18:30 -0600)]
wireguard: selftests: test using new 64-bit time_t

In case this helps expose bugs with the newer 64-bit time_t types, we do
our testing with the newer musl that supports this as well as
CONFIG_COMPAT_32BIT_TIME=n. This matters to us, since wireguard does in
fact deal with timestamps.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agowireguard: selftests: remove duplicated include <sys/types.h>
YueHaibing [Thu, 19 Mar 2020 00:30:43 +0000 (18:30 -0600)]
wireguard: selftests: remove duplicated include <sys/types.h>

This commit removes a duplicated include.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agovxlan: check return value of gro_cells_init()
Taehee Yoo [Wed, 18 Mar 2020 13:28:09 +0000 (13:28 +0000)]
vxlan: check return value of gro_cells_init()

gro_cells_init() returns error if memory allocation is failed.
But the vxlan module doesn't check the return value of gro_cells_init().

Fixes: 58ce31cca1ff ("vxlan: GRO support at tunnel layer")`
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet/sched: act_ct: Fix leak of ct zone template on replace
Paul Blakey [Wed, 18 Mar 2020 10:50:33 +0000 (12:50 +0200)]
net/sched: act_ct: Fix leak of ct zone template on replace

Currently, on replace, the previous action instance params
is swapped with a newly allocated params. The old params is
only freed (via kfree_rcu), without releasing the allocated
ct zone template related to it.

Call tcf_ct_params_free (via call_rcu) for the old params,
so it will release it.

Fixes: b57dc7c13ea9 ("net/sched: Introduce action ct")
Signed-off-by: Paul Blakey <paulb@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: core: dev.c: fix a documentation warning
Mauro Carvalho Chehab [Tue, 17 Mar 2020 14:54:20 +0000 (15:54 +0100)]
net: core: dev.c: fix a documentation warning

There's a markup for link with is "foo_". On this kernel-doc
comment, we don't want this, but instead, place a literal
reference. So, escape the literal with ``foo``, in order to
avoid this warning:

./net/core/dev.c:5195: WARNING: Unknown target name: "page_is".

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: phy: sfp-bus.c: get rid of docs warnings
Mauro Carvalho Chehab [Tue, 17 Mar 2020 14:54:19 +0000 (15:54 +0100)]
net: phy: sfp-bus.c: get rid of docs warnings

The indentation for the returned values are weird, causing those
warnings:

./drivers/net/phy/sfp-bus.c:579: WARNING: Unexpected indentation.
./drivers/net/phy/sfp-bus.c:619: WARNING: Unexpected indentation.

Use a list and change the identation for it to be properly
parsed by the documentation toolchain.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch 'ENA-driver-bug-fixes'
David S. Miller [Wed, 18 Mar 2020 04:24:23 +0000 (21:24 -0700)]
Merge branch 'ENA-driver-bug-fixes'

Arthur Kiyanovski says:

====================
ENA driver bug fixes
====================

Acked-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: ena: fix continuous keep-alive resets
Arthur Kiyanovski [Tue, 17 Mar 2020 07:06:42 +0000 (09:06 +0200)]
net: ena: fix continuous keep-alive resets

last_keep_alive_jiffies is updated in probe and when a keep-alive
event is received.  In case the driver times-out on a keep-alive event,
it has high chances of continuously timing-out on keep-alive events.
This is because when the driver recovers from the keep-alive-timeout reset
the value of last_keep_alive_jiffies is very old, and if a keep-alive
event is not received before the next timer expires, the value of
last_keep_alive_jiffies will cause another keep-alive-timeout reset
and so forth in a loop.

Solution:
Update last_keep_alive_jiffies whenever the device is restored after
reset.

Fixes: 1738cd3ed342 ("net: ena: Add a driver for Amazon Elastic Network Adapters (ENA)")
Signed-off-by: Noam Dagan <ndagan@amazon.com>
Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: ena: avoid memory access violation by validating req_id properly
Arthur Kiyanovski [Tue, 17 Mar 2020 07:06:41 +0000 (09:06 +0200)]
net: ena: avoid memory access violation by validating req_id properly

Rx req_id is an index in struct ena_eth_io_rx_cdesc_base.
The driver should validate that the Rx req_id it received from
the device is in range [0, ring_size -1].  Failure to do so could
yield to potential memory access violoation.
The validation was mistakenly done when refilling
the Rx submission queue and not in Rx completion queue.

Fixes: ad974baef2a1 ("net: ena: add support for out of order rx buffers refill")
Signed-off-by: Noam Dagan <ndagan@amazon.com>
Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: ena: fix request of incorrect number of IRQ vectors
Arthur Kiyanovski [Tue, 17 Mar 2020 07:06:40 +0000 (09:06 +0200)]
net: ena: fix request of incorrect number of IRQ vectors

Bug:
In short the main issue is caused by the fact that the number of queues
is changed using ethtool after ena_probe() has been called and before
ena_up() was executed. Here is the full scenario in detail:

* ena_probe() is called when the driver is loaded, the driver is not up
  yet at the end of ena_probe().
* The number of queues is changed -> io_queue_count is changed as well -
  ena_up() is not called since the "dev_was_up" boolean in
  ena_update_queue_count() is false.
* ena_up() is called by the kernel (it's called asynchronously some
  time after ena_probe()). ena_setup_io_intr() is called by ena_up() and
  it uses io_queue_count to get the suitable irq lines for each msix
  vector. The function ena_request_io_irq() is called right after that
  and it uses msix_vecs - This value only changes during ena_probe() and
  ena_restore() - to request the irq vectors. This results in "Failed to
  request I/O IRQ" error for i > io_queue_count.

Numeric example:
* After ena_probe() io_queue_count = 8, msix_vecs = 9.
* The number of queues changes to 4 -> io_queue_count = 4, msix_vecs = 9.
* ena_up() is executed for the first time:
  ** ena_setup_io_intr() inits the vectors only up to io_queue_count.
  ** ena_request_io_irq() calls request_irq() and fails for i = 5.

How to reproduce:
simply run the following commands:
    sudo rmmod ena && sudo insmod ena.ko;
    sudo ethtool -L eth1 combined 3;

Fix:
Use ENA_MAX_MSIX_VEC(adapter->num_io_queues + adapter->xdp_num_queues)
instead of adapter->msix_vecs. We need to take XDP queues into
consideration as they need to have msix vectors assigned to them as well.
Note that the XDP cannot be attached before the driver is up and running
but in XDP mode the issue might occur when the number of queues changes
right after a reset trigger.
The ENA_MAX_MSIX_VEC simply adds one to the argument since the first msix
vector is reserved for management queue.

Fixes: 1738cd3ed342 ("net: ena: Add a driver for Amazon Elastic Network Adapters (ENA)")
Signed-off-by: Sameeh Jubran <sameehj@amazon.com>
Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: ena: fix incorrect setting of the number of msix vectors
Arthur Kiyanovski [Tue, 17 Mar 2020 07:06:39 +0000 (09:06 +0200)]
net: ena: fix incorrect setting of the number of msix vectors

Overview:
We don't frequently change the msix vectors throughout the life cycle of
the driver. We do so in two functions: ena_probe() and ena_restore().
ena_probe() is only called when the driver is loaded. ena_restore() on the
other hand is called during device reset / resume operations.

We use num_io_queues for calculating and allocating the number of msix
vectors. At ena_probe() this value is equal to max_num_io_queues and thus
this is not an issue, however ena_restore() might be called after the
number of io queues has changed.

A possible bug scenario is as follows:

* Change number of queues from 8 to 4.
  (num_io_queues = 4, max_num_io_queues = 8, msix_vecs = 9,)
* Trigger reset occurs -> ena_restore is called.
  (num_io_queues = 4, max_num_io_queues =8 , msix_vecs = 5)
* Change number of queues from 4 to 6.
  (num_io_queues = 6, max_num_io_queues = 8, msix_vecs = 5)
* The driver will reset due to failure of check_for_rx_interrupt_queue()

Fix:
This can be easily fixed by always using max_num_io_queues to init the
msix_vecs, since this number won't change as opposed to num_io_queues.

Fixes: 4d19266022ec ("net: ena: multiple queue creation related cleanups")
Signed-off-by: Sameeh Jubran <sameehj@amazon.com>
Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: phy: mdio-mux-bcm-iproc: check clk_prepare_enable() return value
Rayagonda Kokatanur [Tue, 17 Mar 2020 04:54:35 +0000 (10:24 +0530)]
net: phy: mdio-mux-bcm-iproc: check clk_prepare_enable() return value

Check clk_prepare_enable() return value.

Fixes: 2c7230446bc9 ("net: phy: Add pm support to Broadcom iProc mdio mux driver")
Signed-off-by: Rayagonda Kokatanur <rayagonda.kokatanur@broadcom.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch 'net-bcmgenet-revisit-MAC-reset'
David S. Miller [Wed, 18 Mar 2020 04:00:15 +0000 (21:00 -0700)]
Merge branch 'net-bcmgenet-revisit-MAC-reset'

Doug Berger says:

====================
net: bcmgenet: revisit MAC reset

Commit 3a55402c9387 ("net: bcmgenet: use RGMII loopback for MAC
reset") was intended to resolve issues with reseting the UniMAC
core within the GENET block by providing better control over the
clocks used by the UniMAC core. Unfortunately, it is not
compatible with all of the supported system configurations so an
alternative method must be applied.

This commit set provides such an alternative. The first commit
reverts the previous change and the second commit provides the
alternative reset sequence that addresses the concerns observed
with the previous implementation.

This replacement implementation should be applied to the stable
branches wherever commit 3a55402c9387 ("net: bcmgenet: use RGMII
loopback for MAC reset") has been applied.

Unfortunately, reverting that commit may conflict with some
restructuring changes introduced by commit 4f8d81b77e66 ("net:
bcmgenet: Refactor register access in bcmgenet_mii_config").
The first commit in this set has been manually edited to
resolve the conflict on net/master. I would be happy to help
stable maintainers with resolving any such conflicts if they
occur. However, I do not expect that commit to have been
backported to stable branch so hopefully the revert can be
applied cleanly.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: bcmgenet: keep MAC in reset until PHY is up
Doug Berger [Mon, 16 Mar 2020 21:44:56 +0000 (14:44 -0700)]
net: bcmgenet: keep MAC in reset until PHY is up

As noted in commit 28c2d1a7a0bf ("net: bcmgenet: enable loopback
during UniMAC sw_reset") the UniMAC must be clocked at least 5
cycles while the sw_reset is asserted to ensure a clean reset.

That commit enabled local loopback to provide an Rx clock from the
GENET sourced Tx clk. However, when connected in MII mode the Tx
clk is sourced by the PHY so if an EPHY is not supplying clocks
(e.g. when the link is down) the UniMAC does not receive the
necessary clocks.

This commit extends the sw_reset window until the PHY reports that
the link is up thereby ensuring that the clocks are being provided
to the MAC to produce a clean reset.

One consequence is that if the system attempts to enter a Wake on
LAN suspend state when the PHY link has not been active the MAC
may not have had a chance to initialize cleanly. In this case, we
remove the sw_reset and enable the WoL reception path as normal
with the hope that the PHY will provide the necessary clocks to
drive the WoL blocks if the link becomes active after the system
has entered suspend.

Fixes: 1c1008c793fa ("net: bcmgenet: add main driver file")
Signed-off-by: Doug Berger <opendmb@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoRevert "net: bcmgenet: use RGMII loopback for MAC reset"
Doug Berger [Mon, 16 Mar 2020 21:44:55 +0000 (14:44 -0700)]
Revert "net: bcmgenet: use RGMII loopback for MAC reset"

This reverts commit 3a55402c93877d291b0a612d25edb03d1b4b93ac.

This is not a good solution when connecting to an external switch
that may not support the isolation of the TXC signal resulting in
output driver contention on the pin.

A different solution is necessary.

Signed-off-by: Doug Berger <opendmb@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch 'net-mvmdio-avoid-error-message-for-optional-IRQ'
David S. Miller [Wed, 18 Mar 2020 03:54:37 +0000 (20:54 -0700)]
Merge branch 'net-mvmdio-avoid-error-message-for-optional-IRQ'

Chris Packham says:

====================
net: mvmdio: avoid error message for optional IRQ

I've gone ahead an sent a revert. This is the same as the original v1 except
I've added Andrew's review to the commit message.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: mvmdio: avoid error message for optional IRQ
Chris Packham [Mon, 16 Mar 2020 07:49:07 +0000 (20:49 +1300)]
net: mvmdio: avoid error message for optional IRQ

Per the dt-binding the interrupt is optional so use
platform_get_irq_optional() instead of platform_get_irq(). Since
commit 7723f4c5ecdb ("driver core: platform: Add an error message to
platform_get_irq*()") platform_get_irq() produces an error message

  orion-mdio f1072004.mdio: IRQ index 0 not found

which is perfectly normal if one hasn't specified the optional property
in the device tree.

Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoRevert "net: mvmdio: avoid error message for optional IRQ"
Chris Packham [Mon, 16 Mar 2020 07:49:06 +0000 (20:49 +1300)]
Revert "net: mvmdio: avoid error message for optional IRQ"

This reverts commit e1f550dc44a4d535da4e25ada1b0eaf8f3417929.
platform_get_irq_optional() will still return -ENXIO when no interrupt
is provided so the additional error handling caused the driver prone to
fail when no interrupt was specified. Revert the change so we can apply
the correct minimal fix.

Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: ip_gre: Accept IFLA_INFO_DATA-less configuration
Petr Machata [Mon, 16 Mar 2020 17:53:00 +0000 (19:53 +0200)]
net: ip_gre: Accept IFLA_INFO_DATA-less configuration

The fix referenced below causes a crash when an ERSPAN tunnel is created
without passing IFLA_INFO_DATA. Fix by validating passed-in data in the
same way as ipgre does.

Fixes: e1f8f78ffe98 ("net: ip_gre: Separate ERSPAN newlink / changelink callbacks")
Reported-by: syzbot+1b4ebf4dae4e510dd219@syzkaller.appspotmail.com
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: mvneta: Fix the case where the last poll did not process all rx
Jisheng Zhang [Mon, 16 Mar 2020 14:56:36 +0000 (22:56 +0800)]
net: mvneta: Fix the case where the last poll did not process all rx

For the case where the last mvneta_poll did not process all
RX packets, we need to xor the pp->cause_rx_tx or port->cause_rx_tx
before claculating the rx_queue.

Fixes: 2dcf75e2793c ("net: mvneta: Associate RX queues with each CPU")
Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: vxge: fix wrong __VA_ARGS__ usage
Zheng Wei [Mon, 16 Mar 2020 14:23:47 +0000 (22:23 +0800)]
net: vxge: fix wrong __VA_ARGS__ usage

printk in macro vxge_debug_ll uses __VA_ARGS__ without "##" prefix,
it causes a build error when there is no variable
arguments(e.g. only fmt is specified.).

Signed-off-by: Zheng Wei <wei.zheng@vivo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch 'QorIQ-DPAA-ARM-RDBs-need-internal-delay-on-RGMII'
David S. Miller [Mon, 16 Mar 2020 21:58:33 +0000 (14:58 -0700)]
Merge branch 'QorIQ-DPAA-ARM-RDBs-need-internal-delay-on-RGMII'

Madalin Bucur says:

====================
QorIQ DPAA ARM RDBs need internal delay on RGMII

v2: used phy_interface_mode_is_rgmii() to identify RGMII

The QorIQ DPAA 1 based RDB boards require internal delay on
both Tx and Rx to be set. The patch set ensures all RGMII
modes are treated correctly by the FMan driver and sets the
phy-connection-type to "rgmii-id" to restore functionality.
Previously Rx internal delay was set by board pull-ups and
was left untouched by the PHY driver. Since commit
1b3047b5208a80 ("net: phy: realtek: add support for
configuring the RX delay on RTL8211F") the Realtek 8211F PHY
driver has control over the RGMII RX delay and it is
disabling it for other modes than RGMII_RXID and RGMII_ID.

Please note that u-boot in particular performs a fix-up of
the PHY connection type and will overwrite the values from
the Linux device tree. Another patch set was sent for u-boot
and one needs to apply that [1] to the boot loader, to ensure
this fix is complete, unless a different bootloader is used.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoarm64: dts: ls1046ardb: set RGMII interfaces to RGMII_ID mode
Madalin Bucur [Mon, 16 Mar 2020 12:05:58 +0000 (14:05 +0200)]
arm64: dts: ls1046ardb: set RGMII interfaces to RGMII_ID mode

The correct setting for the RGMII ports on LS1046ARDB is to
enable delay on both Rx and Tx so the interface mode used must
be PHY_INTERFACE_MODE_RGMII_ID.

Since commit 1b3047b5208a80 ("net: phy: realtek: add support for
configuring the RX delay on RTL8211F") the Realtek 8211F PHY driver
has control over the RGMII RX delay and it is disabling it for
RGMII_TXID. The LS1046ARDB uses two such PHYs in RGMII_ID mode but
in the device tree the mode was described as "rgmii".

Changing the phy-connection-type to "rgmii-id" to address the issue.

Fixes: 3fa395d2c48a ("arm64: dts: add LS1046A DPAA FMan nodes")
Signed-off-by: Madalin Bucur <madalin.bucur@oss.nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoarm64: dts: ls1043a-rdb: correct RGMII delay mode to rgmii-id
Madalin Bucur [Mon, 16 Mar 2020 12:05:57 +0000 (14:05 +0200)]
arm64: dts: ls1043a-rdb: correct RGMII delay mode to rgmii-id

The correct setting for the RGMII ports on LS1043ARDB is to
enable delay on both Rx and Tx so the interface mode used must
be PHY_INTERFACE_MODE_RGMII_ID.

Since commit 1b3047b5208a80 ("net: phy: realtek: add support for
configuring the RX delay on RTL8211F") the Realtek 8211F PHY driver
has control over the RGMII RX delay and it is disabling it for
RGMII_TXID. The LS1043ARDB uses two such PHYs in RGMII_ID mode but
in the device tree the mode was described as "rgmii_txid".
This issue was not apparent at the time as the PHY driver took the
same action for RGMII_TXID and RGMII_ID back then but it became
visible (RX no longer working) after the above patch.

Changing the phy-connection-type to "rgmii-id" to address the issue.

Fixes: bf02f2ffe59c ("arm64: dts: add LS1043A DPAA FMan support")
Signed-off-by: Madalin Bucur <madalin.bucur@oss.nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: fsl/fman: treat all RGMII modes in memac_adjust_link()
Madalin Bucur [Mon, 16 Mar 2020 12:05:56 +0000 (14:05 +0200)]
net: fsl/fman: treat all RGMII modes in memac_adjust_link()

Treat all internal delay variants the same as RGMII.

Signed-off-by: Madalin Bucur <madalin.bucur@oss.nxp.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch 'ethtool-fail-with-error-if-request-has-unknown-flags'
David S. Miller [Mon, 16 Mar 2020 09:04:24 +0000 (02:04 -0700)]
Merge branch 'ethtool-fail-with-error-if-request-has-unknown-flags'

Michal Kubecek says:

====================
ethtool: fail with error if request has unknown flags

Jakub Kicinski pointed out that if unrecognized flags are set in netlink
header request, kernel shoud fail with an error rather than silently
ignore them so that we have more freedom in future flags semantics.

To help userspace with handling such errors, inform the client which
flags are supported by kernel. For that purpose, we need to allow
passing cookies as part of extack also in case of error (they can be
only passed on success now).
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoethtool: reject unrecognized request flags
Michal Kubecek [Sun, 15 Mar 2020 17:17:53 +0000 (18:17 +0100)]
ethtool: reject unrecognized request flags

As pointed out by Jakub Kicinski, we ethtool netlink code should respond
with an error if request head has flags set which are not recognized by
kernel, either as a mistake or because it expects functionality introduced
in later kernel versions.

To avoid unnecessary roundtrips, use extack cookie to provide the
information about supported request flags.

Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonetlink: add nl_set_extack_cookie_u32()
Michal Kubecek [Sun, 15 Mar 2020 17:17:48 +0000 (18:17 +0100)]
netlink: add nl_set_extack_cookie_u32()

Similar to existing nl_set_extack_cookie_u64(), add new helper
nl_set_extack_cookie_u32() which sets extack cookie to a u32 value.

Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonetlink: allow extack cookie also for error messages
Michal Kubecek [Sun, 15 Mar 2020 17:17:43 +0000 (18:17 +0100)]
netlink: allow extack cookie also for error messages

Commit ba0dc5f6e0ba ("netlink: allow sending extended ACK with cookie on
success") introduced a cookie which can be sent to userspace as part of
extended ack message in the form of NLMSGERR_ATTR_COOKIE attribute.
Currently the cookie is ignored if error code is non-zero but there is
no technical reason for such limitation and it can be useful to provide
machine parseable information as part of an error message.

Include NLMSGERR_ATTR_COOKIE whenever the cookie has been set,
regardless of error code.

Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet_sched: cls_route: remove the right filter from hashtable
Cong Wang [Sat, 14 Mar 2020 05:29:54 +0000 (22:29 -0700)]
net_sched: cls_route: remove the right filter from hashtable

route4_change() allocates a new filter and copies values from
the old one. After the new filter is inserted into the hash
table, the old filter should be removed and freed, as the final
step of the update.

However, the current code mistakenly removes the new one. This
looks apparently wrong to me, and it causes double "free" and
use-after-free too, as reported by syzbot.

Reported-and-tested-by: syzbot+f9b32aaacd60305d9687@syzkaller.appspotmail.com
Reported-and-tested-by: syzbot+2f8c233f131943d6056d@syzkaller.appspotmail.com
Reported-and-tested-by: syzbot+9c2df9fd5e9445b74e01@syzkaller.appspotmail.com
Fixes: 1109c00547fc ("net: sched: RCU cls_route")
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch 'hsr-fix-several-bugs-in-generic-netlink-callback'
David S. Miller [Mon, 16 Mar 2020 08:46:10 +0000 (01:46 -0700)]
Merge branch 'hsr-fix-several-bugs-in-generic-netlink-callback'

Taehee Yoo says:

====================
hsr: fix several bugs in generic netlink callback

This patchset is to fix several bugs they are related in
generic netlink callback in hsr module.

1. The first patch is to add missing rcu_read_lock() in
hsr_get_node_{list/status}().
The hsr_get_node_{list/status}() are not protected by RTNL because
they are callback functions of generic netlink.
But it calls __dev_get_by_index() without acquiring RTNL.
So, it would use unsafe data.

2. The second patch is to avoid failure of hsr_get_node_list().
hsr_get_node_list() is a callback of generic netlink and
it is used to get node information in userspace.
But, if there are so many nodes, it fails because of buffer size.
So, in this patch, restart routine is added.

3. The third patch is to set .netnsok flag to true.
If .netnsok flag is false, non-init_net namespace is not allowed to
operate generic netlink operations.
So, currently, non-init_net namespace has no way to get node information
because .netnsok is false in the current hsr code.

Change log:
v1->v2:
 - Preserve reverse christmas tree variable ordering in the second patch.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agohsr: set .netnsok flag
Taehee Yoo [Fri, 13 Mar 2020 06:50:33 +0000 (06:50 +0000)]
hsr: set .netnsok flag

The hsr module has been supporting the list and status command.
(HSR_C_GET_NODE_LIST and HSR_C_GET_NODE_STATUS)
These commands send node information to the user-space via generic netlink.
But, in the non-init_net namespace, these commands are not allowed
because .netnsok flag is false.
So, there is no way to get node information in the non-init_net namespace.

Fixes: f421436a591d ("net/hsr: Add support for the High-availability Seamless Redundancy protocol (HSRv0)")
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agohsr: add restart routine into hsr_get_node_list()
Taehee Yoo [Fri, 13 Mar 2020 06:50:24 +0000 (06:50 +0000)]
hsr: add restart routine into hsr_get_node_list()

The hsr_get_node_list() is to send node addresses to the userspace.
If there are so many nodes, it could fail because of buffer size.
In order to avoid this failure, the restart routine is added.

Fixes: f421436a591d ("net/hsr: Add support for the High-availability Seamless Redundancy protocol (HSRv0)")
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agohsr: use rcu_read_lock() in hsr_get_node_{list/status}()
Taehee Yoo [Fri, 13 Mar 2020 06:50:14 +0000 (06:50 +0000)]
hsr: use rcu_read_lock() in hsr_get_node_{list/status}()

hsr_get_node_{list/status}() are not under rtnl_lock() because
they are callback functions of generic netlink.
But they use __dev_get_by_index() without rtnl_lock().
So, it would use unsafe data.
In order to fix it, rcu_read_lock() and dev_get_by_index_rcu()
are used instead of __dev_get_by_index().

Fixes: f421436a591d ("net/hsr: Add support for the High-availability Seamless Redundancy protocol (HSRv0)")
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch 'net-Use-scnprintf-for-avoiding-potential-buffer-overflow'
David S. Miller [Mon, 16 Mar 2020 00:06:22 +0000 (17:06 -0700)]
Merge branch 'net-Use-scnprintf-for-avoiding-potential-buffer-overflow'

Takashi Iwai says:

====================
net: Use scnprintf() for avoiding potential buffer overflow

here is a respin of trivial patch series just to convert suspicious
snprintf() usages with the more safer one, scnprintf().

v1->v2: Align the remaining lines to the open parenthesis
        Excluded i40e patch that was already queued
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: netdevsim: Use scnprintf() for avoiding potential buffer overflow
Takashi Iwai [Sun, 15 Mar 2020 09:35:03 +0000 (10:35 +0100)]
net: netdevsim: Use scnprintf() for avoiding potential buffer overflow

Since snprintf() returns the would-be-output size instead of the
actual output size, the succeeding calls may go beyond the given
buffer limit.  Fix it by replacing with scnprintf().

Cc: "David S . Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: netdev@vger.kernel.org
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: sfc: Use scnprintf() for avoiding potential buffer overflow
Takashi Iwai [Sun, 15 Mar 2020 09:35:02 +0000 (10:35 +0100)]
net: sfc: Use scnprintf() for avoiding potential buffer overflow

Since snprintf() returns the would-be-output size instead of the
actual output size, the succeeding calls may go beyond the given
buffer limit.  Fix it by replacing with scnprintf().

Cc: "David S . Miller" <davem@davemloft.net>
Cc: Edward Cree <ecree@solarflare.com>
Cc: Martin Habets <mhabets@solarflare.com>
Cc: Solarflare linux maintainers <linux-net-drivers@solarflare.com>
Cc: netdev@vger.kernel.org
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: ionic: Use scnprintf() for avoiding potential buffer overflow
Takashi Iwai [Sun, 15 Mar 2020 09:35:01 +0000 (10:35 +0100)]
net: ionic: Use scnprintf() for avoiding potential buffer overflow

Since snprintf() returns the would-be-output size instead of the
actual output size, the succeeding calls may go beyond the given
buffer limit.  Fix it by replacing with scnprintf().

Reviewed-by: Simon Horman <simon.horman@netronome.com>
Acked-by: Shannon Nelson <snelson@pensando.io>
Cc: "David S . Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: oss-drivers@netronome.com
Cc: netdev@vger.kernel.org
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: nfp: Use scnprintf() for avoiding potential buffer overflow
Takashi Iwai [Sun, 15 Mar 2020 09:35:00 +0000 (10:35 +0100)]
net: nfp: Use scnprintf() for avoiding potential buffer overflow

Since snprintf() returns the would-be-output size instead of the
actual output size, the succeeding calls may go beyond the given
buffer limit.  Fix it by replacing with scnprintf().

Reviewed-by: Simon Horman <simon.horman@netronome.com>
Cc: "David S . Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: oss-drivers@netronome.com
To: netdev@vger.kernel.org
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: mlx4: Use scnprintf() for avoiding potential buffer overflow
Takashi Iwai [Sun, 15 Mar 2020 09:34:59 +0000 (10:34 +0100)]
net: mlx4: Use scnprintf() for avoiding potential buffer overflow

Since snprintf() returns the would-be-output size instead of the
actual output size, the succeeding calls may go beyond the given
buffer limit.  Fix it by replacing with scnprintf().

Cc: "David S . Miller" <davem@davemloft.net>
Cc: Tariq Toukan <tariqt@mellanox.com>
To: netdev@vger.kernel.org
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: caif: Use scnprintf() for avoiding potential buffer overflow
Takashi Iwai [Sun, 15 Mar 2020 09:34:58 +0000 (10:34 +0100)]
net: caif: Use scnprintf() for avoiding potential buffer overflow

Since snprintf() returns the would-be-output size instead of the
actual output size, the succeeding calls may go beyond the given
buffer limit.  Fix it by replacing with scnprintf().

Cc: "David S . Miller" <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agomlxsw: reg: Increase register field length to 31 bits
Ido Schimmel [Sun, 15 Mar 2020 08:07:35 +0000 (10:07 +0200)]
mlxsw: reg: Increase register field length to 31 bits

The cited commit set a value of 2^31-1 in order to "disable" the shaper
on a given a port. However, the length of the maximum shaper rate field
was not updated from 28 bits to 31 bits, which means ports are still
limited to ~268Gbps despite supporting speeds of 400Gbps.

Fix this by increasing the field's length.

Fixes: 92afbfedb77d ("mlxsw: reg: Increase MLXSW_REG_QEEC_MAS_DIS")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agogeneve: move debug check after netdev unregister
Florian Westphal [Sat, 14 Mar 2020 07:18:42 +0000 (08:18 +0100)]
geneve: move debug check after netdev unregister

The debug check must be done after unregister_netdevice_many() call --
the list_del() for this is done inside .ndo_stop.

Fixes: 2843a25348f8 ("geneve: speedup geneve tunnels dismantle")
Reported-and-tested-by: <syzbot+68a8ed58e3d17c700de5@syzkaller.appspotmail.com>
Cc: Haishuang Yan <yanhaishuang@cmss.chinamobile.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet/packet: tpacket_rcv: avoid a producer race condition
Willem de Bruijn [Fri, 13 Mar 2020 16:18:09 +0000 (12:18 -0400)]
net/packet: tpacket_rcv: avoid a producer race condition

PACKET_RX_RING can cause multiple writers to access the same slot if a
fast writer wraps the ring while a slow writer is still copying. This
is particularly likely with few, large, slots (e.g., GSO packets).

Synchronize kernel thread ownership of rx ring slots with a bitmap.

Writers acquire a slot race-free by testing tp_status TP_STATUS_KERNEL
while holding the sk receive queue lock. They release this lock before
copying and set tp_status to TP_STATUS_USER to release to userspace
when done. During copying, another writer may take the lock, also see
TP_STATUS_KERNEL, and start writing to the same slot.

Introduce a new rx_owner_map bitmap with a bit per slot. To acquire a
slot, test and set with the lock held. To release race-free, update
tp_status and owner bit as a transaction, so take the lock again.

This is the one of a variety of discussed options (see Link below):

* instead of a shadow ring, embed the data in the slot itself, such as
in tp_padding. But any test for this field may match a value left by
userspace, causing deadlock.

* avoid the lock on release. This leaves a small race if releasing the
shadow slot before setting TP_STATUS_USER. The below reproducer showed
that this race is not academic. If releasing the slot after tp_status,
the race is more subtle. See the first link for details.

* add a new tp_status TP_KERNEL_OWNED to avoid the transactional store
of two fields. But, legacy applications may interpret all non-zero
tp_status as owned by the user. As libpcap does. So this is possible
only opt-in by newer processes. It can be added as an optional mode.

* embed the struct at the tail of pg_vec to avoid extra allocation.
The implementation proved no less complex than a separate field.

The additional locking cost on release adds contention, no different
than scaling on multicore or multiqueue h/w. In practice, below
reproducer nor small packet tcpdump showed a noticeable change in
perf report in cycles spent in spinlock. Where contention is
problematic, packet sockets support mitigation through PACKET_FANOUT.
And we can consider adding opt-in state TP_KERNEL_OWNED.

Easy to reproduce by running multiple netperf or similar TCP_STREAM
flows concurrently with `tcpdump -B 129 -n greater 60000`.

Based on an earlier patchset by Jon Rosen. See links below.

I believe this issue goes back to the introduction of tpacket_rcv,
which predates git history.

Link: https://www.mail-archive.com/netdev@vger.kernel.org/msg237222.html
Suggested-by: Jon Rosen <jrosen@cisco.com>
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Jon Rosen <jrosen@cisco.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: ip_gre: Separate ERSPAN newlink / changelink callbacks
Petr Machata [Fri, 13 Mar 2020 11:39:36 +0000 (13:39 +0200)]
net: ip_gre: Separate ERSPAN newlink / changelink callbacks

ERSPAN shares most of the code path with GRE and gretap code. While that
helps keep the code compact, it is also error prone. Currently a broken
userspace can turn a gretap tunnel into a de facto ERSPAN one by passing
IFLA_GRE_ERSPAN_VER. There has been a similar issue in ip6gretap in the
past.

To prevent these problems in future, split the newlink and changelink code
paths. Split the ERSPAN code out of ipgre_netlink_parms() into a new
function erspan_netlink_parms(). Extract a piece of common logic from
ipgre_newlink() and ipgre_changelink() into ipgre_newlink_encap_setup().
Add erspan_newlink() and erspan_changelink().

Fixes: 84e54fe0a5ea ("gre: introduce native tunnel support for ERSPAN")
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agocxgb4: fix delete filter entry fail in unload path
Shahjada Abul Husain [Fri, 13 Mar 2020 09:02:57 +0000 (14:32 +0530)]
cxgb4: fix delete filter entry fail in unload path

Currently, the hardware TID index is assumed to start from index 0.
However, with the following changeset,

commit c21939998802 ("cxgb4: add support for high priority filters")

hardware TID index can start after the high priority region, which
has introduced a regression resulting in remove filters entry
failure for cxgb4 unload path. This patch fix that.

Fixes: c21939998802 ("cxgb4: add support for high priority filters")
Signed-off-by: Shahjada Abul Husain <shahjada@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: stmmac: platform: Fix misleading interrupt error msg
Markus Fuchs [Fri, 6 Mar 2020 16:38:48 +0000 (17:38 +0100)]
net: stmmac: platform: Fix misleading interrupt error msg

Not every stmmac based platform makes use of the eth_wake_irq or eth_lpi
interrupts. Use the platform_get_irq_byname_optional variant for these
interrupts, so no error message is displayed, if they can't be found.
Rather print an information to hint something might be wrong to assist
debugging on platforms which use these interrupts.

Signed-off-by: Markus Fuchs <mklntf@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet/bpfilter: fix dprintf usage for /dev/kmsg
Bruno Meneguele [Thu, 12 Mar 2020 23:08:20 +0000 (20:08 -0300)]
net/bpfilter: fix dprintf usage for /dev/kmsg

The bpfilter UMH code was recently changed to log its informative messages to
/dev/kmsg, however this interface doesn't support SEEK_CUR yet, used by
dprintf(). As result dprintf() returns -EINVAL and doesn't log anything.

However there already had some discussions about supporting SEEK_CUR into
/dev/kmsg interface in the past it wasn't concluded. Since the only user of
that from userspace perspective inside the kernel is the bpfilter UMH
(userspace) module it's better to correct it here instead waiting a conclusion
on the interface.

Fixes: 36c4357c63f3 ("net: bpfilter: print umh messages to /dev/kmsg")
Signed-off-by: Bruno Meneguele <bmeneg@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet_sched: keep alloc_hash updated after hash allocation
Cong Wang [Thu, 12 Mar 2020 05:42:28 +0000 (22:42 -0700)]
net_sched: keep alloc_hash updated after hash allocation

In commit 599be01ee567 ("net_sched: fix an OOB access in cls_tcindex")
I moved cp->hash calculation before the first
tcindex_alloc_perfect_hash(), but cp->alloc_hash is left untouched.
This difference could lead to another out of bound access.

cp->alloc_hash should always be the size allocated, we should
update it after this tcindex_alloc_perfect_hash().

Reported-and-tested-by: syzbot+dcc34d54d68ef7d2d53d@syzkaller.appspotmail.com
Reported-and-tested-by: syzbot+c72da7b9ed57cde6fca2@syzkaller.appspotmail.com
Fixes: 599be01ee567 ("net_sched: fix an OOB access in cls_tcindex")
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet_sched: hold rtnl lock in tcindex_partial_destroy_work()
Cong Wang [Thu, 12 Mar 2020 05:42:27 +0000 (22:42 -0700)]
net_sched: hold rtnl lock in tcindex_partial_destroy_work()

syzbot reported a use-after-free in tcindex_dump(). This is due to
the lack of RTNL in the deferred rcu work. We queue this work with
RTNL in tcindex_change(), later, tcindex_dump() is called:

        fh = tp->ops->get(tp, t->tcm_handle);
...
        err = tp->ops->change(..., &fh, ...);
        tfilter_notify(..., fh, ...);

but there is nothing to serialize the pending
tcindex_partial_destroy_work() with tcindex_dump().

Fix this by simply holding RTNL in tcindex_partial_destroy_work(),
so that it won't be called until RTNL is released after
tc_new_tfilter() is completed.

Reported-and-tested-by: syzbot+653090db2562495901dc@syzkaller.appspotmail.com
Fixes: 3d210534cc93 ("net_sched: fix a race condition in tcindex_destroy()")
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoafs: Fix client call Rx-phase signal handling
David Howells [Thu, 12 Mar 2020 21:40:06 +0000 (21:40 +0000)]
afs: Fix client call Rx-phase signal handling

Fix the handling of signals in client rxrpc calls made by the afs
filesystem.  Ignore signals completely, leaving call abandonment or
connection loss to be detected by timeouts inside AF_RXRPC.

Allowing a filesystem call to be interrupted after the entire request has
been transmitted and an abort sent means that the server may or may not
have done the action - and we don't know.  It may even be worse than that
for older servers.

Fixes: bc5e3a546d55 ("rxrpc: Use MSG_WAITALL to tell sendmsg() to temporarily ignore signals")
Signed-off-by: David Howells <dhowells@redhat.com>
4 years agoafs: Fix handling of an abort from a service handler
David Howells [Fri, 13 Mar 2020 13:46:08 +0000 (13:46 +0000)]
afs: Fix handling of an abort from a service handler

When an AFS service handler function aborts a call, AF_RXRPC marks the call
as complete - which means that it's not going to get any more packets from
the receiver.  This is a problem because reception of the final ACK is what
triggers afs_deliver_to_call() to drop the final ref on the afs_call
object.

Instead, aborted AFS service calls may then just sit around waiting for
ever or until they're displaced by a new call on the same connection
channel or a connection-level abort.

Fix this by calling afs_set_call_complete() to finalise the afs_call struct
representing the call.

However, we then need to drop the ref that stops the call from being
deallocated.  We can do this in afs_set_call_complete(), as the work queue
is holding a separate ref of its own, but then we shouldn't do it in
afs_process_async_call() and afs_delete_async_call().

call->drop_ref is set to indicate that a ref needs dropping for a call and
this is dealt with when we transition a call to AFS_CALL_COMPLETE.

But then we also need to get rid of the ref that pins an asynchronous
client call.  We can do this by the same mechanism, setting call->drop_ref
for an async client call too.

We can also get rid of call->incoming since nothing ever sets it and only
one thing ever checks it (futilely).

A trace of the rxrpc_call and afs_call struct ref counting looks like:

          <idle>-0     [001] ..s5   164.764892: rxrpc_call: c=00000002 SEE u=3 sp=rxrpc_new_incoming_call+0x473/0xb34 a=00000000442095b5
          <idle>-0     [001] .Ns5   164.766001: rxrpc_call: c=00000002 QUE u=4 sp=rxrpc_propose_ACK+0xbe/0x551 a=00000000442095b5
          <idle>-0     [001] .Ns4   164.766005: rxrpc_call: c=00000002 PUT u=3 sp=rxrpc_new_incoming_call+0xa3f/0xb34 a=00000000442095b5
          <idle>-0     [001] .Ns7   164.766433: afs_call: c=00000002 WAKE  u=2 o=11 sp=rxrpc_notify_socket+0x196/0x33c
     kworker/1:2-1810  [001] ...1   164.768409: rxrpc_call: c=00000002 SEE u=3 sp=rxrpc_process_call+0x25/0x7ae a=00000000442095b5
     kworker/1:2-1810  [001] ...1   164.769439: rxrpc_tx_packet: c=00000002 e9f1a7a8:95786a88:00000008:09c5 00000001 00000000 02 22 ACK CallAck
     kworker/1:2-1810  [001] ...1   164.769459: rxrpc_call: c=00000002 PUT u=2 sp=rxrpc_process_call+0x74f/0x7ae a=00000000442095b5
     kworker/1:2-1810  [001] ...1   164.770794: afs_call: c=00000002 QUEUE u=3 o=12 sp=afs_deliver_to_call+0x449/0x72c
     kworker/1:2-1810  [001] ...1   164.770829: afs_call: c=00000002 PUT   u=2 o=12 sp=afs_process_async_call+0xdb/0x11e
     kworker/1:2-1810  [001] ...2   164.771084: rxrpc_abort: c=00000002 95786a88:00000008 s=0 a=1 e=1 K-1
     kworker/1:2-1810  [001] ...1   164.771461: rxrpc_tx_packet: c=00000002 e9f1a7a8:95786a88:00000008:09c5 00000002 00000000 04 00 ABORT CallAbort
     kworker/1:2-1810  [001] ...1   164.771466: afs_call: c=00000002 PUT   u=1 o=12 sp=SRXAFSCB_ProbeUuid+0xc1/0x106

The abort generated in SRXAFSCB_ProbeUuid(), labelled "K-1", indicates that
the local filesystem/cache manager didn't recognise the UUID as its own.

Fixes: 2067b2b3f484 ("afs: Fix the CB.ProbeUuid service handler to reply correctly")
Signed-off-by: David Howells <dhowells@redhat.com>
4 years agoafs: Fix some tracing details
David Howells [Fri, 13 Mar 2020 13:36:01 +0000 (13:36 +0000)]
afs: Fix some tracing details

Fix a couple of tracelines to indicate the usage count after the atomic op,
not the usage count before it to be consistent with other afs and rxrpc
trace lines.

Change the wording of the afs_call_trace_work trace ID label from "WORK" to
"QUEUE" to reflect the fact that it's queueing work, not doing work.

Fixes: 341f741f04be ("afs: Refcount the afs_call struct")
Signed-off-by: David Howells <dhowells@redhat.com>
4 years agorxrpc: Fix sendmsg(MSG_WAITALL) handling
David Howells [Fri, 13 Mar 2020 17:30:27 +0000 (17:30 +0000)]
rxrpc: Fix sendmsg(MSG_WAITALL) handling

Fix the handling of sendmsg() with MSG_WAITALL for userspace to round the
timeout for when a signal occurs up to at least two jiffies as a 1 jiffy
timeout may end up being effectively 0 if jiffies wraps at the wrong time.

Fixes: bc5e3a546d55 ("rxrpc: Use MSG_WAITALL to tell sendmsg() to temporarily ignore signals")
Signed-off-by: David Howells <dhowells@redhat.com>
4 years agorxrpc: Fix call interruptibility handling
David Howells [Fri, 13 Mar 2020 09:22:09 +0000 (09:22 +0000)]
rxrpc: Fix call interruptibility handling

Fix the interruptibility of kernel-initiated client calls so that they're
either only interruptible when they're waiting for a call slot to come
available or they're not interruptible at all.  Either way, they're not
interruptible during transmission.

This should help prevent StoreData calls from being interrupted when
writeback is in progress.  It doesn't, however, handle interruption during
the receive phase.

Userspace-initiated calls are still interruptable.  After the signal has
been handled, sendmsg() will return the amount of data copied out of the
buffer and userspace can perform another sendmsg() call to continue
transmission.

Fixes: bc5e3a546d55 ("rxrpc: Use MSG_WAITALL to tell sendmsg() to temporarily ignore signals")
Signed-off-by: David Howells <dhowells@redhat.com>
4 years agorxrpc: Abstract out the calculation of whether there's Tx space
David Howells [Fri, 13 Mar 2020 09:05:38 +0000 (09:05 +0000)]
rxrpc: Abstract out the calculation of whether there's Tx space

Abstract out the calculation of there being sufficient Tx buffer space.
This is reproduced several times in the rxrpc sendmsg code.

Signed-off-by: David Howells <dhowells@redhat.com>
4 years agoMerge tag 'wireless-drivers-2020-03-13' of git://git.kernel.org/pub/scm/linux/kernel...
David S. Miller [Fri, 13 Mar 2020 18:21:25 +0000 (11:21 -0700)]
Merge tag 'wireless-drivers-2020-03-13' of git://git./linux/kernel/git/kvalo/wireless-drivers

Kalle Valo says:

====================
wireless-drivers fixes for v5.6

Third, and hopefully last, set of fixes for v5.6.

iwlwifi

* fix a locking issue in time events handling

* a fix in rate-scaling

* fix for a potential NULL pointer deref

* enable antenna diversity in some devices that were erroneously not doing it

* allow FW dumps to continue when the FW is stuck

* a fix in the HE capabilities handling

* another fix for FW dumps where we were reading wrong addresses

* fix link in MAINTAINERS file

rtlwifi

* fix regression causing connect issues in v5.4

wlcore

* remove merge damage which luckily didn't have any impact on functionality
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf
David S. Miller [Fri, 13 Mar 2020 18:13:45 +0000 (11:13 -0700)]
Merge git://git./pub/scm/linux/kernel/git/bpf/bpf

Alexei Starovoitov says:

====================
pull-request: bpf 2020-03-12

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

We've added 12 non-merge commits during the last 8 day(s) which contain
a total of 12 files changed, 161 insertions(+), 15 deletions(-).

The main changes are:

1) Andrii fixed two bugs in cgroup-bpf.

2) John fixed sockmap.

3) Luke fixed x32 jit.

4) Martin fixed two issues in struct_ops.

5) Yonghong fixed bpf_send_signal.

6) Yoshiki fixed BTF enum.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge tag 'drm-fixes-2020-03-13' of git://anongit.freedesktop.org/drm/drm
Linus Torvalds [Fri, 13 Mar 2020 01:05:19 +0000 (18:05 -0700)]
Merge tag 'drm-fixes-2020-03-13' of git://anongit.freedesktop.org/drm/drm

Pull drm fixes from Dave Airlie:
 "It's a bit quieter, probably not as much as it could be.

  There is on large regression fix in here from Lyude for displayport
  bandwidth calculations, there've been reports of multi-monitor in
  docks not working since -rc1 and this has been tested to fix those.

  Otherwise it's a bunch of i915 (with some GVT fixes), a set of amdgpu
  watermark + bios fixes, and an exynos iommu cleanup fix.

  core:
   - DP MST bandwidth regression fix.

  i915:
   - hard lockup fix
   - GVT fixes
   - 32-bit alignment issue fix
   - timeline wait fixes
   - cacheline_retire and free

  amdgpu:
   - Update the display watermark bounding box for navi14
   - Fix fetching vbios directly from rom on vega20/arcturus
   - Navi and renoir watermark fixes

  exynos:
   - iommu object cleanup fix"

`

* tag 'drm-fixes-2020-03-13' of git://anongit.freedesktop.org/drm/drm:
  drm/dp_mst: Rewrite and fix bandwidth limit checks
  drm/dp_mst: Reprobe path resources in CSN handler
  drm/dp_mst: Use full_pbn instead of available_pbn for bandwidth checks
  drm/dp_mst: Rename drm_dp_mst_is_dp_mst_end_device() to be less redundant
  drm/i915: Defer semaphore priority bumping to a workqueue
  drm/i915/gt: Close race between cacheline_retire and free
  drm/i915/execlists: Enable timeslice on partial virtual engine dequeue
  drm/i915: be more solid in checking the alignment
  drm/i915/gvt: Fix dma-buf display blur issue on CFL
  drm/i915: Return early for await_start on same timeline
  drm/i915: Actually emit the await_start
  drm/amdgpu/powerplay: nv1x, renior copy dcn clock settings of watermark to smu during boot up
  drm/exynos: Fix cleanup of IOMMU related objects
  drm/amdgpu: correct ROM_INDEX/DATA offset for VEGA20
  drm/amd/display: update soc bb for nv14
  drm/i915/gvt: Fix emulated vbt size issue
  drm/i915/gvt: Fix unnecessary schedule timer when no vGPU exits

4 years agoMerge tag 'topic/mst-bw-check-fixes-for-airlied-2020-03-12-2' of git://anongit.freede...
Dave Airlie [Fri, 13 Mar 2020 00:38:24 +0000 (10:38 +1000)]
Merge tag 'topic/mst-bw-check-fixes-for-airlied-2020-03-12-2' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes

UAPI Changes: None

Cross-subsystem Changes: None

Core Changes: Fixed regressions introduced by commit cd82d82cbc04
("drm/dp_mst: Add branch bandwidth validation to MST atomic check"),
which would cause us to:

* Calculate the available bandwidth on an MST topology incorrectly, and
  as a result reject most display configurations that would try to enable
  more then one sink on a topology
* Occasionally expose MST connectors to userspace before finishing
  probing their PBN capabilities, resulting in us rejecting display
  configurations because we assumed briefly that no bandwidth was
  available

Driver Changes: None

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Lyude Paul <lyude@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/bf16ee577567beed91c86b7d9cda3ec2e8c50a71.camel@redhat.com
4 years agoMerge tag 'drm-intel-fixes-2020-03-12' of git://anongit.freedesktop.org/drm/drm-intel...
Dave Airlie [Thu, 12 Mar 2020 23:41:15 +0000 (09:41 +1000)]
Merge tag 'drm-intel-fixes-2020-03-12' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes

drm/i915 fixes for v5.6-rc6:
- hard lockup fix
- GVT fixes
- 32-bit alignment issue fix
- timeline wait fixes
- cacheline_retire and free

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/87lfo6ksvw.fsf@intel.com
4 years agoMerge tag 'amd-drm-fixes-5.6-2020-03-11' of git://people.freedesktop.org/~agd5f/linux...
Dave Airlie [Thu, 12 Mar 2020 23:22:25 +0000 (09:22 +1000)]
Merge tag 'amd-drm-fixes-5.6-2020-03-11' of git://people.freedesktop.org/~agd5f/linux into drm-fixes

amd-drm-fixes-5.6-2020-03-11:

amdgpu:
- Update the display watermark bounding box for navi14
- Fix fetching vbios directly from rom on vega20/arcturus
- Navi and renoir watermark fixes

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexdeucher@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200312020924.4161-1-alexander.deucher@amd.com
4 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Linus Torvalds [Thu, 12 Mar 2020 23:19:19 +0000 (16:19 -0700)]
Merge git://git./linux/kernel/git/netdev/net

Pull networking fixes from David Miller:
 "It looks like a decent sized set of fixes, but a lot of these are one
  liner off-by-one and similar type changes:

   1) Fix netlink header pointer to calcular bad attribute offset
      reported to user. From Pablo Neira Ayuso.

   2) Don't double clear PHY interrupts when ->did_interrupt is set,
      from Heiner Kallweit.

   3) Add missing validation of various (devlink, nl802154, fib, etc.)
      attributes, from Jakub Kicinski.

   4) Missing *pos increments in various netfilter seq_next ops, from
      Vasily Averin.

   5) Missing break in of_mdiobus_register() loop, from Dajun Jin.

   6) Don't double bump tx_dropped in veth driver, from Jiang Lidong.

   7) Work around FMAN erratum A050385, from Madalin Bucur.

   8) Make sure ARP header is pulled early enough in bonding driver,
      from Eric Dumazet.

   9) Do a cond_resched() during multicast processing of ipvlan and
      macvlan, from Mahesh Bandewar.

  10) Don't attach cgroups to unrelated sockets when in interrupt
      context, from Shakeel Butt.

  11) Fix tpacket ring state management when encountering unknown GSO
      types. From Willem de Bruijn.

  12) Fix MDIO bus PHY resume by checking mdio_bus_phy_may_suspend()
      only in the suspend context. From Heiner Kallweit"

* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (112 commits)
  net: systemport: fix index check to avoid an array out of bounds access
  tc-testing: add ETS scheduler to tdc build configuration
  net: phy: fix MDIO bus PM PHY resuming
  net: hns3: clear port base VLAN when unload PF
  net: hns3: fix RMW issue for VLAN filter switch
  net: hns3: fix VF VLAN table entries inconsistent issue
  net: hns3: fix "tc qdisc del" failed issue
  taprio: Fix sending packets without dequeueing them
  net: mvmdio: avoid error message for optional IRQ
  net: dsa: mv88e6xxx: Add missing mask of ATU occupancy register
  net: memcg: fix lockdep splat in inet_csk_accept()
  s390/qeth: implement smarter resizing of the RX buffer pool
  s390/qeth: refactor buffer pool code
  s390/qeth: use page pointers to manage RX buffer pool
  seg6: fix SRv6 L2 tunnels to use IANA-assigned protocol number
  net: dsa: Don't instantiate phylink for CPU/DSA ports unless needed
  net/packet: tpacket_rcv: do not increment ring index on drop
  sxgbe: Fix off by one in samsung driver strncpy size arg
  net: caif: Add lockdep expression to RCU traversal primitive
  MAINTAINERS: remove Sathya Perla as Emulex NIC maintainer
  ...

4 years agodrm/dp_mst: Rewrite and fix bandwidth limit checks
Lyude Paul [Mon, 9 Mar 2020 21:01:31 +0000 (17:01 -0400)]
drm/dp_mst: Rewrite and fix bandwidth limit checks

Sigh, this is mostly my fault for not giving commit cd82d82cbc04
("drm/dp_mst: Add branch bandwidth validation to MST atomic check")
enough scrutiny during review. The way we're checking bandwidth
limitations here is mostly wrong:

For starters, drm_dp_mst_atomic_check_bw_limit() determines the
pbn_limit of a branch by simply scanning each port on the current branch
device, then uses the last non-zero full_pbn value that it finds. It
then counts the sum of the PBN used on each branch device for that
level, and compares against the full_pbn value it found before.

This is wrong because ports can and will have different PBN limitations
on many hubs, especially since a number of DisplayPort hubs out there
will be clever and only use the smallest link rate required for each
downstream sink - potentially giving every port a different full_pbn
value depending on what link rate it's trained at. This means with our
current code, which max PBN value we end up with is not well defined.

Additionally, we also need to remember when checking bandwidth
limitations that the top-most device in any MST topology is a branch
device, not a port. This means that the first level of a topology
doesn't technically have a full_pbn value that needs to be checked.
Instead, we should assume that so long as our VCPI allocations fit we're
within the bandwidth limitations of the primary MSTB.

We do however, want to check full_pbn on every port including those of
the primary MSTB. However, it's important to keep in mind that this
value represents the minimum link rate /between a port's sink or mstb,
and the mstb itself/. A quick diagram to explain:

                                MSTB #1
                               /       \
                              /         \
                           Port #1    Port #2
       full_pbn for Port #1 → |          | ← full_pbn for Port #2
                           Sink #1    MSTB #2
                                         |
                                       etc...

Note that in the above diagram, the combined PBN from all VCPI
allocations on said hub should not exceed the full_pbn value of port #2,
and the display configuration on sink #1 should not exceed the full_pbn
value of port #1. However, port #1 and port #2 can otherwise consume as
much bandwidth as they want so long as their VCPI allocations still fit.

And finally - our current bandwidth checking code also makes the mistake
of not checking whether something is an end device or not before trying
to traverse down it.

So, let's fix it by rewriting our bandwidth checking helpers. We split
the function into one part for handling branches which simply adds up
the total PBN on each branch and returns it, and one for checking each
port to ensure we're not going over its PBN limit. Phew.

This should fix regressions seen, where we erroneously reject display
configurations due to thinking they're going over our bandwidth limits
when they're not.

Changes since v1:
* Took an even closer look at how PBN limitations are supposed to be
  handled, and did some experimenting with Sean Paul. Ended up rewriting
  these helpers again, but this time they should actually be correct!
Changes since v2:
* Small indenting fix
* Fix pbn_used check in drm_dp_mst_atomic_check_port_bw_limit()

Signed-off-by: Lyude Paul <lyude@redhat.com>
Fixes: cd82d82cbc04 ("drm/dp_mst: Add branch bandwidth validation to MST atomic check")
Cc: Sean Paul <seanpaul@google.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Mikita Lipski <mikita.lipski@amd.com>
Tested-by: Hans de Goede <hdegoede@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200309210131.1497545-1-lyude@redhat.com
4 years agodrm/dp_mst: Reprobe path resources in CSN handler
Lyude Paul [Fri, 6 Mar 2020 23:46:21 +0000 (18:46 -0500)]
drm/dp_mst: Reprobe path resources in CSN handler

We used to punt off reprobing path resources to the link address probe
work, but now that we handle CSNs asynchronously from the driver's HPD
handling we can do whatever the heck we want from the CSN!

So, reprobe the path resources from drm_dp_mst_handle_conn_stat(). Also,
get rid of the path resource reprobing code in
drm_dp_check_and_send_link_address() since it's needlessly complicated
when we already reprobe path resources from
drm_dp_handle_link_address_port(). And finally, teach
drm_dp_send_enum_path_resources() to return 1 on PBN changes so we know
if we need to send another hotplug or not.

This fixes issues where we've indicated to userspace that a port has
just been connected, before we actually probed it's available PBN -
something that results in unexpected atomic check failures.

Signed-off-by: Lyude Paul <lyude@redhat.com>
Fixes: cd82d82cbc04 ("drm/dp_mst: Add branch bandwidth validation to MST atomic check")
Cc: Mikita Lipski <mikita.lipski@amd.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Sean Paul <sean@poorly.run>
Link: https://patchwork.freedesktop.org/patch/msgid/20200306234623.547525-4-lyude@redhat.com
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Tested-by: Hans de Goede <hdegoede@redhat.com>
4 years agodrm/dp_mst: Use full_pbn instead of available_pbn for bandwidth checks
Lyude Paul [Fri, 6 Mar 2020 23:46:20 +0000 (18:46 -0500)]
drm/dp_mst: Use full_pbn instead of available_pbn for bandwidth checks

DisplayPort specifications are fun. For a while, it's been really
unclear to us what available_pbn actually does. There's a somewhat vague
explanation in the DisplayPort spec (starting from 1.2) that partially
explains it:

  The minimum payload bandwidth number supported by the path. Each node
  updates this number with its available payload bandwidth number if its
  payload bandwidth number is less than that in the Message Transaction
  reply.

So, it sounds like available_pbn represents the smallest link rate in
use between the source and the branch device. Cool, so full_pbn is just
the highest possible PBN that the branch device supports right?

Well, we assumed that for quite a while until Sean Paul noticed that on
some MST hubs, available_pbn will actually get set to 0 whenever there's
any active payloads on the respective branch device. This caused quite a
bit of confusion since clearing the payload ID table would end up fixing
the available_pbn value.

So, we just went with that until commit cd82d82cbc04 ("drm/dp_mst: Add
branch bandwidth validation to MST atomic check") started breaking
people's setups due to us getting erroneous available_pbn values. So, we
did some more digging and got confused until we finally looked at the
definition for full_pbn:

  The bandwidth of the link at the trained link rate and lane count
  between the DP Source device and the DP Sink device with no time slots
  allocated to VC Payloads, represented as a Payload Bandwidth Number. As
  with the Available_Payload_Bandwidth_Number, this number is determined
  by the link with the lowest lane count and link rate.

That's what we get for not reading specs closely enough, hehe. So, since
full_pbn is definitely what we want for doing bandwidth restriction
checks - let's start using that instead and ignore available_pbn
entirely.

Signed-off-by: Lyude Paul <lyude@redhat.com>
Fixes: cd82d82cbc04 ("drm/dp_mst: Add branch bandwidth validation to MST atomic check")
Cc: Mikita Lipski <mikita.lipski@amd.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Sean Paul <sean@poorly.run>
Reviewed-by: Mikita Lipski <mikita.lipski@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200306234623.547525-3-lyude@redhat.com
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Tested-by: Hans de Goede <hdegoede@redhat.com>
4 years agodrm/dp_mst: Rename drm_dp_mst_is_dp_mst_end_device() to be less redundant
Lyude Paul [Fri, 6 Mar 2020 23:46:19 +0000 (18:46 -0500)]
drm/dp_mst: Rename drm_dp_mst_is_dp_mst_end_device() to be less redundant

It's already prefixed by dp_mst, so we don't really need to repeat
ourselves here. One of the changes I should have picked up originally
when reviewing MST DSC support.

There should be no functional changes here

Cc: Mikita Lipski <mikita.lipski@amd.com>
Cc: Sean Paul <seanpaul@google.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Tested-by: Hans de Goede <hdegoede@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200306234623.547525-2-lyude@redhat.com
4 years agoMerge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Linus Torvalds [Thu, 12 Mar 2020 22:51:26 +0000 (15:51 -0700)]
Merge branch 'fixes' of git://git./linux/kernel/git/viro/vfs

Pull vfs fixes from Al Viro:
 "A couple of fixes for old crap in ->atomic_open() instances"

* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  cifs_atomic_open(): fix double-put on late allocation failure
  gfs2_atomic_open(): fix O_EXCL|O_CREAT handling on cold dcache

4 years agonet: systemport: fix index check to avoid an array out of bounds access
Colin Ian King [Thu, 12 Mar 2020 15:04:30 +0000 (15:04 +0000)]
net: systemport: fix index check to avoid an array out of bounds access

Currently the bounds check on index is off by one and can lead to
an out of bounds access on array priv->filters_loc when index is
RXCHK_BRCM_TAG_MAX.

Fixes: bb9051a2b230 ("net: systemport: Add support for WAKE_FILTER")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agotc-testing: add ETS scheduler to tdc build configuration
Davide Caratti [Thu, 12 Mar 2020 16:51:45 +0000 (17:51 +0100)]
tc-testing: add ETS scheduler to tdc build configuration

add CONFIG_NET_SCH_ETS to 'config', otherwise test suites using this file
to perform a full tdc run will encounter the following warning:

  ok 645 e90e - Add ETS qdisc using bands # skipped - "-----> teardown stage" did not complete successfully

Fixes: 82c664b69c8b ("selftests: qdiscs: Add test coverage for ETS Qdisc")
Reported-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: phy: fix MDIO bus PM PHY resuming
Heiner Kallweit [Thu, 12 Mar 2020 21:25:20 +0000 (22:25 +0100)]
net: phy: fix MDIO bus PM PHY resuming

So far we have the unfortunate situation that mdio_bus_phy_may_suspend()
is called in suspend AND resume path, assuming that function result is
the same. After the original change this is no longer the case,
resulting in broken resume as reported by Geert.

To fix this call mdio_bus_phy_may_suspend() in the suspend path only,
and let the phy_device store the info whether it was suspended by
MDIO bus PM.

Fixes: 503ba7c69610 ("net: phy: Avoid multiple suspends")
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Tested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agocifs_atomic_open(): fix double-put on late allocation failure
Al Viro [Thu, 12 Mar 2020 22:25:20 +0000 (18:25 -0400)]
cifs_atomic_open(): fix double-put on late allocation failure

several iterations of ->atomic_open() calling conventions ago, we
used to need fput() if ->atomic_open() failed at some point after
successful finish_open().  Now (since 2016) it's not needed -
struct file carries enough state to make fput() work regardless
of the point in struct file lifecycle and discarding it on
failure exits in open() got unified.  Unfortunately, I'd missed
the fact that we had an instance of ->atomic_open() (cifs one)
that used to need that fput(), as well as the stale comment in
finish_open() demanding such late failure handling.  Trivially
fixed...

Fixes: fe9ec8291fca "do_last(): take fput() on error after opening to out:"
Cc: stable@kernel.org # v4.7+
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
4 years agogfs2_atomic_open(): fix O_EXCL|O_CREAT handling on cold dcache
Al Viro [Tue, 10 Mar 2020 13:31:41 +0000 (09:31 -0400)]
gfs2_atomic_open(): fix O_EXCL|O_CREAT handling on cold dcache

with the way fs/namei.c:do_last() had been done, ->atomic_open()
instances needed to recognize the case when existing file got
found with O_EXCL|O_CREAT, either by falling back to finish_no_open()
or failing themselves.  gfs2 one didn't.

Fixes: 6d4ade986f9c (GFS2: Add atomic_open support)
Cc: stable@kernel.org # v3.11
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
4 years agoMerge branch 'hns3-fixes'
David S. Miller [Thu, 12 Mar 2020 18:38:27 +0000 (11:38 -0700)]
Merge branch 'hns3-fixes'

Huazhong Tan says:

====================
net: hns3: fixes for -net

This series includes several bugfixes for the HNS3 ethernet driver.

[patch 1] fixes an "tc qdisc del" failure.
[patch 2] fixes SW & HW VLAN table not consistent issue.
[patch 3] fixes a RMW issue related to VLAN filter switch.
[patch 4] clears port based VLAN when uploading PF.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: hns3: clear port base VLAN when unload PF
Jian Shen [Thu, 12 Mar 2020 07:11:06 +0000 (15:11 +0800)]
net: hns3: clear port base VLAN when unload PF

Currently, PF missed to clear the port base VLAN for VF when
unload. In this case, the VLAN id will remain in the VLAN
table. This patch fixes it.

Fixes: 92f11ea177cd ("net: hns3: fix set port based VLAN issue for VF")
Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: hns3: fix RMW issue for VLAN filter switch
Jian Shen [Thu, 12 Mar 2020 07:11:05 +0000 (15:11 +0800)]
net: hns3: fix RMW issue for VLAN filter switch

According to the user manual, the ingress and egress VLAN filter
are configured at the same time. Currently, hclge_init_vlan_config()
and hclge_set_vlan_spoofchk() will both change the VLAN filter
switch. So it's necessary to read the old configuration before
modifying it.

Fixes: 22044f95faa0 ("net: hns3: add support for spoof check setting")
Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: hns3: fix VF VLAN table entries inconsistent issue
Jian Shen [Thu, 12 Mar 2020 07:11:04 +0000 (15:11 +0800)]
net: hns3: fix VF VLAN table entries inconsistent issue

Currently, if VF is loaded on the host side, the host doesn't
clear the VF's VLAN table entries when VF removing. In this
case, when doing reset and disabling sriov at the same time the
VLAN device over VF will be removed, but the VLAN table entries
in hardware are remained.

This patch fixes it by asking PF to clear the VLAN table entries for
VF when VF is removing. It also clears the VLAN table full bit
after VF VLAN table entries being cleared.

Fixes: c6075b193462 ("net: hns3: Record VF vlan tables")
Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: hns3: fix "tc qdisc del" failed issue
Yonglong Liu [Thu, 12 Mar 2020 07:11:03 +0000 (15:11 +0800)]
net: hns3: fix "tc qdisc del" failed issue

The HNS3 driver supports to configure TC numbers and TC to priority
map via "tc" tool. But when delete the rule, will fail, because
the HNS3 driver needs at least one TC, but the "tc" tool sets TC
number to zero when delete.

This patch makes sure that the TC number is at least one.

Fixes: 30d240dfa2e8 ("net: hns3: Add mqprio hardware offload support in hns3 driver")
Signed-off-by: Yonglong Liu <liuyonglong@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agotaprio: Fix sending packets without dequeueing them
Vinicius Costa Gomes [Mon, 9 Mar 2020 17:39:53 +0000 (10:39 -0700)]
taprio: Fix sending packets without dequeueing them

There was a bug that was causing packets to be sent to the driver
without first calling dequeue() on the "child" qdisc. And the KASAN
report below shows that sending a packet without calling dequeue()
leads to bad results.

The problem is that when checking the last qdisc "child" we do not set
the returned skb to NULL, which can cause it to be sent to the driver,
and so after the skb is sent, it may be freed, and in some situations a
reference to it may still be in the child qdisc, because it was never
dequeued.

The crash log looks like this:

[   19.937538] ==================================================================
[   19.938300] BUG: KASAN: use-after-free in taprio_dequeue_soft+0x620/0x780
[   19.938968] Read of size 4 at addr ffff8881128628cc by task swapper/1/0
[   19.939612]
[   19.939772] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.6.0-rc3+ #97
[   19.940397] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qe4
[   19.941523] Call Trace:
[   19.941774]  <IRQ>
[   19.941985]  dump_stack+0x97/0xe0
[   19.942323]  print_address_description.constprop.0+0x3b/0x60
[   19.942884]  ? taprio_dequeue_soft+0x620/0x780
[   19.943325]  ? taprio_dequeue_soft+0x620/0x780
[   19.943767]  __kasan_report.cold+0x1a/0x32
[   19.944173]  ? taprio_dequeue_soft+0x620/0x780
[   19.944612]  kasan_report+0xe/0x20
[   19.944954]  taprio_dequeue_soft+0x620/0x780
[   19.945380]  __qdisc_run+0x164/0x18d0
[   19.945749]  net_tx_action+0x2c4/0x730
[   19.946124]  __do_softirq+0x268/0x7bc
[   19.946491]  irq_exit+0x17d/0x1b0
[   19.946824]  smp_apic_timer_interrupt+0xeb/0x380
[   19.947280]  apic_timer_interrupt+0xf/0x20
[   19.947687]  </IRQ>
[   19.947912] RIP: 0010:default_idle+0x2d/0x2d0
[   19.948345] Code: 00 00 41 56 41 55 65 44 8b 2d 3f 8d 7c 7c 41 54 55 53 0f 1f 44 00 00 e8 b1 b2 c5 fd e9 07 00 3
[   19.950166] RSP: 0018:ffff88811a3efda0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
[   19.950909] RAX: 0000000080000000 RBX: ffff88811a3a9600 RCX: ffffffff8385327e
[   19.951608] RDX: 1ffff110234752c0 RSI: 0000000000000000 RDI: ffffffff8385262f
[   19.952309] RBP: ffffed10234752c0 R08: 0000000000000001 R09: ffffed10234752c1
[   19.953009] R10: ffffed10234752c0 R11: ffff88811a3a9607 R12: 0000000000000001
[   19.953709] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000
[   19.954408]  ? default_idle_call+0x2e/0x70
[   19.954816]  ? default_idle+0x1f/0x2d0
[   19.955192]  default_idle_call+0x5e/0x70
[   19.955584]  do_idle+0x3d4/0x500
[   19.955909]  ? arch_cpu_idle_exit+0x40/0x40
[   19.956325]  ? _raw_spin_unlock_irqrestore+0x23/0x30
[   19.956829]  ? trace_hardirqs_on+0x30/0x160
[   19.957242]  cpu_startup_entry+0x19/0x20
[   19.957633]  start_secondary+0x2a6/0x380
[   19.958026]  ? set_cpu_sibling_map+0x18b0/0x18b0
[   19.958486]  secondary_startup_64+0xa4/0xb0
[   19.958921]
[   19.959078] Allocated by task 33:
[   19.959412]  save_stack+0x1b/0x80
[   19.959747]  __kasan_kmalloc.constprop.0+0xc2/0xd0
[   19.960222]  kmem_cache_alloc+0xe4/0x230
[   19.960617]  __alloc_skb+0x91/0x510
[   19.960967]  ndisc_alloc_skb+0x133/0x330
[   19.961358]  ndisc_send_ns+0x134/0x810
[   19.961735]  addrconf_dad_work+0xad5/0xf80
[   19.962144]  process_one_work+0x78e/0x13a0
[   19.962551]  worker_thread+0x8f/0xfa0
[   19.962919]  kthread+0x2ba/0x3b0
[   19.963242]  ret_from_fork+0x3a/0x50
[   19.963596]
[   19.963753] Freed by task 33:
[   19.964055]  save_stack+0x1b/0x80
[   19.964386]  __kasan_slab_free+0x12f/0x180
[   19.964830]  kmem_cache_free+0x80/0x290
[   19.965231]  ip6_mc_input+0x38a/0x4d0
[   19.965617]  ipv6_rcv+0x1a4/0x1d0
[   19.965948]  __netif_receive_skb_one_core+0xf2/0x180
[   19.966437]  netif_receive_skb+0x8c/0x3c0
[   19.966846]  br_handle_frame_finish+0x779/0x1310
[   19.967302]  br_handle_frame+0x42a/0x830
[   19.967694]  __netif_receive_skb_core+0xf0e/0x2a90
[   19.968167]  __netif_receive_skb_one_core+0x96/0x180
[   19.968658]  process_backlog+0x198/0x650
[   19.969047]  net_rx_action+0x2fa/0xaa0
[   19.969420]  __do_softirq+0x268/0x7bc
[   19.969785]
[   19.969940] The buggy address belongs to the object at ffff888112862840
[   19.969940]  which belongs to the cache skbuff_head_cache of size 224
[   19.971202] The buggy address is located 140 bytes inside of
[   19.971202]  224-byte region [ffff888112862840ffff888112862920)
[   19.972344] The buggy address belongs to the page:
[   19.972820] page:ffffea00044a1800 refcount:1 mapcount:0 mapping:ffff88811a2bd1c0 index:0xffff8881128625c0 compo0
[   19.973930] flags: 0x8000000000010200(slab|head)
[   19.974388] raw: 8000000000010200 ffff88811a2ed650 ffff88811a2ed650 ffff88811a2bd1c0
[   19.975151] raw: ffff8881128625c0 0000000000190013 00000001ffffffff 0000000000000000
[   19.975915] page dumped because: kasan: bad access detected
[   19.976461] page_owner tracks the page as allocated
[   19.976946] page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NO)
[   19.978332]  prep_new_page+0x24b/0x330
[   19.978707]  get_page_from_freelist+0x2057/0x2c90
[   19.979170]  __alloc_pages_nodemask+0x218/0x590
[   19.979619]  new_slab+0x9d/0x300
[   19.979948]  ___slab_alloc.constprop.0+0x2f9/0x6f0
[   19.980421]  __slab_alloc.constprop.0+0x30/0x60
[   19.980870]  kmem_cache_alloc+0x201/0x230
[   19.981269]  __alloc_skb+0x91/0x510
[   19.981620]  alloc_skb_with_frags+0x78/0x4a0
[   19.982043]  sock_alloc_send_pskb+0x5eb/0x750
[   19.982476]  unix_stream_sendmsg+0x399/0x7f0
[   19.982904]  sock_sendmsg+0xe2/0x110
[   19.983262]  ____sys_sendmsg+0x4de/0x6d0
[   19.983660]  ___sys_sendmsg+0xe4/0x160
[   19.984032]  __sys_sendmsg+0xab/0x130
[   19.984396]  do_syscall_64+0xe7/0xae0
[   19.984761] page last free stack trace:
[   19.985142]  __free_pages_ok+0x432/0xbc0
[   19.985533]  qlist_free_all+0x56/0xc0
[   19.985907]  quarantine_reduce+0x149/0x170
[   19.986315]  __kasan_kmalloc.constprop.0+0x9e/0xd0
[   19.986791]  kmem_cache_alloc+0xe4/0x230
[   19.987182]  prepare_creds+0x24/0x440
[   19.987548]  do_faccessat+0x80/0x590
[   19.987906]  do_syscall_64+0xe7/0xae0
[   19.988276]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   19.988775]
[   19.988930] Memory state around the buggy address:
[   19.989402]  ffff888112862780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   19.990111]  ffff888112862800: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
[   19.990822] >ffff888112862880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   19.991529]                                               ^
[   19.992081]  ffff888112862900: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc
[   19.992796]  ffff888112862980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc

Fixes: 5a781ccbd19e ("tc: Add support for configuring the taprio scheduler")
Reported-by: Michael Schmidt <michael.schmidt@eti.uni-siegen.de>
Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Acked-by: Andre Guedes <andre.guedes@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge tag 'for-linus-5.6-2' of git://github.com/cminyard/linux-ipmi
Linus Torvalds [Thu, 12 Mar 2020 16:59:36 +0000 (09:59 -0700)]
Merge tag 'for-linus-5.6-2' of git://github.com/cminyard/linux-ipmi

Pull IPMI fix from Corey Minyard:
 "Fix a message spew on some system

  The call to platform_get_irq() was changed to print a log if the
  interrupt was not available, and that was causing bogus messages to
  spew out for the IPMI driver. People have requested that this get in
  to 5.6 so I'm sending it along"

* tag 'for-linus-5.6-2' of git://github.com/cminyard/linux-ipmi:
  ipmi_si: Avoid spurious errors for optional IRQs

4 years agowlcore: remove stray plus sign
Johannes Berg [Thu, 12 Mar 2020 08:04:08 +0000 (09:04 +0100)]
wlcore: remove stray plus sign

The commit mentioned below added a stray plus sign, likely
due to some conflict resolution (i.e. as a leftover from a
unified diff), which was harmless since it was just used as
an integer constant modifier. Remove it anyway, now that I
stumbled across it.

Fixes: cf33a7728bf2 ("wlcore: mesh: Add support for RX Broadcast Key")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
4 years agoMerge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Linus Torvalds [Thu, 12 Mar 2020 16:25:55 +0000 (09:25 -0700)]
Merge branch 'linus' of git://git./linux/kernel/git/herbert/crypto-2.6

Pull crypto fix from Herbert Xu:
 "Fix a build problem with x86/curve25519"

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: x86/curve25519 - support assemblers with no adx support