WARNING: CPU: 0 PID: 0 at net/ipv4/af_inet.c:155 inet_sock

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* WARNING: CPU: 0 PID: 0 at net/ipv4/af_inet.c:155 inet_sock_destruct+0x1c4/0x1dc
       [not found]   ` <577BD201.2040202@gmail.com>
@ 2016-07-12  9:53     ` Mason
  2016-07-12 11:48       ` Mason
  2016-07-12 14:25       ` Eric Dumazet
  0 siblings, 2 replies; 5+ messages in thread
From: Mason @ 2016-07-12  9:53 UTC (permalink / raw)
  To: linux-arm-kernel

On 05/07/2016 17:28, Florian Fainelli wrote:

> Le 05/07/2016 07:50, Mason wrote:
> 
>> On 05/07/2016 15:33, Mason wrote:
>> 
>>> I was testing suspend/resume sequences where the suspend operation
>>> fails and returns without having suspended the platform.

Please forget I ever mentioned suspend, that was a red herring.
The warning is displayed even if I never suspend.
(Dropping linux-pm from this discussion.)

>> I rebooted, tried the same operation, and hit the same warning
>> still 310 seconds later:

However, the 310 seconds time span still seems to be relevant.

Steps to reproduce: I booted the system, logged in as root,
mounted an NFS file system, then left the system idling at
the prompt.

(I don't remember seeing this warning in v4.1 and v4.4)

What's going wrong here? Is it related to NFS?

Here is the defconfig I'm using
http://pastebin.ubuntu.com/19160299/

Regards.


[  317.940133] ------------[ cut here ]------------
[  317.944815] WARNING: CPU: 1 PID: 0 at net/ipv4/af_inet.c:155 inet_sock_destruct+0x1c4/0x1dc
[  317.953223] Modules linked in:
[  317.956305] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.7.0-rc6-00010-gd07031bdc433-dirty #2
[  317.964784] Hardware name: Sigma Tango DT
[  317.968809] Backtrace: 
[  317.971279] [<c010b974>] (dump_backtrace) from [<c010bb70>] (show_stack+0x18/0x1c)
[  317.978884]  r7:60000113 r6:c080ea84 r5:00000000 r4:c080ea84
[  317.984590] [<c010bb58>] (show_stack) from [<c02e9fc4>] (dump_stack+0x80/0x94)
[  317.991856] [<c02e9f44>] (dump_stack) from [<c011bfb0>] (__warn+0xec/0x104)
[  317.998849]  r7:00000009 r6:c05e3fc8 r5:00000000 r4:00000000
[  318.004549] [<c011bec4>] (__warn) from [<c011c080>] (warn_slowpath_null+0x28/0x30)
[  318.012154]  r9:dfbea4e0 r8:0000000a r7:df45fe30 r6:dec19594 r5:df68f144 r4:df68f040
[  318.019954] [<c011c058>] (warn_slowpath_null) from [<c0463be4>] (inet_sock_destruct+0x1c4/0x1dc)
[  318.028788] [<c0463a20>] (inet_sock_destruct) from [<c03e9c40>] (__sk_destruct+0x28/0xe0)
[  318.037005]  r7:df45fe30 r6:dec19594 r5:df68f040 r4:df68f1ec
[  318.042710] [<c03e9c18>] (__sk_destruct) from [<c016f218>] (rcu_process_callbacks+0x488/0x59c)
[  318.051363]  r5:00000000 r4:00000000
[  318.054962] [<c016ed90>] (rcu_process_callbacks) from [<c01207cc>] (__do_softirq+0x138/0x264)
[  318.063527]  r10:c08020a0 r9:40000001 r8:00000101 r7:df45e000 r6:c08020a4 r5:00000009
[  318.071408]  r4:00000000
[  318.073953] [<c0120694>] (__do_softirq) from [<c0120bec>] (irq_exit+0xc8/0x104)
[  318.081296]  r10:df45ff58 r9:df402400 r8:00000001 r7:00000000 r6:00000013 r5:00000000
[  318.089176]  r4:c0735428
[  318.091723] [<c0120b24>] (irq_exit) from [<c01625f8>] (__handle_domain_irq+0x88/0xf4)
[  318.099595] [<c0162570>] (__handle_domain_irq) from [<c01014ac>] (gic_handle_irq+0x50/0x94)
[  318.107986]  r10:00000000 r9:e0803100 r8:e0802100 r7:df45ff58 r6:e080210c r5:c080277c
[  318.115865]  r4:c080eca0 r3:df45ff58
[  318.119461] [<c010145c>] (gic_handle_irq) from [<c010c694>] (__irq_svc+0x54/0x90)
[  318.126980] Exception stack(0xdf45ff58 to 0xdf45ffa0)
[  318.132053] ff40:                                                       00000001 00000000
[  318.140273] ff60: 0000ab80 c0117c80 df45e000 c08024f8 c0802494 c081e2d6 c05b9550 413fc090
[  318.148492] ff80: 00000000 df45ffb4 df45ffb8 df45ffa8 c01086b0 c01086b4 60000013 ffffffff
[  318.156709]  r9:413fc090 r8:c05b9550 r7:df45ff8c r6:ffffffff r5:60000013 r4:c01086b4
[  318.164512] [<c0108674>] (arch_cpu_idle) from [<c0155f3c>] (default_idle_call+0x28/0x34)
[  318.172646] [<c0155f14>] (default_idle_call) from [<c0156070>] (cpu_startup_entry+0x128/0x17c)
[  318.181305] [<c0155f48>] (cpu_startup_entry) from [<c010dc14>] (secondary_start_kernel+0x158/0x164)
[  318.190395]  r7:c081e7c8 r4:c080b4f0
[  318.193993] [<c010dabc>] (secondary_start_kernel) from [<8010158c>] (0x8010158c)
[  318.201423]  r5:00000051 r4:9f44006a
[  318.205024] ---[ end trace 6e04001434b19cb9 ]---


Just to be sure, I performed the same steps a second time:

[  316.238527] ------------[ cut here ]------------
[  316.243210] WARNING: CPU: 1 PID: 0 at net/ipv4/af_inet.c:155 inet_sock_destruct+0x1c4/0x1dc
[  316.251619] Modules linked in:
[  316.254702] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.7.0-rc6-00010-gd07031bdc433-dirty #2
[  316.263182] Hardware name: Sigma Tango DT
[  316.267206] Backtrace: 
[  316.269675] [<c010b974>] (dump_backtrace) from [<c010bb70>] (show_stack+0x18/0x1c)
[  316.277280]  r7:60000113 r6:c080ea84 r5:00000000 r4:c080ea84
[  316.282986] [<c010bb58>] (show_stack) from [<c02e9fc4>] (dump_stack+0x80/0x94)
[  316.290254] [<c02e9f44>] (dump_stack) from [<c011bfb0>] (__warn+0xec/0x104)
[  316.297247]  r7:00000009 r6:c05e3fc8 r5:00000000 r4:00000000
[  316.302947] [<c011bec4>] (__warn) from [<c011c080>] (warn_slowpath_null+0x28/0x30)
[  316.310552]  r9:dfbea4e0 r8:0000000a r7:df45fe30 r6:dec15694 r5:df6063c4 r4:df6062c0
[  316.318354] [<c011c058>] (warn_slowpath_null) from [<c0463be4>] (inet_sock_destruct+0x1c4/0x1dc)
[  316.327190] [<c0463a20>] (inet_sock_destruct) from [<c03e9c40>] (__sk_destruct+0x28/0xe0)
[  316.335406]  r7:df45fe30 r6:dec15694 r5:df6062c0 r4:df60646c
[  316.341112] [<c03e9c18>] (__sk_destruct) from [<c016f218>] (rcu_process_callbacks+0x488/0x59c)
[  316.349765]  r5:00000000 r4:00000000
[  316.353363] [<c016ed90>] (rcu_process_callbacks) from [<c01207cc>] (__do_softirq+0x138/0x264)
[  316.361929]  r10:c08020a0 r9:40000001 r8:00000101 r7:df45e000 r6:c08020a4 r5:00000009
[  316.369811]  r4:00000000
[  316.372356] [<c0120694>] (__do_softirq) from [<c0120bec>] (irq_exit+0xc8/0x104)
[  316.379699]  r10:df45ff58 r9:df402400 r8:00000001 r7:00000000 r6:00000013 r5:00000000
[  316.387579]  r4:c0735428
[  316.390127] [<c0120b24>] (irq_exit) from [<c01625f8>] (__handle_domain_irq+0x88/0xf4)
[  316.397998] [<c0162570>] (__handle_domain_irq) from [<c01014ac>] (gic_handle_irq+0x50/0x94)
[  316.406388]  r10:00000000 r9:e0803100 r8:e0802100 r7:df45ff58 r6:e080210c r5:c080277c
[  316.414268]  r4:c080eca0 r3:df45ff58
[  316.417862] [<c010145c>] (gic_handle_irq) from [<c010c694>] (__irq_svc+0x54/0x90)
[  316.425382] Exception stack(0xdf45ff58 to 0xdf45ffa0)
[  316.430456] ff40:                                                       00000001 00000000
[  316.438676] ff60: 00009370 c0117c80 df45e000 c08024f8 c0802494 c081e2d6 c05b9550 413fc090
[  316.446897] ff80: 00000000 df45ffb4 df45ffb8 df45ffa8 c01086b0 c01086b4 60000013 ffffffff
[  316.455113]  r9:413fc090 r8:c05b9550 r7:df45ff8c r6:ffffffff r5:60000013 r4:c01086b4
[  316.462916] [<c0108674>] (arch_cpu_idle) from [<c0155f3c>] (default_idle_call+0x28/0x34)
[  316.471051] [<c0155f14>] (default_idle_call) from [<c0156070>] (cpu_startup_entry+0x128/0x17c)
[  316.479709] [<c0155f48>] (cpu_startup_entry) from [<c010dc14>] (secondary_start_kernel+0x158/0x164)
[  316.488799]  r7:c081e7c8 r4:c080b4f0
[  316.492395] [<c010dabc>] (secondary_start_kernel) from [<8010158c>] (0x8010158c)
[  316.499826]  r5:00000051 r4:9f44006a
[  316.503430] ---[ end trace 2dd53d8e86a1a69b ]---

^ permalink raw reply	[flat|nested] 5+ messages in thread

* WARNING: CPU: 0 PID: 0 at net/ipv4/af_inet.c:155 inet_sock_destruct+0x1c4/0x1dc
  2016-07-12  9:53     ` WARNING: CPU: 0 PID: 0 at net/ipv4/af_inet.c:155 inet_sock_destruct+0x1c4/0x1dc Mason
@ 2016-07-12 11:48       ` Mason
  2016-07-12 14:25       ` Eric Dumazet
  1 sibling, 0 replies; 5+ messages in thread
From: Mason @ 2016-07-12 11:48 UTC (permalink / raw)
  To: linux-arm-kernel

On 12/07/2016 11:53, Mason wrote:

> However, the 310 seconds time span still seems to be relevant.
> 
> Steps to reproduce: I booted the system, logged in as root,
> mounted an NFS file system, then left the system idling at
> the prompt.
> 
> (I don't remember seeing this warning in v4.1 and v4.4)
> 
> What's going wrong here? Is it related to NFS?
> 
> Here is the defconfig I'm using
> http://pastebin.ubuntu.com/19160299/
> 
> 
> [  317.940133] ------------[ cut here ]------------
> [  317.944815] WARNING: CPU: 1 PID: 0 at net/ipv4/af_inet.c:155 inet_sock_destruct+0x1c4/0x1dc
> [  317.953223] Modules linked in:
> [  317.956305] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.7.0-rc6-00010-gd07031bdc433-dirty #2
> [  317.964784] Hardware name: Sigma Tango DT
> [  317.968809] Backtrace: 
> [  317.971279] [<c010b974>] (dump_backtrace) from [<c010bb70>] (show_stack+0x18/0x1c)
> [  317.978884]  r7:60000113 r6:c080ea84 r5:00000000 r4:c080ea84
> [  317.984590] [<c010bb58>] (show_stack) from [<c02e9fc4>] (dump_stack+0x80/0x94)
> [  317.991856] [<c02e9f44>] (dump_stack) from [<c011bfb0>] (__warn+0xec/0x104)
> [  317.998849]  r7:00000009 r6:c05e3fc8 r5:00000000 r4:00000000
> [  318.004549] [<c011bec4>] (__warn) from [<c011c080>] (warn_slowpath_null+0x28/0x30)
> [  318.012154]  r9:dfbea4e0 r8:0000000a r7:df45fe30 r6:dec19594 r5:df68f144 r4:df68f040
> [  318.019954] [<c011c058>] (warn_slowpath_null) from [<c0463be4>] (inet_sock_destruct+0x1c4/0x1dc)
> [  318.028788] [<c0463a20>] (inet_sock_destruct) from [<c03e9c40>] (__sk_destruct+0x28/0xe0)
> [  318.037005]  r7:df45fe30 r6:dec19594 r5:df68f040 r4:df68f1ec
> [  318.042710] [<c03e9c18>] (__sk_destruct) from [<c016f218>] (rcu_process_callbacks+0x488/0x59c)
> [  318.051363]  r5:00000000 r4:00000000
> [  318.054962] [<c016ed90>] (rcu_process_callbacks) from [<c01207cc>] (__do_softirq+0x138/0x264)
> [  318.063527]  r10:c08020a0 r9:40000001 r8:00000101 r7:df45e000 r6:c08020a4 r5:00000009
> [  318.071408]  r4:00000000
> [  318.073953] [<c0120694>] (__do_softirq) from [<c0120bec>] (irq_exit+0xc8/0x104)
> [  318.081296]  r10:df45ff58 r9:df402400 r8:00000001 r7:00000000 r6:00000013 r5:00000000
> [  318.089176]  r4:c0735428
> [  318.091723] [<c0120b24>] (irq_exit) from [<c01625f8>] (__handle_domain_irq+0x88/0xf4)
> [  318.099595] [<c0162570>] (__handle_domain_irq) from [<c01014ac>] (gic_handle_irq+0x50/0x94)
> [  318.107986]  r10:00000000 r9:e0803100 r8:e0802100 r7:df45ff58 r6:e080210c r5:c080277c
> [  318.115865]  r4:c080eca0 r3:df45ff58
> [  318.119461] [<c010145c>] (gic_handle_irq) from [<c010c694>] (__irq_svc+0x54/0x90)
> [  318.126980] Exception stack(0xdf45ff58 to 0xdf45ffa0)
> [  318.132053] ff40:                                                       00000001 00000000
> [  318.140273] ff60: 0000ab80 c0117c80 df45e000 c08024f8 c0802494 c081e2d6 c05b9550 413fc090
> [  318.148492] ff80: 00000000 df45ffb4 df45ffb8 df45ffa8 c01086b0 c01086b4 60000013 ffffffff
> [  318.156709]  r9:413fc090 r8:c05b9550 r7:df45ff8c r6:ffffffff r5:60000013 r4:c01086b4
> [  318.164512] [<c0108674>] (arch_cpu_idle) from [<c0155f3c>] (default_idle_call+0x28/0x34)
> [  318.172646] [<c0155f14>] (default_idle_call) from [<c0156070>] (cpu_startup_entry+0x128/0x17c)
> [  318.181305] [<c0155f48>] (cpu_startup_entry) from [<c010dc14>] (secondary_start_kernel+0x158/0x164)
> [  318.190395]  r7:c081e7c8 r4:c080b4f0
> [  318.193993] [<c010dabc>] (secondary_start_kernel) from [<8010158c>] (0x8010158c)
> [  318.201423]  r5:00000051 r4:9f44006a
> [  318.205024] ---[ end trace 6e04001434b19cb9 ]---
> 
> 
> Just to be sure, I performed the same steps a second time:
> 
> [  316.238527] ------------[ cut here ]------------
> [  316.243210] WARNING: CPU: 1 PID: 0 at net/ipv4/af_inet.c:155 inet_sock_destruct+0x1c4/0x1dc
> [  316.251619] Modules linked in:
> [  316.254702] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.7.0-rc6-00010-gd07031bdc433-dirty #2
> [  316.263182] Hardware name: Sigma Tango DT
> [  316.267206] Backtrace: 
> [  316.269675] [<c010b974>] (dump_backtrace) from [<c010bb70>] (show_stack+0x18/0x1c)
> [  316.277280]  r7:60000113 r6:c080ea84 r5:00000000 r4:c080ea84
> [  316.282986] [<c010bb58>] (show_stack) from [<c02e9fc4>] (dump_stack+0x80/0x94)
> [  316.290254] [<c02e9f44>] (dump_stack) from [<c011bfb0>] (__warn+0xec/0x104)
> [  316.297247]  r7:00000009 r6:c05e3fc8 r5:00000000 r4:00000000
> [  316.302947] [<c011bec4>] (__warn) from [<c011c080>] (warn_slowpath_null+0x28/0x30)
> [  316.310552]  r9:dfbea4e0 r8:0000000a r7:df45fe30 r6:dec15694 r5:df6063c4 r4:df6062c0
> [  316.318354] [<c011c058>] (warn_slowpath_null) from [<c0463be4>] (inet_sock_destruct+0x1c4/0x1dc)
> [  316.327190] [<c0463a20>] (inet_sock_destruct) from [<c03e9c40>] (__sk_destruct+0x28/0xe0)
> [  316.335406]  r7:df45fe30 r6:dec15694 r5:df6062c0 r4:df60646c
> [  316.341112] [<c03e9c18>] (__sk_destruct) from [<c016f218>] (rcu_process_callbacks+0x488/0x59c)
> [  316.349765]  r5:00000000 r4:00000000
> [  316.353363] [<c016ed90>] (rcu_process_callbacks) from [<c01207cc>] (__do_softirq+0x138/0x264)
> [  316.361929]  r10:c08020a0 r9:40000001 r8:00000101 r7:df45e000 r6:c08020a4 r5:00000009
> [  316.369811]  r4:00000000
> [  316.372356] [<c0120694>] (__do_softirq) from [<c0120bec>] (irq_exit+0xc8/0x104)
> [  316.379699]  r10:df45ff58 r9:df402400 r8:00000001 r7:00000000 r6:00000013 r5:00000000
> [  316.387579]  r4:c0735428
> [  316.390127] [<c0120b24>] (irq_exit) from [<c01625f8>] (__handle_domain_irq+0x88/0xf4)
> [  316.397998] [<c0162570>] (__handle_domain_irq) from [<c01014ac>] (gic_handle_irq+0x50/0x94)
> [  316.406388]  r10:00000000 r9:e0803100 r8:e0802100 r7:df45ff58 r6:e080210c r5:c080277c
> [  316.414268]  r4:c080eca0 r3:df45ff58
> [  316.417862] [<c010145c>] (gic_handle_irq) from [<c010c694>] (__irq_svc+0x54/0x90)
> [  316.425382] Exception stack(0xdf45ff58 to 0xdf45ffa0)
> [  316.430456] ff40:                                                       00000001 00000000
> [  316.438676] ff60: 00009370 c0117c80 df45e000 c08024f8 c0802494 c081e2d6 c05b9550 413fc090
> [  316.446897] ff80: 00000000 df45ffb4 df45ffb8 df45ffa8 c01086b0 c01086b4 60000013 ffffffff
> [  316.455113]  r9:413fc090 r8:c05b9550 r7:df45ff8c r6:ffffffff r5:60000013 r4:c01086b4
> [  316.462916] [<c0108674>] (arch_cpu_idle) from [<c0155f3c>] (default_idle_call+0x28/0x34)
> [  316.471051] [<c0155f14>] (default_idle_call) from [<c0156070>] (cpu_startup_entry+0x128/0x17c)
> [  316.479709] [<c0155f48>] (cpu_startup_entry) from [<c010dc14>] (secondary_start_kernel+0x158/0x164)
> [  316.488799]  r7:c081e7c8 r4:c080b4f0
> [  316.492395] [<c010dabc>] (secondary_start_kernel) from [<8010158c>] (0x8010158c)
> [  316.499826]  r5:00000051 r4:9f44006a
> [  316.503430] ---[ end trace 2dd53d8e86a1a69b ]---

Adding linux-nfs in case it is NFS-related.
(I'm using an nfsroot file system, and the issue is triggered by
mounting an NFS file system.)

Similar warnings here:

http://thread.gmane.org/gmane.linux.kernel/2100812
WARNING: CPU: 1 PID: 81 at net/ipv4/af_inet.c:155 inet_sock_destruct+0x188/0x1dc()
(different call stack though)

https://www.spinics.net/lists/linux-nfs/msg58133.html
WARNING: CPU: 9 PID: 31049 at net/ipv4/af_inet.c:155 .inet_sock_destruct+0x170/0x220
(different call stack though)

http://thread.gmane.org/gmane.linux.network/134151
WARNING: at net/ipv4/af_inet.c:155 inet_sock_destruct+0x122/0x13a()
(different call stack though)

http://oops.kernel.org/oops/?function=inet_sock_destruct&bugline=155&search=submit

None of these seem to mention rcu_process_callbacks() in the call stack.

I can reproduce the warning systematically.
What can I do to pinpoint the root of the issue?

Regards.

^ permalink raw reply	[flat|nested] 5+ messages in thread

* WARNING: CPU: 0 PID: 0 at net/ipv4/af_inet.c:155 inet_sock_destruct+0x1c4/0x1dc
  2016-07-12  9:53     ` WARNING: CPU: 0 PID: 0 at net/ipv4/af_inet.c:155 inet_sock_destruct+0x1c4/0x1dc Mason
  2016-07-12 11:48       ` Mason
@ 2016-07-12 14:25       ` Eric Dumazet
  2016-07-12 14:38         ` Mason
  1 sibling, 1 reply; 5+ messages in thread
From: Eric Dumazet @ 2016-07-12 14:25 UTC (permalink / raw)
  To: linux-arm-kernel

On Tue, 2016-07-12 at 11:53 +0200, Mason wrote:
> On 05/07/2016 17:28, Florian Fainelli wrote:
> 
> > Le 05/07/2016 07:50, Mason wrote:
> > 
> >> On 05/07/2016 15:33, Mason wrote:
> >> 
> >>> I was testing suspend/resume sequences where the suspend operation
> >>> fails and returns without having suspended the platform.
> 
> Please forget I ever mentioned suspend, that was a red herring.
> The warning is displayed even if I never suspend.
> (Dropping linux-pm from this discussion.)
> 
> >> I rebooted, tried the same operation, and hit the same warning
> >> still 310 seconds later:
> 
> However, the 310 seconds time span still seems to be relevant.
> 
> Steps to reproduce: I booted the system, logged in as root,
> mounted an NFS file system, then left the system idling at
> the prompt.
> 
> (I don't remember seeing this warning in v4.1 and v4.4)
> 
> What's going wrong here? Is it related to NFS?
> 
> Here is the defconfig I'm using
> http://pastebin.ubuntu.com/19160299/
> 
> Regards.
> 

Could you try this debug patch ?

diff --git a/net/core/sock.c b/net/core/sock.c
index b7f12639c26a..7fb1aeadbda7 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1465,6 +1465,7 @@ static void __sk_destruct(struct rcu_head *head)
 
 void sk_destruct(struct sock *sk)
 {
+	WARN_ON_ONCE(sk->sk_forward_alloc);
 	if (sock_flag(sk, SOCK_RCU_FREE))
 		call_rcu(&sk->sk_rcu, __sk_destruct);
 	else

^ permalink raw reply related	[flat|nested] 5+ messages in thread

* WARNING: CPU: 0 PID: 0 at net/ipv4/af_inet.c:155 inet_sock_destruct+0x1c4/0x1dc
  2016-07-12 14:25       ` Eric Dumazet
@ 2016-07-12 14:38         ` Mason
  2016-07-13 12:11           ` Mason
  0 siblings, 1 reply; 5+ messages in thread
From: Mason @ 2016-07-12 14:38 UTC (permalink / raw)
  To: linux-arm-kernel

On 12/07/2016 16:25, Eric Dumazet wrote:

> Could you try this debug patch ?

Note: I've been unable to trigger the warning again. Dunno what has changed...

With your patch applied, I get a warning at boot:

[    4.668309] nb8800 26000.ethernet eth0: Link is Up - 1Gbps/Full - flow control rx/tx
[    4.688609] Sending DHCP requests ., OK
[    4.711935] IP-Config: Got DHCP answer from 172.27.200.1, my address is 172.27.64.49
[    4.719956] IP-Config: Complete:
[    4.723221]      device=eth0, hwaddr=00:16:e8:02:08:42, ipaddr=172.27.64.49, mask=255.255.192.0, gw=172.27.64.1
[    4.733376]      host=toto5, domain=france.foo.com sac.foo.com asic.foo.com soft.sde, nis-domain=france.foo.com
[    4.745279]      bootserver=172.27.64.1, rootserver=172.27.64.1, rootpath=/export/roots/titi/6_2_0_8756,v3     nameserver0=172.27.0.17
[    4.759725] ------------[ cut here ]------------
[    4.764426] WARNING: CPU: 0 PID: 877 at net/core/sock.c:1468 sk_destruct+0x74/0x78
[    4.772056] Modules linked in:
[    4.775133] CPU: 0 PID: 877 Comm: kworker/0:1H Not tainted 4.7.0-rc6-00010-gd07031bdc433-dirty #6
[    4.784050] Hardware name: Sigma Tango DT
[    4.788084] Workqueue: rpciod rpc_async_schedule
[    4.792725] Backtrace: 
[    4.795196] [<c010b974>] (dump_backtrace) from [<c010bb70>] (show_stack+0x18/0x1c)
[    4.802802]  r7:60000013 r6:c080ea84 r5:00000000 r4:c080ea84
[    4.808513] [<c010bb58>] (show_stack) from [<c02e9fe4>] (dump_stack+0x80/0x94)
[    4.815781] [<c02e9f64>] (dump_stack) from [<c011bfc8>] (__warn+0xec/0x104)
[    4.822776]  r7:00000009 r6:c05e4d04 r5:00000000 r4:00000000
[    4.828482] [<c011bedc>] (__warn) from [<c011c098>] (warn_slowpath_null+0x28/0x30)
[    4.836089]  r9:00000000 r8:df5edb58 r7:df711364 r6:df006c80 r5:df5edb58 r4:df5eda40
[    4.843898] [<c011c070>] (warn_slowpath_null) from [<c03fbd54>] (sk_destruct+0x74/0x78)
[    4.851945] [<c03fbce0>] (sk_destruct) from [<c03fbda8>] (__sk_free+0x50/0xbc)
[    4.859203]  r5:df5edb58 r4:df5eda40
[    4.862802] [<c03fbd58>] (__sk_free) from [<c03fbe50>] (sk_free+0x3c/0x40)
[    4.869710]  r5:df5edb58 r4:df5eda40
[    4.873310] [<c03fbe14>] (sk_free) from [<c03fbf80>] (sk_common_release+0xe8/0xf4)
[    4.880924] [<c03fbe98>] (sk_common_release) from [<c0467e50>] (udp_lib_close+0x10/0x14)
[    4.889054]  r5:df006c80 r4:df5eda40
[    4.892657] [<c0467e40>] (udp_lib_close) from [<c0473dbc>] (inet_release+0x4c/0x78)
[    4.900360] [<c0473d70>] (inet_release) from [<c03f605c>] (sock_release+0x28/0xa8)
[    4.907967]  r5:00000000 r4:df006c80
[    4.911575] [<c03f6034>] (sock_release) from [<c049a7f4>] (xs_reset_transport+0xac/0xbc)
[    4.919706]  r5:df5eda40 r4:df711000
[    4.923306] [<c049a748>] (xs_reset_transport) from [<c049a850>] (xs_destroy+0x24/0x54)
[    4.931262]  r9:00000000 r8:c049c614 r7:df7c3218 r6:df711000 r5:00000000 r4:df711000
[    4.939070] [<c049a82c>] (xs_destroy) from [<c0497c18>] (xprt_destroy+0x88/0x8c)
[    4.946502]  r5:df711218 r4:df711000
[    4.950102] [<c0497b90>] (xprt_destroy) from [<c0497c5c>] (xprt_put+0x40/0x44)
[    4.957358]  r5:df7c3200 r4:df613d00
[    4.960959] [<c0497c1c>] (xprt_put) from [<c04968e4>] (rpc_task_release_client+0x7c/0x80)
[    4.969181] [<c0496868>] (rpc_task_release_client) from [<c049c3ac>] (rpc_release_resources_task+0x34/0x38)
[    4.978971]  r7:c049c298 r6:00000001 r5:00000000 r4:df613d00
[    4.984674] [<c049c378>] (rpc_release_resources_task) from [<c049cdc8>] (__rpc_execute+0xb0/0x2a8)
[    4.993678]  r5:00000000 r4:df613d00
[    4.997277] [<c049cd18>] (__rpc_execute) from [<c049cfd4>] (rpc_async_schedule+0x14/0x18)
[    5.005496]  r10:df683500 r9:00000000 r8:dfbe4700 r7:00000000 r6:dfbdcc80 r5:df683500
[    5.013383]  r4:df613d24
[    5.015935] [<c049cfc0>] (rpc_async_schedule) from [<c0132640>] (process_one_work+0x128/0x3fc)
[    5.024595] [<c0132518>] (process_one_work) from [<c013296c>] (worker_thread+0x58/0x574)
[    5.032726]  r10:df683500 r9:df6d4000 r8:dfbdcc98 r7:c0802100 r6:00000008 r5:df683518
[    5.040614]  r4:dfbdcc80
[    5.043162] [<c0132914>] (worker_thread) from [<c0138470>] (kthread+0xe4/0xfc)
[    5.050419]  r10:00000000 r9:00000000 r8:00000000 r7:c0132914 r6:df683500 r5:df6cc600
[    5.058309]  r4:00000000
[    5.060858] [<c013838c>] (kthread) from [<c0107c18>] (ret_from_fork+0x14/0x3c)
[    5.068116]  r7:00000000 r6:00000000 r5:c013838c r4:df6cc600
[    5.073846] ---[ end trace 05b24e2dedd2f2a0 ]---
[    5.082009] VFS: Mounted root (nfs filesystem) readonly on device 0:11.
[    5.090328] Freeing unused kernel memory: 1024K (c0700000 - c0800000)
[    5.452552] random: udevd urandom read with 68 bits of entropy available

^ permalink raw reply	[flat|nested] 5+ messages in thread

* WARNING: CPU: 0 PID: 0 at net/ipv4/af_inet.c:155 inet_sock_destruct+0x1c4/0x1dc
  2016-07-12 14:38         ` Mason
@ 2016-07-13 12:11           ` Mason
  0 siblings, 0 replies; 5+ messages in thread
From: Mason @ 2016-07-13 12:11 UTC (permalink / raw)
  To: linux-arm-kernel

On 12/07/2016 16:38, Mason wrote:

> With Eric's patch applied, I get this warning at boot:
> 
> [    4.668309] nb8800 26000.ethernet eth0: Link is Up - 1Gbps/Full - flow control rx/tx
> [    4.688609] Sending DHCP requests ., OK
> [    4.711935] IP-Config: Got DHCP answer from 172.27.200.1, my address is 172.27.64.49
> [    4.719956] IP-Config: Complete:
> [    4.723221]      device=eth0, hwaddr=00:16:e8:02:08:42, ipaddr=172.27.64.49, mask=255.255.192.0, gw=172.27.64.1
> [    4.733376]      host=toto5, domain=france.foo.com sac.foo.com asic.foo.com soft.sde, nis-domain=france.foo.com
> [    4.745279]      bootserver=172.27.64.1, rootserver=172.27.64.1, rootpath=/export/roots/titi/6_2_0_8756,v3     nameserver0=172.27.0.17
> [    4.759725] ------------[ cut here ]------------
> [    4.764426] WARNING: CPU: 0 PID: 877 at net/core/sock.c:1468 sk_destruct+0x74/0x78
> [    4.772056] Modules linked in:
> [    4.775133] CPU: 0 PID: 877 Comm: kworker/0:1H Not tainted 4.7.0-rc6-00010-gd07031bdc433-dirty #6
> [    4.784050] Hardware name: Sigma Tango DT
> [    4.788084] Workqueue: rpciod rpc_async_schedule
> [    4.792725] Backtrace: 
> [    4.795196] [<c010b974>] (dump_backtrace) from [<c010bb70>] (show_stack+0x18/0x1c)
> [    4.802802]  r7:60000013 r6:c080ea84 r5:00000000 r4:c080ea84
> [    4.808513] [<c010bb58>] (show_stack) from [<c02e9fe4>] (dump_stack+0x80/0x94)
> [    4.815781] [<c02e9f64>] (dump_stack) from [<c011bfc8>] (__warn+0xec/0x104)
> [    4.822776]  r7:00000009 r6:c05e4d04 r5:00000000 r4:00000000
> [    4.828482] [<c011bedc>] (__warn) from [<c011c098>] (warn_slowpath_null+0x28/0x30)
> [    4.836089]  r9:00000000 r8:df5edb58 r7:df711364 r6:df006c80 r5:df5edb58 r4:df5eda40
> [    4.843898] [<c011c070>] (warn_slowpath_null) from [<c03fbd54>] (sk_destruct+0x74/0x78)
> [    4.851945] [<c03fbce0>] (sk_destruct) from [<c03fbda8>] (__sk_free+0x50/0xbc)
> [    4.859203]  r5:df5edb58 r4:df5eda40
> [    4.862802] [<c03fbd58>] (__sk_free) from [<c03fbe50>] (sk_free+0x3c/0x40)
> [    4.869710]  r5:df5edb58 r4:df5eda40
> [    4.873310] [<c03fbe14>] (sk_free) from [<c03fbf80>] (sk_common_release+0xe8/0xf4)
> [    4.880924] [<c03fbe98>] (sk_common_release) from [<c0467e50>] (udp_lib_close+0x10/0x14)
> [    4.889054]  r5:df006c80 r4:df5eda40
> [    4.892657] [<c0467e40>] (udp_lib_close) from [<c0473dbc>] (inet_release+0x4c/0x78)
> [    4.900360] [<c0473d70>] (inet_release) from [<c03f605c>] (sock_release+0x28/0xa8)
> [    4.907967]  r5:00000000 r4:df006c80
> [    4.911575] [<c03f6034>] (sock_release) from [<c049a7f4>] (xs_reset_transport+0xac/0xbc)
> [    4.919706]  r5:df5eda40 r4:df711000
> [    4.923306] [<c049a748>] (xs_reset_transport) from [<c049a850>] (xs_destroy+0x24/0x54)
> [    4.931262]  r9:00000000 r8:c049c614 r7:df7c3218 r6:df711000 r5:00000000 r4:df711000
> [    4.939070] [<c049a82c>] (xs_destroy) from [<c0497c18>] (xprt_destroy+0x88/0x8c)
> [    4.946502]  r5:df711218 r4:df711000
> [    4.950102] [<c0497b90>] (xprt_destroy) from [<c0497c5c>] (xprt_put+0x40/0x44)
> [    4.957358]  r5:df7c3200 r4:df613d00
> [    4.960959] [<c0497c1c>] (xprt_put) from [<c04968e4>] (rpc_task_release_client+0x7c/0x80)
> [    4.969181] [<c0496868>] (rpc_task_release_client) from [<c049c3ac>] (rpc_release_resources_task+0x34/0x38)
> [    4.978971]  r7:c049c298 r6:00000001 r5:00000000 r4:df613d00
> [    4.984674] [<c049c378>] (rpc_release_resources_task) from [<c049cdc8>] (__rpc_execute+0xb0/0x2a8)
> [    4.993678]  r5:00000000 r4:df613d00
> [    4.997277] [<c049cd18>] (__rpc_execute) from [<c049cfd4>] (rpc_async_schedule+0x14/0x18)
> [    5.005496]  r10:df683500 r9:00000000 r8:dfbe4700 r7:00000000 r6:dfbdcc80 r5:df683500
> [    5.013383]  r4:df613d24
> [    5.015935] [<c049cfc0>] (rpc_async_schedule) from [<c0132640>] (process_one_work+0x128/0x3fc)
> [    5.024595] [<c0132518>] (process_one_work) from [<c013296c>] (worker_thread+0x58/0x574)
> [    5.032726]  r10:df683500 r9:df6d4000 r8:dfbdcc98 r7:c0802100 r6:00000008 r5:df683518
> [    5.040614]  r4:dfbdcc80
> [    5.043162] [<c0132914>] (worker_thread) from [<c0138470>] (kthread+0xe4/0xfc)
> [    5.050419]  r10:00000000 r9:00000000 r8:00000000 r7:c0132914 r6:df683500 r5:df6cc600
> [    5.058309]  r4:00000000
> [    5.060858] [<c013838c>] (kthread) from [<c0107c18>] (ret_from_fork+0x14/0x3c)
> [    5.068116]  r7:00000000 r6:00000000 r5:c013838c r4:df6cc600
> [    5.073846] ---[ end trace 05b24e2dedd2f2a0 ]---
> [    5.082009] VFS: Mounted root (nfs filesystem) readonly on device 0:11.
> [    5.090328] Freeing unused kernel memory: 1024K (c0700000 - c0800000)
> [    5.452552] random: udevd urandom read with 68 bits of entropy available

AFAICT, I get the same call stack for every boot.

Is this an unexpected call sequence?

Are there other tests I can run?

Regards.

^ permalink raw reply	[flat|nested] 5+ messages in thread

end of thread, other threads:[~2016-07-13 12:11 UTC | newest]

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2016-07-12  9:53     ` WARNING: CPU: 0 PID: 0 at net/ipv4/af_inet.c:155 inet_sock_destruct+0x1c4/0x1dc Mason
2016-07-12 11:48       ` Mason
2016-07-12 14:25       ` Eric Dumazet
2016-07-12 14:38         ` Mason
2016-07-13 12:11           ` Mason

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