* INFO: rcu detected stall in snd_pcm_stream_lock_irq
@ 2018-04-06 13:24 syzbot
2018-04-06 13:32 ` Dmitry Vyukov
0 siblings, 1 reply; 5+ messages in thread
From: syzbot @ 2018-04-06 13:24 UTC (permalink / raw)
To: akpm, aryabinin, dvyukov, gregkh, linux-kernel, mark.rutland,
syzkaller-bugs, tchibo
Hello,
syzbot hit the following crash on upstream commit
38c23685b273cfb4ccf31a199feccce3bdcb5d83 (Fri Apr 6 04:29:35 2018 +0000)
Merge tag 'armsoc-drivers' of
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
syzbot dashboard link:
https://syzkaller.appspot.com/bug?extid=74e011b2046f4322d178
Unfortunately, I don't have any reproducer for this crash yet.
Raw console output:
https://syzkaller.appspot.com/x/log.txt?id=4582053840420864
Kernel config:
https://syzkaller.appspot.com/x/.config?id=-5813481738265533882
compiler: gcc (GCC) 8.0.1 20180301 (experimental)
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+74e011b2046f4322d178@syzkaller.appspotmail.com
It will help syzbot understand when the bug is fixed. See footer for
details.
If you forward the report, please keep this part and the footer.
syz-executor1 (6140) used greatest stack depth: 11720 bytes left
INFO: rcu_sched self-detected stall on CPU
1-....: (124998 ticks this GP) idle=0b2/1/4611686018427387906
softirq=15730/15730 fqs=31205
(t=125000 jiffies g=8316 c=8315 q=1529)
NMI backtrace for cpu 1
CPU: 1 PID: 6087 Comm: syz-executor0 Not tainted 4.16.0+ #3
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1b9/0x294 lib/dump_stack.c:113
nmi_cpu_backtrace.cold.4+0x19/0xce lib/nmi_backtrace.c:103
nmi_trigger_cpumask_backtrace+0x151/0x192 lib/nmi_backtrace.c:62
arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
trigger_single_cpu_backtrace include/linux/nmi.h:156 [inline]
rcu_dump_cpu_stacks+0x175/0x1c2 kernel/rcu/tree.c:1376
print_cpu_stall kernel/rcu/tree.c:1525 [inline]
check_cpu_stall.isra.61.cold.80+0x36c/0x59a kernel/rcu/tree.c:1593
__rcu_pending kernel/rcu/tree.c:3356 [inline]
rcu_pending kernel/rcu/tree.c:3401 [inline]
rcu_check_callbacks+0x21b/0xad0 kernel/rcu/tree.c:2763
update_process_times+0x2d/0x70 kernel/time/timer.c:1636
tick_sched_handle+0xa0/0x180 kernel/time/tick-sched.c:171
tick_sched_timer+0x42/0x130 kernel/time/tick-sched.c:1179
__run_hrtimer kernel/time/hrtimer.c:1337 [inline]
__hrtimer_run_queues+0x3e3/0x10a0 kernel/time/hrtimer.c:1399
hrtimer_interrupt+0x286/0x650 kernel/time/hrtimer.c:1457
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1025 [inline]
smp_apic_timer_interrupt+0x15d/0x710 arch/x86/kernel/apic/apic.c:1050
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:862
</IRQ>
RIP: 0010:__sanitizer_cov_trace_pc+0x3f/0x50 kernel/kcov.c:106
RSP: 0018:ffff8801920cf4d0 EFLAGS: 00000216 ORIG_RAX: ffffffffffffff13
RAX: 0000000000040000 RBX: ffff8801ceb61200 RCX: ffffc90001eb0000
RDX: 0000000000040000 RSI: ffffffff859d760f RDI: ffff8801ceb61200
RBP: ffff8801920cf4d0 R08: ffff8801b4946540 R09: 0000000000000006
R10: ffff8801b4946540 R11: 0000000000000000 R12: ffffffff8826fa20
R13: 0000000000000020 R14: ffff8801d3008c00 R15: ffff8801ceb61200
snd_pcm_stream_lock_irq+0xf/0xf0 sound/core/pcm_native.c:150
__snd_pcm_lib_xfer+0x345/0x1d10 sound/core/pcm_lib.c:2162
snd_pcm_oss_write3+0xe9/0x220 sound/core/oss/pcm_oss.c:1236
io_playback_transfer+0x274/0x310 sound/core/oss/io.c:47
snd_pcm_plug_write_transfer+0x36c/0x470 sound/core/oss/pcm_plugin.c:619
snd_pcm_oss_write2+0x25c/0x460 sound/core/oss/pcm_oss.c:1365
snd_pcm_oss_write1 sound/core/oss/pcm_oss.c:1431 [inline]
snd_pcm_oss_write+0x55f/0xa20 sound/core/oss/pcm_oss.c:2774
do_loop_readv_writev fs/read_write.c:703 [inline]
do_iter_write+0x491/0x5f0 fs/read_write.c:961
vfs_writev+0x1c7/0x330 fs/read_write.c:1004
do_writev+0x112/0x2f0 fs/read_write.c:1039
SYSC_writev fs/read_write.c:1112 [inline]
SyS_writev+0x27/0x30 fs/read_write.c:1109
do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x4552d9
RSP: 002b:00007f82ef52cc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 00007f82ef52d6d4 RCX: 00000000004552d9
RDX: 0000000000000001 RSI: 0000000020000180 RDI: 0000000000000015
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000006cc R14: 00000000006fd3c0 R15: 0000000000000000
---
This bug is generated by a dumb bot. It may contain errors.
See https://goo.gl/tpsmEJ for details.
Direct all questions to syzkaller@googlegroups.com.
syzbot will keep track of this bug report.
If you forgot to add the Reported-by tag, once the fix for this bug is
merged
into any tree, please reply to this email with:
#syz fix: exact-commit-title
To mark this as a duplicate of another syzbot report, please reply with:
#syz dup: exact-subject-of-another-report
If it's a one-off invalid bug report, please reply with:
#syz invalid
Note: if the crash happens again, it will cause creation of a new bug
report.
Note: all commands must start from beginning of the line in the email body.
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: INFO: rcu detected stall in snd_pcm_stream_lock_irq
2018-04-06 13:24 INFO: rcu detected stall in snd_pcm_stream_lock_irq syzbot
@ 2018-04-06 13:32 ` Dmitry Vyukov
0 siblings, 0 replies; 5+ messages in thread
From: Dmitry Vyukov @ 2018-04-06 13:32 UTC (permalink / raw)
To: syzbot, Jaroslav Kysela, Takashi Sakamoto, alsa-devel
Cc: LKML, syzkaller-bugs
On Fri, Apr 6, 2018 at 3:24 PM, syzbot
<syzbot+74e011b2046f4322d178@syzkaller.appspotmail.com> wrote:
> Hello,
>
> syzbot hit the following crash on upstream commit
> 38c23685b273cfb4ccf31a199feccce3bdcb5d83 (Fri Apr 6 04:29:35 2018 +0000)
> Merge tag 'armsoc-drivers' of
> git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
> syzbot dashboard link:
> https://syzkaller.appspot.com/bug?extid=74e011b2046f4322d178
>
> Unfortunately, I don't have any reproducer for this crash yet.
> Raw console output:
> https://syzkaller.appspot.com/x/log.txt?id=4582053840420864
> Kernel config:
> https://syzkaller.appspot.com/x/.config?id=-5813481738265533882
> compiler: gcc (GCC) 8.0.1 20180301 (experimental)
+ALSA maintainers
This was misattributed to kcov.c, I will fix it.
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+74e011b2046f4322d178@syzkaller.appspotmail.com
> It will help syzbot understand when the bug is fixed. See footer for
> details.
> If you forward the report, please keep this part and the footer.
>
> syz-executor1 (6140) used greatest stack depth: 11720 bytes left
> INFO: rcu_sched self-detected stall on CPU
> 1-....: (124998 ticks this GP) idle=0b2/1/4611686018427387906
> softirq=15730/15730 fqs=31205
> (t=125000 jiffies g=8316 c=8315 q=1529)
> NMI backtrace for cpu 1
> CPU: 1 PID: 6087 Comm: syz-executor0 Not tainted 4.16.0+ #3
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
> Google 01/01/2011
> Call Trace:
> <IRQ>
> __dump_stack lib/dump_stack.c:77 [inline]
> dump_stack+0x1b9/0x294 lib/dump_stack.c:113
> nmi_cpu_backtrace.cold.4+0x19/0xce lib/nmi_backtrace.c:103
> nmi_trigger_cpumask_backtrace+0x151/0x192 lib/nmi_backtrace.c:62
> arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
> trigger_single_cpu_backtrace include/linux/nmi.h:156 [inline]
> rcu_dump_cpu_stacks+0x175/0x1c2 kernel/rcu/tree.c:1376
> print_cpu_stall kernel/rcu/tree.c:1525 [inline]
> check_cpu_stall.isra.61.cold.80+0x36c/0x59a kernel/rcu/tree.c:1593
> __rcu_pending kernel/rcu/tree.c:3356 [inline]
> rcu_pending kernel/rcu/tree.c:3401 [inline]
> rcu_check_callbacks+0x21b/0xad0 kernel/rcu/tree.c:2763
> update_process_times+0x2d/0x70 kernel/time/timer.c:1636
> tick_sched_handle+0xa0/0x180 kernel/time/tick-sched.c:171
> tick_sched_timer+0x42/0x130 kernel/time/tick-sched.c:1179
> __run_hrtimer kernel/time/hrtimer.c:1337 [inline]
> __hrtimer_run_queues+0x3e3/0x10a0 kernel/time/hrtimer.c:1399
> hrtimer_interrupt+0x286/0x650 kernel/time/hrtimer.c:1457
> local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1025 [inline]
> smp_apic_timer_interrupt+0x15d/0x710 arch/x86/kernel/apic/apic.c:1050
> apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:862
> </IRQ>
> RIP: 0010:__sanitizer_cov_trace_pc+0x3f/0x50 kernel/kcov.c:106
> RSP: 0018:ffff8801920cf4d0 EFLAGS: 00000216 ORIG_RAX: ffffffffffffff13
> RAX: 0000000000040000 RBX: ffff8801ceb61200 RCX: ffffc90001eb0000
> RDX: 0000000000040000 RSI: ffffffff859d760f RDI: ffff8801ceb61200
> RBP: ffff8801920cf4d0 R08: ffff8801b4946540 R09: 0000000000000006
> R10: ffff8801b4946540 R11: 0000000000000000 R12: ffffffff8826fa20
> R13: 0000000000000020 R14: ffff8801d3008c00 R15: ffff8801ceb61200
> snd_pcm_stream_lock_irq+0xf/0xf0 sound/core/pcm_native.c:150
> __snd_pcm_lib_xfer+0x345/0x1d10 sound/core/pcm_lib.c:2162
> snd_pcm_oss_write3+0xe9/0x220 sound/core/oss/pcm_oss.c:1236
> io_playback_transfer+0x274/0x310 sound/core/oss/io.c:47
> snd_pcm_plug_write_transfer+0x36c/0x470 sound/core/oss/pcm_plugin.c:619
> snd_pcm_oss_write2+0x25c/0x460 sound/core/oss/pcm_oss.c:1365
> snd_pcm_oss_write1 sound/core/oss/pcm_oss.c:1431 [inline]
> snd_pcm_oss_write+0x55f/0xa20 sound/core/oss/pcm_oss.c:2774
> do_loop_readv_writev fs/read_write.c:703 [inline]
> do_iter_write+0x491/0x5f0 fs/read_write.c:961
> vfs_writev+0x1c7/0x330 fs/read_write.c:1004
> do_writev+0x112/0x2f0 fs/read_write.c:1039
> SYSC_writev fs/read_write.c:1112 [inline]
> SyS_writev+0x27/0x30 fs/read_write.c:1109
> do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287
> entry_SYSCALL_64_after_hwframe+0x42/0xb7
> RIP: 0033:0x4552d9
> RSP: 002b:00007f82ef52cc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
> RAX: ffffffffffffffda RBX: 00007f82ef52d6d4 RCX: 00000000004552d9
> RDX: 0000000000000001 RSI: 0000000020000180 RDI: 0000000000000015
> RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
> R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
> R13: 00000000000006cc R14: 00000000006fd3c0 R15: 0000000000000000
>
>
> ---
> This bug is generated by a dumb bot. It may contain errors.
> See https://goo.gl/tpsmEJ for details.
> Direct all questions to syzkaller@googlegroups.com.
>
> syzbot will keep track of this bug report.
> If you forgot to add the Reported-by tag, once the fix for this bug is
> merged
> into any tree, please reply to this email with:
> #syz fix: exact-commit-title
> To mark this as a duplicate of another syzbot report, please reply with:
> #syz dup: exact-subject-of-another-report
> If it's a one-off invalid bug report, please reply with:
> #syz invalid
> Note: if the crash happens again, it will cause creation of a new bug
> report.
> Note: all commands must start from beginning of the line in the email body.
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: INFO: rcu detected stall in snd_pcm_stream_lock_irq
@ 2018-04-06 13:32 ` Dmitry Vyukov
0 siblings, 0 replies; 5+ messages in thread
From: Dmitry Vyukov @ 2018-04-06 13:32 UTC (permalink / raw)
To: syzbot, Jaroslav Kysela, Takashi Sakamoto, alsa-devel
Cc: syzkaller-bugs, LKML
On Fri, Apr 6, 2018 at 3:24 PM, syzbot
<syzbot+74e011b2046f4322d178@syzkaller.appspotmail.com> wrote:
> Hello,
>
> syzbot hit the following crash on upstream commit
> 38c23685b273cfb4ccf31a199feccce3bdcb5d83 (Fri Apr 6 04:29:35 2018 +0000)
> Merge tag 'armsoc-drivers' of
> git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
> syzbot dashboard link:
> https://syzkaller.appspot.com/bug?extid=74e011b2046f4322d178
>
> Unfortunately, I don't have any reproducer for this crash yet.
> Raw console output:
> https://syzkaller.appspot.com/x/log.txt?id=4582053840420864
> Kernel config:
> https://syzkaller.appspot.com/x/.config?id=-5813481738265533882
> compiler: gcc (GCC) 8.0.1 20180301 (experimental)
+ALSA maintainers
This was misattributed to kcov.c, I will fix it.
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+74e011b2046f4322d178@syzkaller.appspotmail.com
> It will help syzbot understand when the bug is fixed. See footer for
> details.
> If you forward the report, please keep this part and the footer.
>
> syz-executor1 (6140) used greatest stack depth: 11720 bytes left
> INFO: rcu_sched self-detected stall on CPU
> 1-....: (124998 ticks this GP) idle=0b2/1/4611686018427387906
> softirq=15730/15730 fqs=31205
> (t=125000 jiffies g=8316 c=8315 q=1529)
> NMI backtrace for cpu 1
> CPU: 1 PID: 6087 Comm: syz-executor0 Not tainted 4.16.0+ #3
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
> Google 01/01/2011
> Call Trace:
> <IRQ>
> __dump_stack lib/dump_stack.c:77 [inline]
> dump_stack+0x1b9/0x294 lib/dump_stack.c:113
> nmi_cpu_backtrace.cold.4+0x19/0xce lib/nmi_backtrace.c:103
> nmi_trigger_cpumask_backtrace+0x151/0x192 lib/nmi_backtrace.c:62
> arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
> trigger_single_cpu_backtrace include/linux/nmi.h:156 [inline]
> rcu_dump_cpu_stacks+0x175/0x1c2 kernel/rcu/tree.c:1376
> print_cpu_stall kernel/rcu/tree.c:1525 [inline]
> check_cpu_stall.isra.61.cold.80+0x36c/0x59a kernel/rcu/tree.c:1593
> __rcu_pending kernel/rcu/tree.c:3356 [inline]
> rcu_pending kernel/rcu/tree.c:3401 [inline]
> rcu_check_callbacks+0x21b/0xad0 kernel/rcu/tree.c:2763
> update_process_times+0x2d/0x70 kernel/time/timer.c:1636
> tick_sched_handle+0xa0/0x180 kernel/time/tick-sched.c:171
> tick_sched_timer+0x42/0x130 kernel/time/tick-sched.c:1179
> __run_hrtimer kernel/time/hrtimer.c:1337 [inline]
> __hrtimer_run_queues+0x3e3/0x10a0 kernel/time/hrtimer.c:1399
> hrtimer_interrupt+0x286/0x650 kernel/time/hrtimer.c:1457
> local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1025 [inline]
> smp_apic_timer_interrupt+0x15d/0x710 arch/x86/kernel/apic/apic.c:1050
> apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:862
> </IRQ>
> RIP: 0010:__sanitizer_cov_trace_pc+0x3f/0x50 kernel/kcov.c:106
> RSP: 0018:ffff8801920cf4d0 EFLAGS: 00000216 ORIG_RAX: ffffffffffffff13
> RAX: 0000000000040000 RBX: ffff8801ceb61200 RCX: ffffc90001eb0000
> RDX: 0000000000040000 RSI: ffffffff859d760f RDI: ffff8801ceb61200
> RBP: ffff8801920cf4d0 R08: ffff8801b4946540 R09: 0000000000000006
> R10: ffff8801b4946540 R11: 0000000000000000 R12: ffffffff8826fa20
> R13: 0000000000000020 R14: ffff8801d3008c00 R15: ffff8801ceb61200
> snd_pcm_stream_lock_irq+0xf/0xf0 sound/core/pcm_native.c:150
> __snd_pcm_lib_xfer+0x345/0x1d10 sound/core/pcm_lib.c:2162
> snd_pcm_oss_write3+0xe9/0x220 sound/core/oss/pcm_oss.c:1236
> io_playback_transfer+0x274/0x310 sound/core/oss/io.c:47
> snd_pcm_plug_write_transfer+0x36c/0x470 sound/core/oss/pcm_plugin.c:619
> snd_pcm_oss_write2+0x25c/0x460 sound/core/oss/pcm_oss.c:1365
> snd_pcm_oss_write1 sound/core/oss/pcm_oss.c:1431 [inline]
> snd_pcm_oss_write+0x55f/0xa20 sound/core/oss/pcm_oss.c:2774
> do_loop_readv_writev fs/read_write.c:703 [inline]
> do_iter_write+0x491/0x5f0 fs/read_write.c:961
> vfs_writev+0x1c7/0x330 fs/read_write.c:1004
> do_writev+0x112/0x2f0 fs/read_write.c:1039
> SYSC_writev fs/read_write.c:1112 [inline]
> SyS_writev+0x27/0x30 fs/read_write.c:1109
> do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287
> entry_SYSCALL_64_after_hwframe+0x42/0xb7
> RIP: 0033:0x4552d9
> RSP: 002b:00007f82ef52cc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
> RAX: ffffffffffffffda RBX: 00007f82ef52d6d4 RCX: 00000000004552d9
> RDX: 0000000000000001 RSI: 0000000020000180 RDI: 0000000000000015
> RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
> R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
> R13: 00000000000006cc R14: 00000000006fd3c0 R15: 0000000000000000
>
>
> ---
> This bug is generated by a dumb bot. It may contain errors.
> See https://goo.gl/tpsmEJ for details.
> Direct all questions to syzkaller@googlegroups.com.
>
> syzbot will keep track of this bug report.
> If you forgot to add the Reported-by tag, once the fix for this bug is
> merged
> into any tree, please reply to this email with:
> #syz fix: exact-commit-title
> To mark this as a duplicate of another syzbot report, please reply with:
> #syz dup: exact-subject-of-another-report
> If it's a one-off invalid bug report, please reply with:
> #syz invalid
> Note: if the crash happens again, it will cause creation of a new bug
> report.
> Note: all commands must start from beginning of the line in the email body.
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: INFO: rcu detected stall in snd_pcm_stream_lock_irq
2018-04-06 13:32 ` Dmitry Vyukov
(?)
@ 2018-04-07 11:57 ` Dmitry Vyukov
2018-04-07 11:58 ` syzbot
-1 siblings, 1 reply; 5+ messages in thread
From: Dmitry Vyukov @ 2018-04-07 11:57 UTC (permalink / raw)
To: syzbot, Jaroslav Kysela, Takashi Sakamoto, alsa-devel
#syz dup: INFO: rcu detected stall in io_playback_transfer
On Fri, Apr 6, 2018 at 3:32 PM, Dmitry Vyukov <dvyukov@google.com> wrote:
> On Fri, Apr 6, 2018 at 3:24 PM, syzbot
> <syzbot+74e011b2046f4322d178@syzkaller.appspotmail.com> wrote:
>> Hello,
>>
>> syzbot hit the following crash on upstream commit
>> 38c23685b273cfb4ccf31a199feccce3bdcb5d83 (Fri Apr 6 04:29:35 2018 +0000)
>> Merge tag 'armsoc-drivers' of
>> git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
>> syzbot dashboard link:
>> https://syzkaller.appspot.com/bug?extid=74e011b2046f4322d178
>>
>> Unfortunately, I don't have any reproducer for this crash yet.
>> Raw console output:
>> https://syzkaller.appspot.com/x/log.txt?id=4582053840420864
>> Kernel config:
>> https://syzkaller.appspot.com/x/.config?id=-5813481738265533882
>> compiler: gcc (GCC) 8.0.1 20180301 (experimental)
>
> +ALSA maintainers
> This was misattributed to kcov.c, I will fix it.
>
>> IMPORTANT: if you fix the bug, please add the following tag to the commit:
>> Reported-by: syzbot+74e011b2046f4322d178@syzkaller.appspotmail.com
>> It will help syzbot understand when the bug is fixed. See footer for
>> details.
>> If you forward the report, please keep this part and the footer.
>>
>> syz-executor1 (6140) used greatest stack depth: 11720 bytes left
>> INFO: rcu_sched self-detected stall on CPU
>> 1-....: (124998 ticks this GP) idle=0b2/1/4611686018427387906
>> softirq=15730/15730 fqs=31205
>> (t=125000 jiffies g=8316 c=8315 q=1529)
>> NMI backtrace for cpu 1
>> CPU: 1 PID: 6087 Comm: syz-executor0 Not tainted 4.16.0+ #3
>> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
>> Google 01/01/2011
>> Call Trace:
>> <IRQ>
>> __dump_stack lib/dump_stack.c:77 [inline]
>> dump_stack+0x1b9/0x294 lib/dump_stack.c:113
>> nmi_cpu_backtrace.cold.4+0x19/0xce lib/nmi_backtrace.c:103
>> nmi_trigger_cpumask_backtrace+0x151/0x192 lib/nmi_backtrace.c:62
>> arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
>> trigger_single_cpu_backtrace include/linux/nmi.h:156 [inline]
>> rcu_dump_cpu_stacks+0x175/0x1c2 kernel/rcu/tree.c:1376
>> print_cpu_stall kernel/rcu/tree.c:1525 [inline]
>> check_cpu_stall.isra.61.cold.80+0x36c/0x59a kernel/rcu/tree.c:1593
>> __rcu_pending kernel/rcu/tree.c:3356 [inline]
>> rcu_pending kernel/rcu/tree.c:3401 [inline]
>> rcu_check_callbacks+0x21b/0xad0 kernel/rcu/tree.c:2763
>> update_process_times+0x2d/0x70 kernel/time/timer.c:1636
>> tick_sched_handle+0xa0/0x180 kernel/time/tick-sched.c:171
>> tick_sched_timer+0x42/0x130 kernel/time/tick-sched.c:1179
>> __run_hrtimer kernel/time/hrtimer.c:1337 [inline]
>> __hrtimer_run_queues+0x3e3/0x10a0 kernel/time/hrtimer.c:1399
>> hrtimer_interrupt+0x286/0x650 kernel/time/hrtimer.c:1457
>> local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1025 [inline]
>> smp_apic_timer_interrupt+0x15d/0x710 arch/x86/kernel/apic/apic.c:1050
>> apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:862
>> </IRQ>
>> RIP: 0010:__sanitizer_cov_trace_pc+0x3f/0x50 kernel/kcov.c:106
>> RSP: 0018:ffff8801920cf4d0 EFLAGS: 00000216 ORIG_RAX: ffffffffffffff13
>> RAX: 0000000000040000 RBX: ffff8801ceb61200 RCX: ffffc90001eb0000
>> RDX: 0000000000040000 RSI: ffffffff859d760f RDI: ffff8801ceb61200
>> RBP: ffff8801920cf4d0 R08: ffff8801b4946540 R09: 0000000000000006
>> R10: ffff8801b4946540 R11: 0000000000000000 R12: ffffffff8826fa20
>> R13: 0000000000000020 R14: ffff8801d3008c00 R15: ffff8801ceb61200
>> snd_pcm_stream_lock_irq+0xf/0xf0 sound/core/pcm_native.c:150
>> __snd_pcm_lib_xfer+0x345/0x1d10 sound/core/pcm_lib.c:2162
>> snd_pcm_oss_write3+0xe9/0x220 sound/core/oss/pcm_oss.c:1236
>> io_playback_transfer+0x274/0x310 sound/core/oss/io.c:47
>> snd_pcm_plug_write_transfer+0x36c/0x470 sound/core/oss/pcm_plugin.c:619
>> snd_pcm_oss_write2+0x25c/0x460 sound/core/oss/pcm_oss.c:1365
>> snd_pcm_oss_write1 sound/core/oss/pcm_oss.c:1431 [inline]
>> snd_pcm_oss_write+0x55f/0xa20 sound/core/oss/pcm_oss.c:2774
>> do_loop_readv_writev fs/read_write.c:703 [inline]
>> do_iter_write+0x491/0x5f0 fs/read_write.c:961
>> vfs_writev+0x1c7/0x330 fs/read_write.c:1004
>> do_writev+0x112/0x2f0 fs/read_write.c:1039
>> SYSC_writev fs/read_write.c:1112 [inline]
>> SyS_writev+0x27/0x30 fs/read_write.c:1109
>> do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287
>> entry_SYSCALL_64_after_hwframe+0x42/0xb7
>> RIP: 0033:0x4552d9
>> RSP: 002b:00007f82ef52cc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
>> RAX: ffffffffffffffda RBX: 00007f82ef52d6d4 RCX: 00000000004552d9
>> RDX: 0000000000000001 RSI: 0000000020000180 RDI: 0000000000000015
>> RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
>> R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
>> R13: 00000000000006cc R14: 00000000006fd3c0 R15: 0000000000000000
>>
>>
>> ---
>> This bug is generated by a dumb bot. It may contain errors.
>> See https://goo.gl/tpsmEJ for details.
>> Direct all questions to syzkaller@googlegroups.com.
>>
>> syzbot will keep track of this bug report.
>> If you forgot to add the Reported-by tag, once the fix for this bug is
>> merged
>> into any tree, please reply to this email with:
>> #syz fix: exact-commit-title
>> To mark this as a duplicate of another syzbot report, please reply with:
>> #syz dup: exact-subject-of-another-report
>> If it's a one-off invalid bug report, please reply with:
>> #syz invalid
>> Note: if the crash happens again, it will cause creation of a new bug
>> report.
>> Note: all commands must start from beginning of the line in the email body.
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: INFO: rcu detected stall in snd_pcm_stream_lock_irq
2018-04-07 11:57 ` Dmitry Vyukov
@ 2018-04-07 11:58 ` syzbot
0 siblings, 0 replies; 5+ messages in thread
From: syzbot @ 2018-04-07 11:58 UTC (permalink / raw)
Cc: alsa-devel, syzkaller-bugs, dvyukov, o-takashi
> #syz dup: INFO: rcu detected stall in io_playback_transfer
Your 'dup:' command is accepted, but please keep
syzkaller-bugs@googlegroups.com mailing list in CC next time. It serves as
a history of what happened with each bug report. Thank you.
> On Fri, Apr 6, 2018 at 3:32 PM, Dmitry Vyukov <dvyukov@google.com> wrote:
>> On Fri, Apr 6, 2018 at 3:24 PM, syzbot
>> <syzbot+74e011b2046f4322d178@syzkaller.appspotmail.com> wrote:
>>> Hello,
>>> syzbot hit the following crash on upstream commit
>>> 38c23685b273cfb4ccf31a199feccce3bdcb5d83 (Fri Apr 6 04:29:35 2018 +0000)
>>> Merge tag 'armsoc-drivers' of
>>> git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
>>> syzbot dashboard link:
>>> https://syzkaller.appspot.com/bug?extid=74e011b2046f4322d178
>>> Unfortunately, I don't have any reproducer for this crash yet.
>>> Raw console output:
>>> https://syzkaller.appspot.com/x/log.txt?id=4582053840420864
>>> Kernel config:
>>> https://syzkaller.appspot.com/x/.config?id=-5813481738265533882
>>> compiler: gcc (GCC) 8.0.1 20180301 (experimental)
>> +ALSA maintainers
>> This was misattributed to kcov.c, I will fix it.
>>> IMPORTANT: if you fix the bug, please add the following tag to the
>>> commit:
>>> Reported-by: syzbot+74e011b2046f4322d178@syzkaller.appspotmail.com
>>> It will help syzbot understand when the bug is fixed. See footer for
>>> details.
>>> If you forward the report, please keep this part and the footer.
>>> syz-executor1 (6140) used greatest stack depth: 11720 bytes left
>>> INFO: rcu_sched self-detected stall on CPU
>>> 1-....: (124998 ticks this GP) idle=0b2/1/4611686018427387906
>>> softirq=15730/15730 fqs=31205
>>> (t=125000 jiffies g=8316 c=8315 q=1529)
>>> NMI backtrace for cpu 1
>>> CPU: 1 PID: 6087 Comm: syz-executor0 Not tainted 4.16.0+ #3
>>> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
>>> Google 01/01/2011
>>> Call Trace:
>>> <IRQ>
>>> __dump_stack lib/dump_stack.c:77 [inline]
>>> dump_stack+0x1b9/0x294 lib/dump_stack.c:113
>>> nmi_cpu_backtrace.cold.4+0x19/0xce lib/nmi_backtrace.c:103
>>> nmi_trigger_cpumask_backtrace+0x151/0x192 lib/nmi_backtrace.c:62
>>> arch_trigger_cpumask_backtrace+0x14/0x20
>>> arch/x86/kernel/apic/hw_nmi.c:38
>>> trigger_single_cpu_backtrace include/linux/nmi.h:156 [inline]
>>> rcu_dump_cpu_stacks+0x175/0x1c2 kernel/rcu/tree.c:1376
>>> print_cpu_stall kernel/rcu/tree.c:1525 [inline]
>>> check_cpu_stall.isra.61.cold.80+0x36c/0x59a kernel/rcu/tree.c:1593
>>> __rcu_pending kernel/rcu/tree.c:3356 [inline]
>>> rcu_pending kernel/rcu/tree.c:3401 [inline]
>>> rcu_check_callbacks+0x21b/0xad0 kernel/rcu/tree.c:2763
>>> update_process_times+0x2d/0x70 kernel/time/timer.c:1636
>>> tick_sched_handle+0xa0/0x180 kernel/time/tick-sched.c:171
>>> tick_sched_timer+0x42/0x130 kernel/time/tick-sched.c:1179
>>> __run_hrtimer kernel/time/hrtimer.c:1337 [inline]
>>> __hrtimer_run_queues+0x3e3/0x10a0 kernel/time/hrtimer.c:1399
>>> hrtimer_interrupt+0x286/0x650 kernel/time/hrtimer.c:1457
>>> local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1025 [inline]
>>> smp_apic_timer_interrupt+0x15d/0x710 arch/x86/kernel/apic/apic.c:1050
>>> apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:862
>>> </IRQ>
>>> RIP: 0010:__sanitizer_cov_trace_pc+0x3f/0x50 kernel/kcov.c:106
>>> RSP: 0018:ffff8801920cf4d0 EFLAGS: 00000216 ORIG_RAX: ffffffffffffff13
>>> RAX: 0000000000040000 RBX: ffff8801ceb61200 RCX: ffffc90001eb0000
>>> RDX: 0000000000040000 RSI: ffffffff859d760f RDI: ffff8801ceb61200
>>> RBP: ffff8801920cf4d0 R08: ffff8801b4946540 R09: 0000000000000006
>>> R10: ffff8801b4946540 R11: 0000000000000000 R12: ffffffff8826fa20
>>> R13: 0000000000000020 R14: ffff8801d3008c00 R15: ffff8801ceb61200
>>> snd_pcm_stream_lock_irq+0xf/0xf0 sound/core/pcm_native.c:150
>>> __snd_pcm_lib_xfer+0x345/0x1d10 sound/core/pcm_lib.c:2162
>>> snd_pcm_oss_write3+0xe9/0x220 sound/core/oss/pcm_oss.c:1236
>>> io_playback_transfer+0x274/0x310 sound/core/oss/io.c:47
>>> snd_pcm_plug_write_transfer+0x36c/0x470 sound/core/oss/pcm_plugin.c:619
>>> snd_pcm_oss_write2+0x25c/0x460 sound/core/oss/pcm_oss.c:1365
>>> snd_pcm_oss_write1 sound/core/oss/pcm_oss.c:1431 [inline]
>>> snd_pcm_oss_write+0x55f/0xa20 sound/core/oss/pcm_oss.c:2774
>>> do_loop_readv_writev fs/read_write.c:703 [inline]
>>> do_iter_write+0x491/0x5f0 fs/read_write.c:961
>>> vfs_writev+0x1c7/0x330 fs/read_write.c:1004
>>> do_writev+0x112/0x2f0 fs/read_write.c:1039
>>> SYSC_writev fs/read_write.c:1112 [inline]
>>> SyS_writev+0x27/0x30 fs/read_write.c:1109
>>> do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287
>>> entry_SYSCALL_64_after_hwframe+0x42/0xb7
>>> RIP: 0033:0x4552d9
>>> RSP: 002b:00007f82ef52cc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
>>> RAX: ffffffffffffffda RBX: 00007f82ef52d6d4 RCX: 00000000004552d9
>>> RDX: 0000000000000001 RSI: 0000000020000180 RDI: 0000000000000015
>>> RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
>>> R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
>>> R13: 00000000000006cc R14: 00000000006fd3c0 R15: 0000000000000000
>>> ---
>>> This bug is generated by a dumb bot. It may contain errors.
>>> See https://goo.gl/tpsmEJ for details.
>>> Direct all questions to syzkaller@googlegroups.com.
>>> syzbot will keep track of this bug report.
>>> If you forgot to add the Reported-by tag, once the fix for this bug is
>>> merged
>>> into any tree, please reply to this email with:
>>> #syz fix: exact-commit-title
>>> To mark this as a duplicate of another syzbot report, please reply with:
>>> #syz dup: exact-subject-of-another-report
>>> If it's a one-off invalid bug report, please reply with:
>>> #syz invalid
>>> Note: if the crash happens again, it will cause creation of a new bug
>>> report.
>>> Note: all commands must start from beginning of the line in the email
>>> body.
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2018-04-07 11:58 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-04-06 13:24 INFO: rcu detected stall in snd_pcm_stream_lock_irq syzbot
2018-04-06 13:32 ` Dmitry Vyukov
2018-04-06 13:32 ` Dmitry Vyukov
2018-04-07 11:57 ` Dmitry Vyukov
2018-04-07 11:58 ` syzbot
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