[alsa-devel] INFO: rcu detected stall in __snd_pcm_lib_xfer (2)
Hello,
syzbot hit the following crash on upstream commit e02d37bf55a9a36f22427fd6dd733fe104d817b6 (Thu Apr 5 17:42:07 2018 +0000) Merge tag 'sound-4.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound syzbot dashboard link: https://syzkaller.appspot.com/bug?extid=7e3f31a52646f939c052
So far this crash happened 43 times on upstream. Unfortunately, I don't have any reproducer for this crash yet. Raw console output: https://syzkaller.appspot.com/x/log.txt?id=5148264345108480 Kernel config: https://syzkaller.appspot.com/x/.config?id=-4805825610197092128 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+7e3f31a52646f939c052@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.
INFO: rcu_sched self-detected stall on CPU 1-...!: (124999 ticks this GP) idle=522/1/4611686018427387906 softirq=65432/65432 fqs=169 (t=125000 jiffies g=35384 c=35383 q=537) rcu_sched kthread starved for 124294 jiffies! g35384 c35383 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0 RCU grace-period kthread stack dump: rcu_sched R running task 23768 9 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2848 [inline] __schedule+0x807/0x1e40 kernel/sched/core.c:3490 schedule+0xef/0x430 kernel/sched/core.c:3549 schedule_timeout+0x138/0x240 kernel/time/timer.c:1801 rcu_gp_kthread+0x6b5/0x1940 kernel/rcu/tree.c:2231 kthread+0x345/0x410 kernel/kthread.c:238 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:411 NMI backtrace for cpu 1 CPU: 1 PID: 15299 Comm: syz-executor3 Not tainted 4.16.0+ #2 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: <IRQ> __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b9/0x29f lib/dump_stack.c:53 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:arch_local_irq_enable arch/x86/include/asm/paravirt.h:793 [inline] RIP: 0010:snd_pcm_stream_unlock_irq+0xb7/0xf0 sound/core/pcm_native.c:166 RSP: 0018:ffff8801c3f27560 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc900038d5000 RDX: 0000000000040000 RSI: ffffffff859ca760 RDI: ffffffff88b172b8 RBP: ffff8801c3f27568 R08: ffff8801abf86af8 R09: 0000000000000006 R10: ffff8801abf86280 R11: 0000000000000000 R12: 0000000000000004 R13: 00000000ffffffe0 R14: ffff8801d7d9e1c0 R15: ffff8801ceac6940 __snd_pcm_lib_xfer+0x739/0x1d10 sound/core/pcm_lib.c:2246 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:1415 [inline] snd_pcm_oss_write+0x764/0xa20 sound/core/oss/pcm_oss.c:2774 __vfs_write+0x10b/0x880 fs/read_write.c:485 vfs_write+0x1f8/0x560 fs/read_write.c:549 ksys_write+0xf9/0x250 fs/read_write.c:598 SYSC_write fs/read_write.c:610 [inline] SyS_write+0x24/0x30 fs/read_write.c:607 do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4552d9 RSP: 002b:00007f1568de6c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f1568de76d4 RCX: 00000000004552d9 RDX: 0000000000000060 RSI: 0000000020000000 RDI: 0000000000000013 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000006c0 R14: 00000000006fd2a0 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.
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On Fri, 06 Apr 2018 09:08:01 +0200, syzbot wrote:
Hello,
syzbot hit the following crash on upstream commit e02d37bf55a9a36f22427fd6dd733fe104d817b6 (Thu Apr 5 17:42:07 2018 +0000) Merge tag 'sound-4.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound syzbot dashboard link: https://syzkaller.appspot.com/bug?extid=7e3f31a52646f939c052
So far this crash happened 43 times on upstream. Unfortunately, I don't have any reproducer for this crash yet. Raw console output: https://syzkaller.appspot.com/x/log.txt?id=5148264345108480 Kernel config: https://syzkaller.appspot.com/x/.config?id=-4805825610197092128 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+7e3f31a52646f939c052@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.
INFO: rcu_sched self-detected stall on CPU 1-...!: (124999 ticks this GP) idle=522/1/4611686018427387906 softirq=65432/65432 fqs=169 (t=125000 jiffies g=35384 c=35383 q=537) rcu_sched kthread starved for 124294 jiffies! g35384 c35383 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0 RCU grace-period kthread stack dump: rcu_sched R running task 23768 9 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2848 [inline] __schedule+0x807/0x1e40 kernel/sched/core.c:3490 schedule+0xef/0x430 kernel/sched/core.c:3549 schedule_timeout+0x138/0x240 kernel/time/timer.c:1801 rcu_gp_kthread+0x6b5/0x1940 kernel/rcu/tree.c:2231 kthread+0x345/0x410 kernel/kthread.c:238 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:411 NMI backtrace for cpu 1 CPU: 1 PID: 15299 Comm: syz-executor3 Not tainted 4.16.0+ #2 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace:
<IRQ> __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b9/0x29f lib/dump_stack.c:53 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:arch_local_irq_enable arch/x86/include/asm/paravirt.h:793 [inline] RIP: 0010:snd_pcm_stream_unlock_irq+0xb7/0xf0 sound/core/pcm_native.c:166 RSP: 0018:ffff8801c3f27560 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc900038d5000 RDX: 0000000000040000 RSI: ffffffff859ca760 RDI: ffffffff88b172b8 RBP: ffff8801c3f27568 R08: ffff8801abf86af8 R09: 0000000000000006 R10: ffff8801abf86280 R11: 0000000000000000 R12: 0000000000000004 R13: 00000000ffffffe0 R14: ffff8801d7d9e1c0 R15: ffff8801ceac6940 __snd_pcm_lib_xfer+0x739/0x1d10 sound/core/pcm_lib.c:2246 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:1415 [inline] snd_pcm_oss_write+0x764/0xa20 sound/core/oss/pcm_oss.c:2774 __vfs_write+0x10b/0x880 fs/read_write.c:485 vfs_write+0x1f8/0x560 fs/read_write.c:549 ksys_write+0xf9/0x250 fs/read_write.c:598 SYSC_write fs/read_write.c:610 [inline] SyS_write+0x24/0x30 fs/read_write.c:607 do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4552d9 RSP: 002b:00007f1568de6c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f1568de76d4 RCX: 00000000004552d9 RDX: 0000000000000060 RSI: 0000000020000000 RDI: 0000000000000013 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000006c0 R14: 00000000006fd2a0 R15: 0000000000000000
Hmm, a problem that appears like the issue we've already fixed strikes back. Maybe because of the recent my code change for further hardening of PCM OSS.
If there is a reproducer, I'd take a deeper look, but currently I couldn't see the obvious cause, and all reproducers in the past seem working. So if you get any reproducer, please let me know.
There are a couple of pending small fixes that might cure this, and I'm going to submit & merge before 4.17-rc1, in anyway.
thanks,
Takashi
On Fri, Apr 6, 2018 at 2:52 PM, Takashi Iwai tiwai@suse.de wrote:
On Fri, 06 Apr 2018 09:08:01 +0200, syzbot wrote:
Hello,
syzbot hit the following crash on upstream commit e02d37bf55a9a36f22427fd6dd733fe104d817b6 (Thu Apr 5 17:42:07 2018 +0000) Merge tag 'sound-4.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound syzbot dashboard link: https://syzkaller.appspot.com/bug?extid=7e3f31a52646f939c052
So far this crash happened 43 times on upstream. Unfortunately, I don't have any reproducer for this crash yet. Raw console output: https://syzkaller.appspot.com/x/log.txt?id=5148264345108480 Kernel config: https://syzkaller.appspot.com/x/.config?id=-4805825610197092128 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+7e3f31a52646f939c052@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.
INFO: rcu_sched self-detected stall on CPU 1-...!: (124999 ticks this GP) idle=522/1/4611686018427387906 softirq=65432/65432 fqs=169 (t=125000 jiffies g=35384 c=35383 q=537) rcu_sched kthread starved for 124294 jiffies! g35384 c35383 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0 RCU grace-period kthread stack dump: rcu_sched R running task 23768 9 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2848 [inline] __schedule+0x807/0x1e40 kernel/sched/core.c:3490 schedule+0xef/0x430 kernel/sched/core.c:3549 schedule_timeout+0x138/0x240 kernel/time/timer.c:1801 rcu_gp_kthread+0x6b5/0x1940 kernel/rcu/tree.c:2231 kthread+0x345/0x410 kernel/kthread.c:238 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:411 NMI backtrace for cpu 1 CPU: 1 PID: 15299 Comm: syz-executor3 Not tainted 4.16.0+ #2 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace:
<IRQ> __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b9/0x29f lib/dump_stack.c:53 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:arch_local_irq_enable arch/x86/include/asm/paravirt.h:793 [inline] RIP: 0010:snd_pcm_stream_unlock_irq+0xb7/0xf0 sound/core/pcm_native.c:166 RSP: 0018:ffff8801c3f27560 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc900038d5000 RDX: 0000000000040000 RSI: ffffffff859ca760 RDI: ffffffff88b172b8 RBP: ffff8801c3f27568 R08: ffff8801abf86af8 R09: 0000000000000006 R10: ffff8801abf86280 R11: 0000000000000000 R12: 0000000000000004 R13: 00000000ffffffe0 R14: ffff8801d7d9e1c0 R15: ffff8801ceac6940 __snd_pcm_lib_xfer+0x739/0x1d10 sound/core/pcm_lib.c:2246 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:1415 [inline] snd_pcm_oss_write+0x764/0xa20 sound/core/oss/pcm_oss.c:2774 __vfs_write+0x10b/0x880 fs/read_write.c:485 vfs_write+0x1f8/0x560 fs/read_write.c:549 ksys_write+0xf9/0x250 fs/read_write.c:598 SYSC_write fs/read_write.c:610 [inline] SyS_write+0x24/0x30 fs/read_write.c:607 do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4552d9 RSP: 002b:00007f1568de6c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f1568de76d4 RCX: 00000000004552d9 RDX: 0000000000000060 RSI: 0000000020000000 RDI: 0000000000000013 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000006c0 R14: 00000000006fd2a0 R15: 0000000000000000
Hmm, a problem that appears like the issue we've already fixed strikes back. Maybe because of the recent my code change for further hardening of PCM OSS.
If there is a reproducer, I'd take a deeper look, but currently I couldn't see the obvious cause, and all reproducers in the past seem working. So if you get any reproducer, please let me know.
There are a couple of pending small fixes that might cure this, and I'm going to submit & merge before 4.17-rc1, in anyway.
Hi Takashi,
syzbot will notify when/if a reproducer is available.
It happens pretty actively, so if it is cured by any commits, we will see it stop happening here: https://syzkaller.appspot.com/bug?extid=7e3f31a52646f939c052
There is also a bunch of similarly looking rcu stalls (also in sound and started happening all at once): https://syzkaller.appspot.com/bug?id=f087e17667da6944617675babc90277bc5a7b34... https://syzkaller.appspot.com/bug?id=55381513d03b0098c2905ae1a48b4cc7c3b25a2... https://syzkaller.appspot.com/bug?id=f9364472bcbd3cb1738f774dd3711668cb40221...
With high probability it is something that was just merged upstream.
syzbot has found reproducer for the following crash on upstream commit fd40ffc72e2f74c7db61e400903e7d50a88bc0b0 (Mon Apr 9 18:36:05 2018 +0000) selinux: fix missing dput() before selinuxfs unmount syzbot dashboard link: https://syzkaller.appspot.com/bug?extid=7e3f31a52646f939c052
So far this crash happened 731 times on upstream. C reproducer: https://syzkaller.appspot.com/x/repro.c?id=5746654556717056 syzkaller reproducer: https://syzkaller.appspot.com/x/repro.syz?id=5437811310198784 Raw console output: https://syzkaller.appspot.com/x/log.txt?id=5066563195502592 Kernel config: https://syzkaller.appspot.com/x/.config?id=-771321277174894814 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+7e3f31a52646f939c052@syzkaller.appspotmail.com It will help syzbot understand when the bug is fixed.
INFO: rcu_sched self-detected stall on CPU 0-....: (124999 ticks this GP) idle=1f2/1/4611686018427387906 softirq=10492/10492 fqs=31246 (t=125000 jiffies g=4909 c=4908 q=3) NMI backtrace for cpu 0 CPU: 0 PID: 4481 Comm: syzkaller419220 Not tainted 4.16.0+ #14 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:arch_local_irq_enable arch/x86/include/asm/paravirt.h:793 [inline] RIP: 0010:snd_pcm_stream_unlock_irq+0xb7/0xf0 sound/core/pcm_native.c:166 RSP: 0018:ffff8801ac8a6b60 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff8801a89e2700 RBX: 0000000000000000 RCX: 1ffff1003513c5f3 RDX: 0000000000000000 RSI: ffffffff85a14e10 RDI: ffffffff88b17bf8 RBP: ffff8801ac8a6b68 R08: ffff8801a89e2f78 R09: 0000000000000006 R10: ffff8801a89e2700 R11: 0000000000000000 R12: 0000000000000004 R13: 00000000ffffffe0 R14: ffff8801d9a6ac00 R15: ffff8801ceb2f200 __snd_pcm_lib_xfer+0x739/0x1d10 sound/core/pcm_lib.c:2246 snd_pcm_oss_write3+0xe9/0x220 sound/core/oss/pcm_oss.c:1236 snd_pcm_oss_write2+0x34c/0x460 sound/core/oss/pcm_oss.c:1373 snd_pcm_oss_sync1+0x332/0x5a0 sound/core/oss/pcm_oss.c:1606 snd_pcm_oss_sync.isra.29+0x790/0x980 sound/core/oss/pcm_oss.c:1682 snd_pcm_oss_release+0x214/0x290 sound/core/oss/pcm_oss.c:2559 __fput+0x34d/0x890 fs/file_table.c:209 ____fput+0x15/0x20 fs/file_table.c:243 task_work_run+0x1e4/0x290 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x1aee/0x2730 kernel/exit.c:865 do_group_exit+0x16f/0x430 kernel/exit.c:968 get_signal+0x886/0x1960 kernel/signal.c:2469 do_signal+0x98/0x2040 arch/x86/kernel/signal.c:810 exit_to_usermode_loop+0x28a/0x310 arch/x86/entry/common.c:162 prepare_exit_to_usermode arch/x86/entry/common.c:196 [inline] syscall_return_slowpath arch/x86/entry/common.c:265 [inline] do_syscall_64+0x792/0x9d0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x449eb9 RSP: 002b:00007f302d286da8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00000000006dcc5c RCX: 0000000000449eb9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000006dcc5c RBP: 00000000006dcc58 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0100000000000000 R13: 7073642f7665642f R14: 646e732f7665642f R15: 0000000000000009
participants (3)
-
Dmitry Vyukov -
syzbot -
Takashi Iwai