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INFO: rcu detected stall in __snd_pcm_lib_xfer (2)

Status: fixed on 2018/05/08 18:30
Subsystems: sound
[Documentation on labels]
Reported-by: syzbot+7e3f31a52646f939c052@syzkaller.appspotmail.com
Fix commit: e15dc99dbb9c ALSA: pcm: Fix endless loop for XRUN recovery in OSS emulation
First crash: 2548d, last: 2543d
▶ ▼ Discussions (8)
Title Replies (including bot) Last reply
[PATCH 3.16 000/366] 3.16.60-rc1 review 370 (370) 2019/03/29 15:47
[PATCH 4.4 00/97] 4.4.129-stable review 111 (111) 2018/05/17 08:54
[PATCH 4.16 000/196] 4.16.4-stable review 213 (213) 2018/04/28 14:59
[PATCH 4.9 00/95] 4.9.96-stable review 120 (120) 2018/04/26 06:46
[PATCH 4.14 000/164] 4.14.36-stable review 172 (172) 2018/04/24 07:25
[PATCH 3.18 00/52] 3.18.106-stable review 61 (61) 2018/04/23 21:39
INFO: rcu detected stall in __snd_pcm_lib_xfer (2) 2 (4) 2018/04/10 01:39
INFO: rcu detected stall in snd_pcm_oss_write3 (2) 4 (6) 2018/04/07 11:58
▶ ▼ Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: rcu detected stall in __snd_pcm_lib_xfer sound 4 2639d 2643d 0/28 closed as invalid on 2018/02/14 15:02

Sample crash report:
random: crng init done
INFO: rcu_sched self-detected stall on CPU
	1-....: (124999 ticks this GP) idle=77e/1/4611686018427387906 softirq=11130/11130 fqs=31243 
	 (t=125000 jiffies g=5013 c=5012 q=3)
NMI backtrace for cpu 1
CPU: 1 PID: 4590 Comm: syzkaller664164 Not tainted 4.16.0+ #16
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:ffff8801bc2eeb60 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13
RAX: ffff8801b80f0140 RBX: 0000000000000000 RCX: 1ffff1003701e13b
RDX: 0000000000000000 RSI: ffffffff85a14e10 RDI: ffffffff88b17bf8
RBP: ffff8801bc2eeb68 R08: ffff8801b80f09b8 R09: 0000000000000006
R10: ffff8801b80f0140 R11: 0000000000000000 R12: 0000000000000004
R13: 00000000ffffffe0 R14: ffff8801b82e9240 R15: ffff8801ceb4f200
 __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: 0033:0x448029
RSP: 002b:00007f7284f83da8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00000000006e59fc RCX: 0000000000448029
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000006e59fc
RBP: 00000000006e59f8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0100000000000000
R13: 7073642f7665642f R14: ffffffffffff8e97 R15: 0000000000000004

Crashes (1064):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/04/10 08:48 upstream fd40ffc72e2f b9f65507 .config console log report syz C ci-upstream-kasan-gce
2018/04/10 01:38 upstream fd40ffc72e2f b9f65507 .config console log report syz C ci-upstream-kasan-gce-root
2018/04/10 20:18 upstream c18bb396d3d2 8b8de427 .config console log report ci-upstream-kasan-gce-root
2018/04/09 09:22 upstream 3fd14cdcc05a f13fb445 .config console log report ci-upstream-kasan-gce
2018/04/08 13:59 upstream 3fd14cdcc05a 77bd5117 .config console log report ci-upstream-kasan-gce-root
2018/04/07 15:51 upstream 3fd14cdcc05a 66f22a7f .config console log report ci-upstream-kasan-gce-root
2018/04/07 14:06 upstream 3fd14cdcc05a 66f22a7f .config console log report ci-upstream-kasan-gce
2018/04/07 12:42 upstream 3fd14cdcc05a 66f22a7f .config console log report ci-upstream-kasan-gce-root
2018/04/07 10:24 upstream 3fd14cdcc05a d613535f .config console log report ci-upstream-kasan-gce
2018/04/07 00:05 upstream 3fd14cdcc05a d613535f .config console log report ci-upstream-kasan-gce
2018/04/06 10:56 upstream 38c23685b273 4f1152d4 .config console log report ci-upstream-kasan-gce-root
2018/04/06 06:49 upstream 3c8ba0d61d04 a932eae6 .config console log report ci-upstream-kasan-gce-root
2018/04/06 06:35 upstream 3c8ba0d61d04 a932eae6 .config console log report ci-upstream-kasan-gce-root
2018/04/06 06:28 upstream 3c8ba0d61d04 a932eae6 .config console log report ci-upstream-kasan-gce-root
2018/04/06 06:26 upstream 3c8ba0d61d04 a932eae6 .config console log report ci-upstream-kasan-gce-root
2018/04/06 06:16 upstream e02d37bf55a9 a932eae6 .config console log report ci-upstream-kasan-gce
2018/04/06 05:16 upstream 3c8ba0d61d04 a932eae6 .config console log report ci-upstream-kasan-gce-root
2018/04/06 05:08 upstream e02d37bf55a9 a932eae6 .config console log report ci-upstream-kasan-gce
2018/04/06 04:57 upstream e02d37bf55a9 a932eae6 .config console log report ci-upstream-kasan-gce
2018/04/06 04:56 upstream e02d37bf55a9 a932eae6 .config console log report ci-upstream-kasan-gce
2018/04/06 04:52 upstream 3c8ba0d61d04 a932eae6 .config console log report ci-upstream-kasan-gce-root
2018/04/06 04:38 upstream e02d37bf55a9 a932eae6 .config console log report ci-upstream-kasan-gce
2018/04/06 04:28 upstream e02d37bf55a9 a932eae6 .config console log report ci-upstream-kasan-gce
2018/04/06 04:28 upstream 3c8ba0d61d04 a932eae6 .config console log report ci-upstream-kasan-gce-root
2018/04/06 03:58 upstream 3c8ba0d61d04 a932eae6 .config console log report ci-upstream-kasan-gce-root
2018/04/06 03:00 upstream e02d37bf55a9 a932eae6 .config console log report ci-upstream-kasan-gce
2018/04/06 03:00 upstream e02d37bf55a9 a932eae6 .config console log report ci-upstream-kasan-gce
2018/04/06 02:16 upstream e02d37bf55a9 a932eae6 .config console log report ci-upstream-kasan-gce
2018/04/06 01:36 upstream 3c8ba0d61d04 a932eae6 .config console log report ci-upstream-kasan-gce-root
2018/04/06 00:09 upstream e02d37bf55a9 a932eae6 .config console log report ci-upstream-kasan-gce
2018/04/06 00:05 upstream e02d37bf55a9 a932eae6 .config console log report ci-upstream-kasan-gce
2018/04/06 00:03 upstream 3c8ba0d61d04 a932eae6 .config console log report ci-upstream-kasan-gce-root
2018/04/05 23:56 upstream 3c8ba0d61d04 a932eae6 .config console log report ci-upstream-kasan-gce-root
2018/04/05 23:16 upstream 3c8ba0d61d04 a932eae6 .config console log report ci-upstream-kasan-gce-root
2018/04/05 22:51 upstream 3c8ba0d61d04 a932eae6 .config console log report ci-upstream-kasan-gce-root
2018/04/05 21:46 upstream e02d37bf55a9 a932eae6 .config console log report ci-upstream-kasan-gce
2018/04/05 21:37 upstream e02d37bf55a9 a932eae6 .config console log report ci-upstream-kasan-gce
2018/04/05 19:52 upstream e02d37bf55a9 5e1ccffc .config console log report ci-upstream-kasan-gce
2018/04/05 19:50 upstream e02d37bf55a9 5e1ccffc .config console log report ci-upstream-kasan-gce
2018/04/05 19:50 upstream e02d37bf55a9 5e1ccffc .config console log report ci-upstream-kasan-gce
2018/04/05 19:49 upstream e02d37bf55a9 5e1ccffc .config console log report ci-upstream-kasan-gce
2018/04/05 19:48 upstream e02d37bf55a9 5e1ccffc .config console log report ci-upstream-kasan-gce
2018/04/05 19:44 upstream e02d37bf55a9 5e1ccffc .config console log report ci-upstream-kasan-gce
2018/04/05 19:44 upstream e02d37bf55a9 5e1ccffc .config console log report ci-upstream-kasan-gce
2018/04/05 19:40 upstream e02d37bf55a9 5e1ccffc .config console log report ci-upstream-kasan-gce
2018/04/05 19:39 upstream e02d37bf55a9 5e1ccffc .config console log report ci-upstream-kasan-gce
2018/04/05 19:39 upstream e02d37bf55a9 5e1ccffc .config console log report ci-upstream-kasan-gce
2018/04/05 19:36 upstream e02d37bf55a9 5e1ccffc .config console log report ci-upstream-kasan-gce
2018/04/05 19:34 upstream e02d37bf55a9 5e1ccffc .config console log report ci-upstream-kasan-gce
2018/04/05 19:29 upstream e02d37bf55a9 5e1ccffc .config console log report ci-upstream-kasan-gce
2018/04/05 19:28 upstream e02d37bf55a9 5e1ccffc .config console log report ci-upstream-kasan-gce
* Struck through repros no longer work on HEAD.