syzbot

 sign-in | mailing list | source | docs
🐞 Open [980] ≡ Subsystems 🐞 Fixed [5216] 🐞 Invalid [12473] ⬇ Missing Backports [82] 📈 Kernel Health 📈 Bug Lifetimes 📈 Fuzzing 📈 Crashes 💬 Send us feedback

INFO: rcu detected stall in snd_pcm_oss_write3 (2)

Status: closed as dup on 2018/04/07 11:59
Subsystems: sound
[Documentation on labels]
Reported-by: syzbot+150189c103427d31a053@syzkaller.appspotmail.com
Fix commit: e15dc99dbb9c ALSA: pcm: Fix endless loop for XRUN recovery in OSS emulation
First crash: 2205d, last: 2200d
▶ ▼ Duplicate of
Title Repro Cause bisect Fix bisect Count Last Reported
INFO: rcu detected stall in io_playback_transfer sound 9 2199d 2204d
▶ ▼ Discussions (7)
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_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_oss_write3 sound 1 2293d 2292d 0/26 closed as invalid on 2018/02/14 13:49

Sample crash report:
IPVS: ftp: loaded support on port[0] = 21
INFO: rcu_sched self-detected stall on CPU
	1-....: (124999 ticks this GP) idle=622/1/4611686018427387906 softirq=10596/10596 fqs=31239 
	 (t=125000 jiffies g=4952 c=4951 q=20)
NMI backtrace for cpu 1
CPU: 1 PID: 4474 Comm: syzkaller631460 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:__snd_pcm_lib_xfer+0x768/0x1d10 sound/core/pcm_lib.c:2111
RSP: 0018:ffff8801b7b76ea8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000000 RBX: ffffffffffffffe0 RCX: ffffed0036f6edec
RDX: 0000000000000000 RSI: ffffffff859ff04e RDI: ffffed0036f6edf0
RBP: ffff8801b7b77148 R08: ffff8801afeae9b8 R09: 0000000000000006
R10: ffff8801afeae140 R11: 0000000000000000 R12: 0000000000000004
R13: 00000000ffffffe0 R14: ffff8801af2165c0 R15: ffff8801ceaec000
 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_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
 SYSC_exit_group kernel/exit.c:979 [inline]
 SyS_exit_group+0x1d/0x20 kernel/exit.c:977
 do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x4446e9
RSP: 002b:00007ffe29466408 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 00000000004446e9
RDX: 00000000004446e9 RSI: 0000000000000080 RDI: 0000000000000001
RBP: 00000000006cf018 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000401ff0
R13: 0000000000402080 R14: 0000000000000000 R15: 0000000000000000

Crashes (117):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/04/06 21:13 upstream 38c23685b273 4f1152d4 .config console log report syz C ci-upstream-kasan-gce
2018/04/11 05:35 upstream c18bb396d3d2 8b8de427 .config console log report ci-upstream-kasan-gce-root
2018/04/11 02:27 upstream c18bb396d3d2 8b8de427 .config console log report ci-upstream-kasan-gce-root
2018/04/11 01:18 upstream c18bb396d3d2 8b8de427 .config console log report ci-upstream-kasan-gce-root
2018/04/10 22:58 upstream c18bb396d3d2 8b8de427 .config console log report ci-upstream-kasan-gce-root
2018/04/10 17:35 upstream c18bb396d3d2 8e873e9d .config console log report ci-upstream-kasan-gce
2018/04/10 14:42 upstream c18bb396d3d2 8e873e9d .config console log report ci-upstream-kasan-gce
2018/04/10 12:43 upstream c18bb396d3d2 8e873e9d .config console log report ci-upstream-kasan-gce-root
2018/04/10 10:48 upstream c18bb396d3d2 b9f65507 .config console log report ci-upstream-kasan-gce
2018/04/10 07:52 upstream fd40ffc72e2f b9f65507 .config console log report ci-upstream-kasan-gce-root
2018/04/10 06:33 upstream fd40ffc72e2f b9f65507 .config console log report ci-upstream-kasan-gce
2018/04/10 03:11 upstream fd40ffc72e2f b9f65507 .config console log report ci-upstream-kasan-gce
2018/04/10 02:08 upstream fd40ffc72e2f b9f65507 .config console log report ci-upstream-kasan-gce
2018/04/10 00:18 upstream fd40ffc72e2f b9f65507 .config console log report ci-upstream-kasan-gce
2018/04/09 20:50 upstream fd40ffc72e2f b9f65507 .config console log report ci-upstream-kasan-gce-root
2018/04/09 19:07 upstream 3fd14cdcc05a f13fb445 .config console log report ci-upstream-kasan-gce-root
2018/04/09 14:31 upstream 3fd14cdcc05a f13fb445 .config console log report ci-upstream-kasan-gce
2018/04/09 10:35 upstream 3fd14cdcc05a f13fb445 .config console log report ci-upstream-kasan-gce-root
2018/04/09 06:29 upstream 3fd14cdcc05a 77bd5117 .config console log report ci-upstream-kasan-gce
2018/04/09 05:28 upstream 3fd14cdcc05a 77bd5117 .config console log report ci-upstream-kasan-gce
2018/04/08 22:51 upstream 3fd14cdcc05a 77bd5117 .config console log report ci-upstream-kasan-gce-root
2018/04/08 21:18 upstream 3fd14cdcc05a 77bd5117 .config console log report ci-upstream-kasan-gce-root
2018/04/08 19:36 upstream 3fd14cdcc05a 77bd5117 .config console log report ci-upstream-kasan-gce
2018/04/08 17:40 upstream 3fd14cdcc05a 77bd5117 .config console log report ci-upstream-kasan-gce
2018/04/08 16:00 upstream 3fd14cdcc05a 77bd5117 .config console log report ci-upstream-kasan-gce
2018/04/08 14:34 upstream 3fd14cdcc05a 77bd5117 .config console log report ci-upstream-kasan-gce
2018/04/08 11:29 upstream 3fd14cdcc05a 66f22a7f .config console log report ci-upstream-kasan-gce
2018/04/08 09:03 upstream 3fd14cdcc05a 66f22a7f .config console log report ci-upstream-kasan-gce
2018/04/08 07:39 upstream 3fd14cdcc05a 66f22a7f .config console log report ci-upstream-kasan-gce
2018/04/08 05:35 upstream 3fd14cdcc05a 66f22a7f .config console log report ci-upstream-kasan-gce
2018/04/08 03:16 upstream 3fd14cdcc05a 66f22a7f .config console log report ci-upstream-kasan-gce
2018/04/08 02:19 upstream 3fd14cdcc05a 66f22a7f .config console log report ci-upstream-kasan-gce
2018/04/08 01:26 upstream 3fd14cdcc05a 66f22a7f .config console log report ci-upstream-kasan-gce-root
2018/04/08 00:48 upstream 3fd14cdcc05a 66f22a7f .config console log report ci-upstream-kasan-gce-root
2018/04/07 23:58 upstream 3fd14cdcc05a 66f22a7f .config console log report ci-upstream-kasan-gce
2018/04/07 23:06 upstream 3fd14cdcc05a 66f22a7f .config console log report ci-upstream-kasan-gce
2018/04/07 22:55 upstream 3fd14cdcc05a 66f22a7f .config console log report ci-upstream-kasan-gce
2018/04/07 22:38 upstream 3fd14cdcc05a 66f22a7f .config console log report ci-upstream-kasan-gce
2018/04/07 22:09 upstream 3fd14cdcc05a 66f22a7f .config console log report ci-upstream-kasan-gce-root
2018/04/07 21:43 upstream 3fd14cdcc05a 66f22a7f .config console log report ci-upstream-kasan-gce
2018/04/07 21:26 upstream 3fd14cdcc05a 66f22a7f .config console log report ci-upstream-kasan-gce-root
2018/04/07 20:51 upstream 3fd14cdcc05a 66f22a7f .config console log report ci-upstream-kasan-gce
2018/04/07 19:27 upstream 3fd14cdcc05a 66f22a7f .config console log report ci-upstream-kasan-gce-root
2018/04/07 18:46 upstream 3fd14cdcc05a 66f22a7f .config console log report ci-upstream-kasan-gce-root
2018/04/07 18:19 upstream 3fd14cdcc05a 66f22a7f .config console log report ci-upstream-kasan-gce-root
2018/04/05 19:47 upstream e02d37bf55a9 5e1ccffc .config console log report ci-upstream-kasan-gce
* Struck through repros no longer work on HEAD.