syzbot


INFO: rcu detected stall in snd_pcm_stream_lock_irq

Status: closed as dup on 2018/04/07 11:58
Subsystems: sound
[Documentation on labels]
Reported-by: syzbot+74e011b2046f4322d178@syzkaller.appspotmail.com
First crash: 2452d, last: 2447d
Duplicate of
Title Repro Cause bisect Fix bisect Count Last Reported
INFO: rcu detected stall in io_playback_transfer sound 9 2447d 2452d
Discussions (1)
Title Replies (including bot) Last reply
INFO: rcu detected stall in snd_pcm_stream_lock_irq 1 (2) 2018/04/06 13:32

Sample crash report:
bond0: The slave device specified does not support setting the MAC address
bond0: The slave device specified does not support setting the MAC address
INFO: rcu_sched self-detected stall on CPU
	0-....: (124999 ticks this GP) idle=97a/1/4611686018427387906 softirq=34046/34046 fqs=31213 
	 (t=125000 jiffies g=18514 c=18513 q=264)
NMI backtrace for cpu 0
CPU: 0 PID: 10032 Comm: syz-executor4 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:check_kcov_mode kernel/kcov.c:67 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x20/0x50 kernel/kcov.c:101
RSP: 0018:ffff8801b264ea20 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: ffff8801ab71a700 RBX: ffff8801ceb5ed80 RCX: ffffffff85a1eb7b
RDX: 0000000000000000 RSI: ffffffff85a1eb97 RDI: 0000000000000001
RBP: ffff8801b264ea20 R08: ffff8801ab71a700 R09: 0000000000000006
R10: ffff8801ab71a700 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000001000 R14: ffff8801acab4ac0 R15: ffff8801ceb5ed80
 arch_local_irq_disable arch/x86/include/asm/paravirt.h:788 [inline]
 snd_pcm_stream_lock_irq+0x87/0xf0 sound/core/pcm_native.c:151
 __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_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: 0033:0x455259
RSP: 002b:00007f80d426ece8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000072bf80 RCX: 0000000000455259
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000072bf80
RBP: 000000000072bf80 R08: 0000000000000000 R09: 000000000072bf58
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdabd1b9af R14: 00007f80d426f9c0 R15: 0000000000000001

Crashes (10):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/04/11 04:31 upstream c18bb396d3d2 8b8de427 .config console log report ci-upstream-kasan-gce-root
2018/04/10 16:08 upstream c18bb396d3d2 8e873e9d .config console log report ci-upstream-kasan-gce-root
2018/04/10 09:42 upstream c18bb396d3d2 b9f65507 .config console log report ci-upstream-kasan-gce
2018/04/10 05:38 upstream fd40ffc72e2f b9f65507 .config console log report ci-upstream-kasan-gce
2018/04/09 22:37 upstream fd40ffc72e2f b9f65507 .config console log report ci-upstream-kasan-gce-root
2018/04/09 13:46 upstream 3fd14cdcc05a f13fb445 .config console log report ci-upstream-kasan-gce
2018/04/09 02:47 upstream 3fd14cdcc05a 77bd5117 .config console log report ci-upstream-kasan-gce
2018/04/08 17:31 upstream 3fd14cdcc05a 77bd5117 .config console log report ci-upstream-kasan-gce-root
2018/04/06 20:50 upstream 38c23685b273 4f1152d4 .config console log report ci-upstream-kasan-gce-root
2018/04/06 11:27 upstream 38c23685b273 4f1152d4 .config console log report ci-upstream-kasan-gce
* Struck through repros no longer work on HEAD.