Re: INFO: rcu detected stall in snd_pcm_oss_write2
#syz dup: INFO: rcu detected stall in io_playback_transfer On Fri, Apr 6, 2018 at 2:04 PM, syzbot wrote: > Hello, > > syzbot hit the following crash on upstream commit > e02d37bf55a9a36f22427fd6dd733fe104d817b6 (Thu Apr 5 17:42:07 2018 +) > 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=adc909755650e074e501 > > So far this crash happened 2 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=4567980574769152 > 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+adc909755650e074e...@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. > > reason=8021 qualification= > IDTVectoring: info= errcode= > TSC Offset = 0xfd92e6bf78df > TPR Threshold = 0x00 > EPT pointer = 0x0001ab93b01e > INFO: rcu_sched self-detected stall on CPU > 0-: (124999 ticks this GP) idle=81a/1/4611686018427387906 > softirq=379270/379270 fqs=31240 > (t=125000 jiffies g=195733 c=195732 q=734) > NMI backtrace for cpu 0 > CPU: 0 PID: 9961 Comm: syz-executor2 Not tainted 4.16.0+ #2 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > Call Trace: > > __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 > > RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x0/0x20 kernel/kcov.c:183 > RSP: 0018:88018e3fee20 EFLAGS: 0246 ORIG_RAX: ff13 > RAX: RBX: RCX: 85a132bd > RDX: RSI: RDI: > RBP: 88018e3fee70 R08: 88018e044100 R09: 0006 > R10: 88018e044100 R11: R12: 0001 > R13: 8801ceaa2d80 R14: 88019269ab00 R15: ffe0 > 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+0x90/0x2020 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: 0033:0x4552d9 > RSP: 002b:7f0bfca8cce8 EFLAGS: 0246 ORIG_RAX: 00ca > RAX: fe00 RBX: 0072bf80 RCX: 004552d9 > RDX: RSI: RDI: 0072bf80 > RBP: 0072bf80 R08: R09: 0072bf58 > R10: R11: 0246 R12: > R13: 00a3e81f R14: 7f0bfca8d9c0 R15: 0001 > > > --- > This bug is generated by a dumb bot. It may contain errors. > See https://goo.gl/tpsmEJ for details. > Direct all questions to syzkal...@googlegroups.com. > > syzbot will keep track of this bug report
INFO: rcu detected stall in snd_pcm_oss_write2
Hello, syzbot hit the following crash on upstream commit e02d37bf55a9a36f22427fd6dd733fe104d817b6 (Thu Apr 5 17:42:07 2018 +) 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=adc909755650e074e501 So far this crash happened 2 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=4567980574769152 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+adc909755650e074e...@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. reason=8021 qualification= IDTVectoring: info= errcode= TSC Offset = 0xfd92e6bf78df TPR Threshold = 0x00 EPT pointer = 0x0001ab93b01e INFO: rcu_sched self-detected stall on CPU 0-: (124999 ticks this GP) idle=81a/1/4611686018427387906 softirq=379270/379270 fqs=31240 (t=125000 jiffies g=195733 c=195732 q=734) NMI backtrace for cpu 0 CPU: 0 PID: 9961 Comm: syz-executor2 Not tainted 4.16.0+ #2 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __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 RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x0/0x20 kernel/kcov.c:183 RSP: 0018:88018e3fee20 EFLAGS: 0246 ORIG_RAX: ff13 RAX: RBX: RCX: 85a132bd RDX: RSI: RDI: RBP: 88018e3fee70 R08: 88018e044100 R09: 0006 R10: 88018e044100 R11: R12: 0001 R13: 8801ceaa2d80 R14: 88019269ab00 R15: ffe0 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+0x90/0x2020 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: 0033:0x4552d9 RSP: 002b:7f0bfca8cce8 EFLAGS: 0246 ORIG_RAX: 00ca RAX: fe00 RBX: 0072bf80 RCX: 004552d9 RDX: RSI: RDI: 0072bf80 RBP: 0072bf80 R08: R09: 0072bf58 R10: R11: 0246 R12: R13: 00a3e81f R14: 7f0bfca8d9c0 R15: 0001 --- This bug is generated by a dumb bot. It may contain errors. See https://goo.gl/tpsmEJ for details. Direct all questions to syzkal...@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
