INFO: rcu detected stall in sys

Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported
INFO: rcu detected stall in sys_kill cgroups mm				3	1782d	1818d

1782d

1818d

Title	Replies (including bot)	Last reply
INFO: rcu detected stall in sys_poll (2)	2 (3)	2020/01/08 22:07

Title

Replies (including bot)

Last reply

INFO: rcu detected stall in sys_poll (2)

2 (3)

2020/01/08 22:07

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	INFO: rcu detected stall in sys_poll (3) kernel				1	897d	897d	0/28	auto-closed as invalid on 2022/09/09 03:17
upstream	INFO: rcu detected stall in sys_poll kernel				21	1817d	1818d	0/28	closed as invalid on 2019/12/04 14:14

rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-...!: (10499 ticks this GP) idle=402/1/0x4000000000000002 softirq=13862/13862 fqs=7 (t=10500 jiffies g=6881 q=404) rcu: rcu_preempt kthread starved for 10484 jiffies! g6881 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 29032 10 2 0x80004000 Call Trace: context_switch kernel/sched/core.c:3385 [inline] __schedule+0x9a0/0xcc0 kernel/sched/core.c:4081 schedule+0x181/0x210 kernel/sched/core.c:4155 schedule_timeout+0x14f/0x240 kernel/time/timer.c:1895 rcu_gp_fqs_loop kernel/rcu/tree.c:1661 [inline] rcu_gp_kthread+0xed8/0x1770 kernel/rcu/tree.c:1821 kthread+0x332/0x350 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 NMI backtrace for cpu 1 CPU: 1 PID: 8611 Comm: udevd Not tainted 5.5.0-rc5-syzkaller #0 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+0x1fb/0x318 lib/dump_stack.c:118 nmi_cpu_backtrace+0xaf/0x1a0 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x174/0x290 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x10/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x15a/0x220 kernel/rcu/tree_stall.h:254 print_cpu_stall kernel/rcu/tree_stall.h:455 [inline] check_cpu_stall kernel/rcu/tree_stall.h:529 [inline] rcu_pending kernel/rcu/tree.c:2827 [inline] rcu_sched_clock_irq+0xe25/0x1ad0 kernel/rcu/tree.c:2271 update_process_times+0x12d/0x180 kernel/time/timer.c:1726 tick_sched_handle kernel/time/tick-sched.c:167 [inline] tick_sched_timer+0x263/0x420 kernel/time/tick-sched.c:1310 __run_hrtimer kernel/time/hrtimer.c:1517 [inline] __hrtimer_run_queues+0x403/0x840 kernel/time/hrtimer.c:1579 hrtimer_interrupt+0x38c/0xda0 kernel/time/hrtimer.c:1641 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline] smp_apic_timer_interrupt+0x109/0x280 arch/x86/kernel/apic/apic.c:1135 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 </IRQ> RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:35 [inline] RIP: 0010:memcg_kmem_enabled include/linux/memcontrol.h:1389 [inline] RIP: 0010:memcg_kmem_uncharge include/linux/memcontrol.h:1401 [inline] RIP: 0010:free_thread_stack+0x11f/0x590 kernel/fork.c:284 Code: 3e e8 45 73 ee ff 48 c1 e8 06 48 83 e0 c0 48 bf 00 00 00 00 00 ea ff ff 48 01 c7 be 03 00 00 00 e8 86 91 61 00 e9 5d 04 00 00 <e8> 3c 2c 2e 00 48 89 df 31 f6 e8 02 8d 6f 00 43 80 3c 2e 00 74 08 RSP: 0018:ffffc90001c57760 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 1ffff11011ca35e1 RBX: ffffea0002a04b40 RCX: ffff8880a9184080 RDX: 0000000000000000 RSI: 00000000fffffffc RDI: ffffea0002a04b40 RBP: ffffc90001c57798 R08: 000000000003a728 R09: ffffed101357e2a1 R10: ffffed101357e2a1 R11: 0000000000000000 R12: ffff88808e51afa0 R13: dffffc0000000000 R14: 1ffff11011ca35f4 R15: ffff88809abf14f8 release_task_stack kernel/fork.c:440 [inline] put_task_stack+0xa3/0x130 kernel/fork.c:451 finish_task_switch+0x3f1/0x550 kernel/sched/core.c:3256 context_switch kernel/sched/core.c:3388 [inline] __schedule+0x9a8/0xcc0 kernel/sched/core.c:4081 schedule+0x181/0x210 kernel/sched/core.c:4155 schedule_hrtimeout_range_clock+0x3c7/0x510 kernel/time/hrtimer.c:2130 schedule_hrtimeout_range+0x2a/0x40 kernel/time/hrtimer.c:2175 poll_schedule_timeout+0x11c/0x1c0 fs/select.c:243 do_poll fs/select.c:951 [inline] do_sys_poll+0x83f/0x1250 fs/select.c:1001 __do_sys_poll fs/select.c:1059 [inline] __se_sys_poll+0x1b0/0x360 fs/select.c:1047 __x64_sys_poll+0x7b/0x90 fs/select.c:1047 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f8d5784d678 Code: 11 48 83 c8 ff eb ea 90 90 90 90 90 90 90 90 90 90 90 48 83 ec 28 8b 05 82 8f 2b 00 85 c0 75 17 48 63 d2 b8 07 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 48 83 c4 28 c3 89 54 24 08 48 89 74 24 10 RSP: 002b:00007fff06690ac0 EFLAGS: 00000246 ORIG_RAX: 0000000000000007 RAX: ffffffffffffffda RBX: 20c49ba5e353f7cf RCX: 00007f8d5784d678 RDX: 000000000000ee2d RSI: 0000000000000001 RDI: 00007fff06690b80 RBP: 0000000000000000 R08: 00007fff06690ad0 R09: 00007fff0672c0b8 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000001aa1240 R13: 00000000000021d3 R14: 00007fff06690b54 R15: 0000000001a90250

Time	Kernel	Commit	Syzkaller	Config	Log	Report	Manager
2020/01/08 09:07	upstream	ae6088216ce4	6738e0b3	.config	console log	report	ci-upstream-kasan-gce-smack-root
2020/01/08 08:28	upstream	ae6088216ce4	6738e0b3	.config	console log	report	ci-upstream-kasan-gce-smack-root
2020/01/08 08:18	upstream	ae6088216ce4	6738e0b3	.config	console log	report	ci-upstream-kasan-gce-smack-root
2020/01/08 07:03	upstream	ae6088216ce4	6738e0b3	.config	console log	report	ci-upstream-kasan-gce-smack-root
2020/01/08 04:26	upstream	ae6088216ce4	6738e0b3	.config	console log	report	ci-upstream-kasan-gce-smack-root
2020/01/08 04:06	upstream	ae6088216ce4	6738e0b3	.config	console log	report	ci-upstream-kasan-gce-smack-root
2020/01/08 03:25	upstream	ae6088216ce4	6738e0b3	.config	console log	report	ci-upstream-kasan-gce-smack-root
2020/01/08 01:33	upstream	ae6088216ce4	6738e0b3	.config	console log	report	ci-upstream-kasan-gce-smack-root
2020/01/08 01:18	upstream	ae6088216ce4	6738e0b3	.config	console log	report	ci-upstream-kasan-gce-smack-root