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INFO: rcu detected stall in schedule_tail (3)

Status: closed as invalid on 2020/01/09 08:13
Subsystems: cgroups mm
[Documentation on labels]
First crash: 1569d, last: 1569d
▶ ▼ Similar bugs (4)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: rcu detected stall in schedule_tail (4) arm 2 324d 401d 0/26 auto-obsoleted due to no activity on 2023/09/05 02:08
upstream INFO: rcu detected stall in schedule_tail kernel 145 1604d 1606d 0/26 closed as invalid on 2019/12/04 14:14
upstream INFO: rcu detected stall in schedule_tail (5) mm 2 195d 197d 0/26 auto-obsoleted due to no activity on 2024/01/11 06:31
upstream INFO: rcu detected stall in schedule_tail (2) kernel 26 1569d 1570d 0/26 closed as invalid on 2020/01/08 05:23

Sample crash report:
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 1, t=10502 jiffies, g=6481, q=402)
rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4294954130-4294943627), jiffies_till_next_fqs=1, root ->qsmask 0x0
kworker/u4:3    R  running task    31224  8416    198 0x80004008
Call Trace:
 <IRQ>
 sched_show_task+0x40f/0x560 kernel/sched/core.c:5954
 print_other_cpu_stall kernel/rcu/tree_stall.h:410 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:538 [inline]
 rcu_pending kernel/rcu/tree.c:2827 [inline]
 rcu_sched_clock_irq+0x1861/0x1ad0 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:__memcg_kmem_uncharge+0xd/0x1a0 mm/memcontrol.c:2908
Code: 81 c3 08 02 00 00 48 89 df 4c 89 f6 e8 8c 85 ff ff 5b 41 5e 5d c3 0f 1f 80 00 00 00 00 55 48 89 e5 41 57 41 56 41 55 41 54 53 <50> 89 f3 49 89 fc 48 b8 00 00 00 00 00 fc ff df 4c 8d 77 38 4d 89
RSP: 0018:ffffc90002247e08 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: ffffffff81489244 RBX: ffffea00024d4b40 RCX: ffff88809f27e500
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffea00024d4b40
RBP: ffffc90002247e30 R08: 000000000003a728 R09: ffffed101340ced1
R10: ffffed101340ced1 R11: 0000000000000000 R12: ffff88808b988020
R13: dffffc0000000000 R14: 1ffff11011731004 R15: ffff88809a067678
 memcg_kmem_uncharge include/linux/memcontrol.h:1402 [inline]
 free_thread_stack+0x12e/0x590 kernel/fork.c:284
 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
 schedule_tail+0x20/0x1a0 kernel/sched/core.c:3320
 ret_from_fork+0x8/0x30 arch/x86/entry/entry_64.S:336
rcu: rcu_preempt kthread starved for 10523 jiffies! g6481 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: RCU grace-period kthread stack dump:
rcu_preempt     R  running task    28984    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

Crashes (40):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/01/08 12:19 upstream ae6088216ce4 6738e0b3 .config console log report ci-upstream-kasan-gce-smack-root
2020/01/08 12:16 upstream ae6088216ce4 6738e0b3 .config console log report ci-upstream-kasan-gce-smack-root
2020/01/08 12:12 upstream ae6088216ce4 6738e0b3 .config console log report ci-upstream-kasan-gce-smack-root
2020/01/08 11:43 upstream ae6088216ce4 6738e0b3 .config console log report ci-upstream-kasan-gce-smack-root
2020/01/08 11:03 upstream ae6088216ce4 6738e0b3 .config console log report ci-upstream-kasan-gce-smack-root
2020/01/08 10:59 upstream ae6088216ce4 6738e0b3 .config console log report ci-upstream-kasan-gce-smack-root
2020/01/08 10:51 upstream ae6088216ce4 6738e0b3 .config console log report ci-upstream-kasan-gce-smack-root
2020/01/08 10:25 upstream ae6088216ce4 6738e0b3 .config console log report ci-upstream-kasan-gce-smack-root
2020/01/08 10:18 upstream ae6088216ce4 6738e0b3 .config console log report ci-upstream-kasan-gce-smack-root
2020/01/08 10:15 upstream ae6088216ce4 6738e0b3 .config console log report ci-upstream-kasan-gce-smack-root
2020/01/08 10:02 upstream ae6088216ce4 6738e0b3 .config console log report ci-upstream-kasan-gce-smack-root
2020/01/08 10:00 upstream ae6088216ce4 6738e0b3 .config console log report ci-upstream-kasan-gce-smack-root
2020/01/08 09:34 upstream ae6088216ce4 6738e0b3 .config console log report ci-upstream-kasan-gce-smack-root
2020/01/08 09:27 upstream ae6088216ce4 6738e0b3 .config console log report ci-upstream-kasan-gce-smack-root
2020/01/08 09:22 upstream ae6088216ce4 6738e0b3 .config console log report ci-upstream-kasan-gce-smack-root
2020/01/08 09:12 upstream ae6088216ce4 6738e0b3 .config console log report ci-upstream-kasan-gce-smack-root
2020/01/08 08:46 upstream ae6088216ce4 6738e0b3 .config console log report ci-upstream-kasan-gce-smack-root
2020/01/08 08:38 upstream ae6088216ce4 6738e0b3 .config console log report ci-upstream-kasan-gce-smack-root
2020/01/08 08:37 upstream ae6088216ce4 6738e0b3 .config console log report ci-upstream-kasan-gce-smack-root
2020/01/08 08:35 upstream ae6088216ce4 6738e0b3 .config console log report ci-upstream-kasan-gce-smack-root
2020/01/08 08:34 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 08:13 upstream ae6088216ce4 6738e0b3 .config console log report ci-upstream-kasan-gce-smack-root
2020/01/08 07:57 upstream ae6088216ce4 6738e0b3 .config console log report ci-upstream-kasan-gce-smack-root
2020/01/08 07:49 upstream ae6088216ce4 6738e0b3 .config console log report ci-upstream-kasan-gce-smack-root
2020/01/08 07:48 upstream ae6088216ce4 6738e0b3 .config console log report ci-upstream-kasan-gce-smack-root
2020/01/08 07:43 upstream ae6088216ce4 6738e0b3 .config console log report ci-upstream-kasan-gce-smack-root
2020/01/08 07:33 upstream ae6088216ce4 6738e0b3 .config console log report ci-upstream-kasan-gce-smack-root
2020/01/08 07:09 upstream ae6088216ce4 6738e0b3 .config console log report ci-upstream-kasan-gce-smack-root
2020/01/08 07:01 upstream ae6088216ce4 6738e0b3 .config console log report ci-upstream-kasan-gce-smack-root
2020/01/08 06:53 upstream ae6088216ce4 6738e0b3 .config console log report ci-upstream-kasan-gce-smack-root
2020/01/08 06:46 upstream ae6088216ce4 6738e0b3 .config console log report ci-upstream-kasan-gce-smack-root
2020/01/08 06:34 upstream ae6088216ce4 6738e0b3 .config console log report ci-upstream-kasan-gce-smack-root
2020/01/08 06:23 upstream ae6088216ce4 6738e0b3 .config console log report ci-upstream-kasan-gce-smack-root
2020/01/08 06:09 upstream ae6088216ce4 6738e0b3 .config console log report ci-upstream-kasan-gce-smack-root
2020/01/08 06:05 upstream ae6088216ce4 6738e0b3 .config console log report ci-upstream-kasan-gce-smack-root
2020/01/08 06:02 upstream ae6088216ce4 6738e0b3 .config console log report ci-upstream-kasan-gce-smack-root
2020/01/08 05:52 upstream ae6088216ce4 6738e0b3 .config console log report ci-upstream-kasan-gce-smack-root
2020/01/08 05:42 upstream ae6088216ce4 6738e0b3 .config console log report ci-upstream-kasan-gce-smack-root
* Struck through repros no longer work on HEAD.