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INFO: rcu detected stall in __mod_timer

Status: auto-closed as invalid on 2020/06/13 13:03
Subsystems: kernel
[Documentation on labels]
First crash: 1585d, last: 1585d
Similar bugs (4)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: rcu detected stall in __mod_timer (5) usb C error 6 12d 45d 0/27 upstream: reported C repro on 2024/06/02 14:58
upstream INFO: rcu detected stall in __mod_timer (3) perf 24 898d 1124d 0/27 closed as invalid on 2022/02/08 10:00
upstream INFO: rcu detected stall in __mod_timer (2) kernel 17 1269d 1475d 0/27 auto-closed as invalid on 2021/05/17 11:36
upstream INFO: rcu detected stall in __mod_timer (4) net 1 682d 682d 0/27 auto-obsoleted due to no activity on 2022/12/03 01:18

Sample crash report:
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 1, t=10502 jiffies, g=7933, q=794)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294962684-4294952182), jiffies_till_next_fqs=1, root ->qsmask 0x0
syz-executor.0  R  running task    26560  8635   8558 0x8000400c
Call Trace:
 <IRQ>
 sched_show_task+0x408/0x560 kernel/sched/core.c:5952
 print_other_cpu_stall kernel/rcu/tree_stall.h:430 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:558 [inline]
 rcu_pending kernel/rcu/tree.c:3030 [inline]
 rcu_sched_clock_irq+0x147c/0x1970 kernel/rcu/tree.c:2276
 update_process_times+0x12c/0x180 kernel/time/timer.c:1726
 tick_sched_handle kernel/time/tick-sched.c:171 [inline]
 tick_sched_timer+0x254/0x410 kernel/time/tick-sched.c:1314
 __run_hrtimer kernel/time/hrtimer.c:1517 [inline]
 __hrtimer_run_queues+0x3cf/0x7d0 kernel/time/hrtimer.c:1579
 hrtimer_interrupt+0x373/0xd60 kernel/time/hrtimer.c:1641
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1119 [inline]
 smp_apic_timer_interrupt+0x109/0x280 arch/x86/kernel/apic/apic.c:1144
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:759 [inline]
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xa5/0xd0 kernel/locking/spinlock.c:191
Code: b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 0c 48 c7 c7 58 d4 0a 89 e8 7a 9b b6 f9 48 83 3d 7a 84 10 01 00 74 2c 4c 89 f7 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 0c 41 57 f9 65 8b 05 d1 cd 07 78
RSP: 0018:ffffc90000da8ca8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff1215a8b RBX: ffff8880ae927240 RCX: dffffc0000000000
RDX: dffffc0000000000 RSI: 0000000000000008 RDI: 0000000000000282
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff15dbb2e
R10: fffffbfff15dbb2e R11: 0000000000000000 R12: ffff8880ae927240
R13: 1ffff11013e809c4 R14: 0000000000000282 R15: ffff88809f404e20
 __mod_timer+0xefa/0x1550 kernel/time/timer.c:1057
 call_timer_fn+0x91/0x160 kernel/time/timer.c:1404
 expire_timers kernel/time/timer.c:1449 [inline]
 __run_timers+0x776/0x970 kernel/time/timer.c:1773
 run_timer_softirq+0x46/0x80 kernel/time/timer.c:1786
 __do_softirq+0x268/0x7c5 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x223/0x230 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:546 [inline]
 smp_apic_timer_interrupt+0x113/0x280 arch/x86/kernel/apic/apic.c:1146
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
 </IRQ>
RIP: 0010:preempt_schedule_irq+0xc0/0x150 kernel/sched/core.c:4337
Code: 80 f9 43 80 3c 37 00 74 0c 48 c7 c7 68 d4 0a 89 e8 65 57 b7 f9 48 83 3d 75 40 11 01 00 0f 84 81 00 00 00 fb 66 0f 1f 44 00 00 <bf> 01 00 00 00 e8 f6 ed ff ff 43 80 3c 34 00 74 0c 48 c7 c7 60 d4
RSP: 0018:ffffc90002b87a90 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: ffff888097084d94 RBX: 0000000000000000 RCX: ffffffff815a5f87
RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffff888097084d44
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff15dbb1b
R10: fffffbfff15dbb1b R11: 0000000000000000 R12: 1ffffffff1215a8c
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffffffff1215a8d
 retint_kernel+0x1b/0x2b
RIP: 0010:acct_collect+0xfb/0x5f0 kernel/acct.c:547
Code: 88 00 00 00 45 31 e4 0f 1f 84 00 00 00 00 00 48 8d 7d 08 48 89 f8 48 c1 e8 03 42 80 3c 28 00 74 05 e8 19 27 45 00 48 8b 5d 08 <48> 89 e8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 ef e8 ff 26 45 00
RSP: 0018:ffffc90002b87b68 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 1ffff11012d61ccf RBX: 00007f631c8c7000 RCX: ffff888097084500
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff888096b0e678
RBP: ffff888096b0e670 R08: dffffc0000000000 R09: ffffed100a0bbdc8
R10: ffffed100a0bbdc8 R11: 0000000000000000 R12: 00000000026ee000
R13: dffffc0000000000 R14: ffff8880a2d1d780 R15: ffff8880505ded80
 do_exit+0x509/0x1f80 kernel/exit.c:780
 do_group_exit+0x15e/0x2c0 kernel/exit.c:899
 get_signal+0x13cf/0x1d60 kernel/signal.c:2739
 do_signal+0x33/0x610 arch/x86/kernel/signal.c:813

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/03/15 12:59 upstream d3dca69085e9 749688d2 .config console log report ci-upstream-kasan-gce-smack-root
* Struck through repros no longer work on HEAD.