INFO: rcu detected stall in call_timer

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	BUG: soft lockup in call_timer_fn net mm	1				19	734d	777d	0/29	auto-obsoleted due to no activity on 2024/10/08 10:43
linux-6.1	INFO: rcu detected stall in call_timer_fn	1				2	660d	731d	0/3	auto-obsoleted due to no activity on 2025/01/21 02:15
linux-4.19	INFO: rcu detected stall in call_timer_fn (2)	1				16	2098d	2372d	0/1	auto-closed as invalid on 2021/03/04 12:30
upstream	INFO: rcu detected stall in call_timer_fn (5) net input usb	1	syz, C			9	389d	523d	0/29	upstream: reported C repro on 2025/02/27 04:11
linux-4.14	INFO: rcu detected stall in call_timer_fn (2)	1				1	2161d	2161d	0/1	auto-closed as invalid on 2020/12/31 22:00
linux-5.15	INFO: rcu detected stall in call_timer_fn	1				10	18d	318d	0/3	upstream: reported on 2025/09/20 00:57
upstream	INFO: rcu detected stall in call_timer_fn (2) kernel	1	syz, C	done	error	47	1658d	2514d	0/29	closed as invalid on 2022/02/08 10:46
upstream	INFO: rcu detected stall in call_timer_fn bpf net	1				2	2851d	2864d	0/29	closed as dup on 2019/01/02 16:26
linux-6.1	INFO: rcu detected stall in call_timer_fn (2)	1				2	155d	176d	0/3	auto-obsoleted due to no activity on 2026/06/09 18:18
linux-4.14	INFO: rcu detected stall in call_timer_fn	1				5	2285d	2405d	0/1	auto-closed as invalid on 2020/08/29 09:07
upstream	INFO: rcu detected stall in call_timer_fn (4) mm	1				1	915d	915d	0/29	auto-obsoleted due to no activity on 2024/03/31 10:44
upstream	INFO: rcu detected stall in call_timer_fn (3) kernel	1				3	1397d	1412d	0/29	auto-obsoleted due to no activity on 2023/01/12 18:45
linux-6.1	INFO: rcu detected stall in call_timer_fn (3)	1				2	11d	24d	0/3	upstream: reported on 2026/07/10 22:14

rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: (detected by 0, t=10502 jiffies, g=177413, q=152) rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4295057507-4295047004), jiffies_till_next_fqs=1, root ->qsmask 0x0 syz-executor.0 R running task 27136 5311 32589 0x00000008 Call Trace: <IRQ> sched_show_task kernel/sched/core.c:5297 [inline] sched_show_task.cold+0x2ee/0x35d kernel/sched/core.c:5272 print_other_cpu_stall kernel/rcu/tree.c:1430 [inline] check_cpu_stall kernel/rcu/tree.c:1557 [inline] __rcu_pending kernel/rcu/tree.c:3293 [inline] rcu_pending kernel/rcu/tree.c:3336 [inline] rcu_check_callbacks.cold+0xaa1/0xd90 kernel/rcu/tree.c:2682 update_process_times+0x32/0x80 kernel/time/timer.c:1636 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:164 tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1274 __run_hrtimer kernel/time/hrtimer.c:1398 [inline] __hrtimer_run_queues+0x33b/0xdc0 kernel/time/hrtimer.c:1460 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1518 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1067 [inline] smp_apic_timer_interrupt+0x111/0x550 arch/x86/kernel/apic/apic.c:1092 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:lock_release+0x47a/0xa30 kernel/locking/lockdep.c:3922 Code: 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 a7 03 00 00 48 83 3d ed ad 1f 07 00 0f 84 65 02 00 00 48 8b bd 68 ff ff ff 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 48 c7 04 03 00 00 00 RSP: 0000:ffff8880ae807c50 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff10e48c1 RBX: 1ffff11015d00f90 RCX: 1ffff110056a8d5e RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 0000000000000282 RBP: ffff8880ae807d08 R08: ffff88802b546280 R09: 0000000000000000 R10: ffffed1015d04732 R11: ffff8880ae823993 R12: ffff88802b546280 R13: ffffffff815ba9eb R14: 0000000000000003 R15: ffff8880ae807ce0 call_timer_fn+0x1f8/0x720 kernel/time/timer.c:1329 expire_timers kernel/time/timer.c:1363 [inline] __run_timers kernel/time/timer.c:1682 [inline] __run_timers kernel/time/timer.c:1650 [inline] run_timer_softirq+0x652/0x1700 kernel/time/timer.c:1695 __do_softirq+0x25c/0x921 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x180/0x1d0 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x13b/0x550 arch/x86/kernel/apic/apic.c:1094 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893 </IRQ> RIP: 0033:0x402511 Code: db 34 b6 d7 82 de 1b 43 48 89 d0 48 f7 64 24 08 48 69 0c 24 e8 03 00 00 48 c1 ea 12 48 8b 74 24 18 64 48 33 34 25 28 00 00 00 <48> 8d 04 11 75 11 48 83 c4 28 c3 bf f0 e2 4b 00 31 c0 e8 78 f4 ff RSP: 002b:00007f8448a8bc60 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: d4f9c1f86597c292 RBX: 000000000075bf28 RCX: 000000000010c110 RDX: 000000000000030a RSI: 0000000000000000 RDI: 0000000000000001 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000075bf2c R13: 00000000004c848b R14: 00000000004df060 R15: 000000000075bf2c