INFO: rcu detected stall in sync_hw

Date	Name	Commit	Repro	Result
2024/01/04	upstream (ToT)	ac865f00af29	C	[report] INFO: rcu detected stall in worker_thread

Date

Name

Commit

Repro

Result

2024/01/04

upstream (ToT)

ac865f00af29

[report] INFO: rcu detected stall in worker_thread

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	INFO: rcu detected stall in sync_hw_clock kernel				3	478d	527d	0/26	auto-obsoleted due to no activity on 2023/04/21 23:58
upstream	BUG: soft lockup in sync_hw_clock efi	C			1	19d	15d	0/26	upstream: reported C repro on 2024/04/21 14:58

upstream

INFO: rcu detected stall in sync_hw_clock kernel

478d

527d

0/26

auto-obsoleted due to no activity on 2023/04/21 23:58

upstream

BUG: soft lockup in sync_hw_clock efi

19d

15d

0/26

upstream: reported C repro on 2024/04/21 14:58


Created	Duration	User	Repo	Result
2024/04/20 17:46	1h44m	bisect fix	linux-5.15.y	job log (0) log
2024/03/18 09:33	1h10m	bisect fix	linux-5.15.y	job log (0) log
2024/02/11 05:33	1h09m	bisect fix	linux-5.15.y	job log (0) log

rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: (detected by 1, t=10502 jiffies, g=3689, q=151) rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294966185-4294955683), jiffies_till_next_fqs=1, root ->qsmask 0x0 rcu: rcu_preempt kthread starved for 10502 jiffies! g3689 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. rcu: RCU grace-period kthread stack dump: task:rcu_preempt state:R running task stack:27000 pid: 15 ppid: 2 flags:0x00004000 Call Trace: <TASK> context_switch kernel/sched/core.c:5030 [inline] __schedule+0x12c4/0x45b0 kernel/sched/core.c:6376 schedule+0x11b/0x1f0 kernel/sched/core.c:6459 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1884 rcu_gp_fqs_loop+0x2bf/0x1080 kernel/rcu/tree.c:1972 rcu_gp_kthread+0xa4/0x360 kernel/rcu/tree.c:2145 kthread+0x3f6/0x4f0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 </TASK> rcu: Stack dump where RCU GP kthread last ran: Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 13 Comm: kworker/0:1 Not tainted 5.15.145-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 Workqueue: events_freezable_power_ sync_hw_clock RIP: 0010:lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 Code: 41 0f 94 c1 48 8b 7c 24 20 44 89 f6 8b 54 24 1c 48 8b 4c 24 30 4c 8b 44 24 38 6a 00 6a 00 ff 75 10 ff 74 24 40 e8 55 04 00 00 <48> 83 c4 20 48 c7 c7 20 22 8b 8a e8 b5 8d b9 08 b8 ff ff ff ff 65 RSP: 0018:ffffc90000007ac0 EFLAGS: 00000086 RAX: 0000000000000001 RBX: ffffc90000007b40 RCX: ffffffff81633742 RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffffffff8fbcf0c0 RBP: ffffc90000007c28 R08: dffffc0000000000 R09: fffffbfff1f79e19 R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92000000f64 R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000046 FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000600 CR3: 000000001d32a000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <NMI> </NMI> <IRQ> __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162 debug_object_deactivate+0x61/0x3f0 lib/debugobjects.c:759 debug_hrtimer_deactivate kernel/time/hrtimer.c:425 [inline] debug_deactivate+0x1b/0x1e0 kernel/time/hrtimer.c:481 __run_hrtimer kernel/time/hrtimer.c:1653 [inline] __hrtimer_run_queues+0x31d/0xcf0 kernel/time/hrtimer.c:1749 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1811 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline] __sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1096 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:raw_spin_rq_unlock_irq+0x19/0x80 kernel/sched/sched.h:1339 Code: 38 c1 7c cb 4c 89 f7 e8 25 79 70 00 eb c1 0f 1f 00 41 57 41 56 53 48 89 fb 66 90 48 89 df e8 7e 14 cc 08 e8 59 3e 2d 00 fb 5b <41> 5e 41 5f c3 49 bf 00 00 00 00 00 fc ff df 4c 8d b3 58 0d 00 00 RSP: 0018:ffffc90000d27788 EFLAGS: 00000282 RAX: 9e7f07506b184b00 RBX: ffff8880b9a39700 RCX: ffffffff8162eb78 RDX: dffffc0000000000 RSI: ffffffff8a8b0f80 RDI: ffffffff8ad88080 RBP: ffffc90000d27970 R08: dffffc0000000000 R09: fffffbfff1f79e35 R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88813fe20000 R13: dffffc0000000000 R14: ffff88813fe20000 R15: ffff88813fe20080 __schedule+0x1462/0x45b0 kernel/sched/core.c:6382 preempt_schedule_common+0x83/0xd0 kernel/sched/core.c:6552 preempt_schedule+0xd9/0xe0 kernel/sched/core.c:6577 preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:34 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] _raw_spin_unlock_irqrestore+0x128/0x130 kernel/locking/spinlock.c:194 hrtimer_start include/linux/hrtimer.h:418 [inline] sched_sync_hw_clock kernel/time/ntp.c:519 [inline] sync_hw_clock+0x418/0x520 kernel/time/ntp.c:660 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457 kthread+0x3f6/0x4f0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 </TASK> INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.351 msecs

Crashes (2):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2024/01/04 12:38	linux-5.15.y	d93fa2c78854	28c42cff	.config	console log	report	syz	C		[disk image] [vmlinux] [kernel image]	ci2-linux-5-15-kasan	INFO: rcu detected stall in sync_hw_clock
2024/02/15 17:25	linux-5.15.y	6139f2a02fe0	fd39cf6f	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci2-linux-5-15-kasan	INFO: rcu detected stall in sync_hw_clock

Crashes (2):

Assets (help?)