INFO: rcu detected stall in process_one_work

Status: auto-obsoleted due to no activity on 2024/09/27 05:22
Reported-by: syzbot+927883d76da2fbdde4d8@syzkaller.appspotmail.com
First crash: 873d, last: 770d
▶ ▼ Similar bugs (10)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 INFO: rcu detected stall in process_one_work (3) origin:upstream 1 syz error 3 202d 318d 0/3 upstream: reported syz repro on 2025/09/13 13:36
upstream INFO: rcu detected stall in process_one_work (2) kernel 1 1 2299d 2299d 0/29 auto-closed as invalid on 2020/07/10 22:43
upstream INFO: rcu detected stall in process_one_work (4) kernel 1 1 1774d 1774d 0/29 auto-closed as invalid on 2021/12/18 04:26
upstream INFO: rcu detected stall in process_one_work (8) kernel 1 3 952d 1002d 0/29 auto-obsoleted due to no activity on 2024/03/18 23:07
linux-5.15 INFO: rcu detected stall in process_one_work (2) 1 1 588d 588d 0/3 auto-obsoleted due to no activity on 2025/03/27 21:48
upstream INFO: rcu detected stall in process_one_work kernel 1 8 2538d 2981d 0/29 auto-closed as invalid on 2019/11/14 14:39
upstream INFO: rcu detected stall in process_one_work (9) prio:high kernel 1 syz, C error error 21 17d 785d 0/29 upstream: reported C repro on 2024/06/03 12:55
upstream INFO: rcu detected stall in process_one_work (5) kernel 1 1 1419d 1419d 0/29 auto-obsoleted due to no activity on 2022/12/07 18:00
linux-6.1 INFO: rcu detected stall in process_one_work origin:upstream 1 syz, C error 3 10h06m 931d 0/3 upstream: reported C repro on 2024/01/09 18:19
upstream INFO: rcu detected stall in process_one_work (3) kernel 1 syz, C done done 1 2121d 2162d 15/29 fixed on 2020/11/16 12:12

Sample crash report:
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (1 GPs behind) idle=8f7/1/0x4000000000000000 softirq=23099/23100 fqs=5 
	(detected by 1, t=10502 jiffies, g=29937, q=96)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4250 Comm: kworker/0:16 Not tainted 5.15.161-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Workqueue: events_freezable_power_ sync_hw_clock
RIP: 0010:check_preemption_disabled+0x2/0x110 lib/smp_processor_id.c:13
Code: 48 c7 c7 20 fc 92 8a e8 2c 01 00 00 65 ff 0d 01 03 e5 75 5b c3 cc cc cc 48 c7 c7 e0 f6 d8 8a 48 c7 c6 20 f7 d8 8a eb 00 41 57 <41> 56 41 54 53 48 83 ec 10 65 48 8b 04 25 28 00 00 00 48 89 44 24
RSP: 0018:ffffc90000007c68 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 0000000000000002 RCX: ffff88807ea69dc0
RDX: ffff88807ea69dc0 RSI: ffffffff8a8b3ca0 RDI: ffffffff8ad8f740
RBP: 0000000000000001 R08: ffffffff886c6a7e R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 0000000000000046
R13: ffff88807ea69dc0 R14: 00000000ffffffff R15: ffff88801a7e9300
FS:  0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e32b000 CR3: 00000000753e8000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 lockdep_recursion_finish kernel/locking/lockdep.c:436 [inline]
 lock_is_held_type+0xfd/0x180 kernel/locking/lockdep.c:5667
 lock_is_held include/linux/lockdep.h:287 [inline]
 advance_sched+0xd0/0x940 net/sched/sch_taprio.c:719
 __run_hrtimer kernel/time/hrtimer.c:1686 [inline]
 __hrtimer_run_queues+0x598/0xcf0 kernel/time/hrtimer.c:1750
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1812
 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:lock_acquire+0x252/0x4f0 kernel/locking/lockdep.c:5627
Code: 2b 00 74 08 4c 89 f7 e8 0c 7e 67 00 f6 44 24 61 02 0f 85 84 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25
RSP: 0018:ffffc90002f37b00 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff920005e6f6c RCX: ffffffff913f0f03
RDX: dffffc0000000000 RSI: ffffffff8a8b3ca0 RDI: ffffffff8ad8f740
RBP: ffffc90002f37c48 R08: dffffc0000000000 R09: fffffbfff21931c2
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920005e6f68
R13: dffffc0000000000 R14: ffffc90002f37b60 R15: 0000000000000246
 process_one_work+0x7f1/0x10c0 kernel/workqueue.c:2286
 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
 kthread+0x3f6/0x4f0 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:300
 </TASK>
rcu: rcu_preempt kthread starved for 10492 jiffies! g29937 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
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:26712 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:1914
 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:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:300
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 1
CPU: 1 PID: 6963 Comm: syz-executor.1 Not tainted 5.15.161-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline]
 rcu_check_gp_kthread_starvation+0x1d2/0x240 kernel/rcu/tree_stall.h:487
 print_other_cpu_stall+0x137a/0x14d0 kernel/rcu/tree_stall.h:592
 check_cpu_stall kernel/rcu/tree_stall.h:745 [inline]
 rcu_pending kernel/rcu/tree.c:3932 [inline]
 rcu_sched_clock_irq+0xa38/0x1150 kernel/rcu/tree.c:2619
 update_process_times+0x196/0x200 kernel/time/timer.c:1818
 tick_sched_handle kernel/time/tick-sched.c:254 [inline]
 tick_sched_timer+0x386/0x550 kernel/time/tick-sched.c:1473
 __run_hrtimer kernel/time/hrtimer.c:1686 [inline]
 __hrtimer_run_queues+0x55b/0xcf0 kernel/time/hrtimer.c:1750
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1812
 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:get_current arch/x86/include/asm/current.h:15 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x4/0x60 kernel/kcov.c:196
Code: 00 00 00 0f 1f 00 53 48 89 fb e8 17 00 00 00 48 8b 3d 98 13 64 0c 48 89 de 5b e9 47 f7 48 00 cc cc cc cc cc cc cc 48 8b 04 24 <65> 48 8b 0d e4 14 82 7e 65 8b 15 e5 14 82 7e f7 c2 00 01 ff 00 74
RSP: 0018:ffffc90004037498 EFLAGS: 00000202
RAX: ffffffff81748f14 RBX: 1ffff11017348509 RCX: ffff8880745a5940
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900040375e0 R08: ffffffff81748ee4 R09: ffffed101736767b
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: ffff8880b9a42848 R14: ffff8880b9b3b3c0 R15: 0000000000000001
 csd_lock_wait kernel/smp.c:440 [inline]
 smp_call_function_many_cond+0xab4/0xd90 kernel/smp.c:969
 on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1135
 __flush_tlb_multi arch/x86/include/asm/paravirt.h:87 [inline]
 flush_tlb_multi arch/x86/mm/tlb.c:900 [inline]
 flush_tlb_mm_range+0x2a5/0x4a0 arch/x86/mm/tlb.c:986
 tlb_flush arch/x86/include/asm/tlb.h:23 [inline]
 tlb_flush_mmu_tlbonly+0x1ab/0x410 include/asm-generic/tlb.h:430
 tlb_flush_mmu mm/mmu_gather.c:246 [inline]
 tlb_finish_mmu+0xd2/0x320 mm/mmu_gather.c:338
 exit_mmap+0x3cd/0x670 mm/mmap.c:3188
 __mmput+0x112/0x3b0 kernel/fork.c:1126
 exit_mm+0x688/0x7f0 kernel/exit.c:548
 do_exit+0x626/0x2480 kernel/exit.c:859
 do_group_exit+0x144/0x310 kernel/exit.c:994
 get_signal+0xc66/0x14e0 kernel/signal.c:2889
 arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:867
 handle_signal_work kernel/entry/common.c:154 [inline]
 exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:178
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x5d/0x240 kernel/entry/common.c:307
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7ff9c1e6af29
Code: Unable to access opcode bytes at RIP 0x7ff9c1e6aeff.
RSP: 002b:00007ff9c09e4178 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007ff9c1fa1f88 RCX: 00007ff9c1e6af29
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007ff9c1fa1f88
RBP: 00007ff9c1fa1f80 R08: 00007ff9c09e46c0 R09: 00007ff9c09e46c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff9c1fa1f8c
R13: 000000000000000b R14: 00007ffebb8cbb90 R15: 00007ffebb8cbc78
 </TASK>

Crashes (3):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/06/19 05:22 linux-5.15.y 4878aadf2d15 41b7e219 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan INFO: rcu detected stall in process_one_work
2024/04/14 03:37 linux-5.15.y fa3df276cd36 c8349e48 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan INFO: rcu detected stall in process_one_work
2024/03/08 03:58 linux-5.15.y 574362648507 cf82cde1 .config console log report info ci2-linux-5-15-kasan INFO: rcu detected stall in process_one_work
* Struck through repros no longer work on HEAD.