INFO: rcu detected stall in sys_clock_nanosleep (4)

Status: auto-obsoleted due to no activity on 2022/12/31 21:43
Subsystems: kernel
[Documentation on labels]
First crash: 1521d, last: 1401d
▶ ▼ Similar bugs (11)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 INFO: rcu detected stall in sys_clock_nanosleep 1 1 1052d 1052d 0/3 auto-obsoleted due to no activity on 2023/12/20 18:13
linux-6.1 INFO: rcu detected stall in sys_clock_nanosleep (2) 1 4 777d 931d 0/3 auto-obsoleted due to no activity on 2024/09/21 09:26
upstream INFO: rcu detected stall in sys_clock_nanosleep (5) prio:normal kernel 1 syz, C error done 111 3d21h 1078d 0/29 upstream: reported C repro on 2023/08/17 09:25
upstream INFO: rcu detected stall in sys_clock_nanosleep (3) kernel 1 3 1698d 1708d 0/29 closed as invalid on 2022/02/08 10:00
upstream INFO: rcu detected stall in sys_clock_nanosleep kernel 1 1 1953d 1953d 0/29 auto-closed as invalid on 2021/06/22 18:23
linux-6.1 INFO: rcu detected stall in sys_clock_nanosleep 1 1 1229d 1229d 0/3 auto-obsoleted due to no activity on 2023/07/17 12:13
upstream INFO: rcu detected stall in sys_clock_nanosleep (2) kernel 1 1 1831d 1831d 0/29 auto-closed as invalid on 2021/10/22 22:53
linux-6.1 INFO: rcu detected stall in clock_nanosleep 1 6 119d 221d 0/3 auto-obsoleted due to no activity on 2026/07/11 04:07
linux-5.15 INFO: rcu detected stall in sys_clock_nanosleep (3) 1 6 290d 553d 0/3 auto-obsoleted due to no activity on 2026/01/20 16:04
linux-5.15 INFO: rcu detected stall in sys_clock_nanosleep (2) 1 2 855d 928d 0/3 auto-obsoleted due to no activity on 2024/07/04 20:17
linux-5.15 INFO: rcu detected stall in clock_nanosleep origin:lts-only 1 syz error 4 39d 163d 0/3 upstream: reported syz repro on 2026/02/17 07:30

Sample crash report:
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (3 ticks this GP) idle=9afc/1/0x4000000000000000 softirq=77020/77022 fqs=1012
	(detected by 0, t=10502 jiffies, g=111937, q=63 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 19216 Comm: syz-executor.4 Not tainted 6.0.0-rc6-syzkaller-00030-g06f7db949993 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2022
RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:85 [inline]
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:102 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:128 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0xde/0x180 mm/kasan/generic.c:189
Code: 74 f2 48 89 c2 b8 01 00 00 00 48 85 d2 75 56 5b 5d 41 5c c3 48 85 d2 74 5e 48 01 ea eb 09 48 83 c0 01 48 39 d0 74 50 80 38 00 <74> f2 eb d4 41 bc 08 00 00 00 48 89 ea 45 29 dc 4d 8d 1c 2c eb 0c
RSP: 0018:ffffc900001e09d8 EFLAGS: 00000046
RAX: fffffbfff211cb5f RBX: fffffbfff211cb60 RCX: ffffffff815ef65e
RDX: fffffbfff211cb60 RSI: 0000000000000008 RDI: ffffffff908e5af8
RBP: fffffbfff211cb5f R08: 0000000000000000 R09: ffffffff908e5aff
R10: fffffbfff211cb5f R11: 0000000000000000 R12: ffff888023f8c578
R13: 0000000000000000 R14: 0000000000000deb R15: ffff888023f8c598
FS:  000055555635f400(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020170000 CR3: 0000000021e5e000 CR4: 0000000000350ee0
Call Trace:
 <IRQ>
 instrument_atomic_read include/linux/instrumented.h:71 [inline]
 _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
 hlock_class kernel/locking/lockdep.c:227 [inline]
 mark_lock.part.0+0xee/0x1910 kernel/locking/lockdep.c:4610
 mark_lock kernel/locking/lockdep.c:4596 [inline]
 mark_usage kernel/locking/lockdep.c:4524 [inline]
 __lock_acquire+0x14a2/0x56d0 kernel/locking/lockdep.c:5007
 lock_acquire kernel/locking/lockdep.c:5666 [inline]
 lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5631
 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
 _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:349 [inline]
 advance_sched+0x53/0x9a0 net/sched/sch_taprio.c:716
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x5fa/0xe40 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
 __sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1112
 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:finish_task_switch.isra.0+0x2bf/0xc70 kernel/sched/core.c:5062
Code: 8b 3a 4c 89 e7 48 c7 02 00 00 00 00 ff d1 4d 85 ff 75 bf 4c 89 e7 e8 60 f8 ff ff e8 bb 43 2f 00 fb 65 48 8b 1c 25 80 6f 02 00 <48> 8d bb 98 15 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1
RSP: 0018:ffffc90014acfad0 EFLAGS: 00000202
RAX: 000000000000175b RBX: ffff888023f8bb00 RCX: 1ffffffff1bbd621
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90014acfb18 R08: 0000000000000001 R09: 0000000000000001
R10: ffffed10173473f0 R11: 0000000000000000 R12: ffff8880b9b39f80
R13: ffff88807ec23b00 R14: 0000000000000000 R15: ffff8880b9b3a9b8
 context_switch kernel/sched/core.c:5185 [inline]
 __schedule+0xae7/0x52b0 kernel/sched/core.c:6494
 schedule+0xda/0x1b0 kernel/sched/core.c:6570
 freezable_schedule include/linux/freezer.h:172 [inline]
 do_nanosleep+0x197/0x690 kernel/time/hrtimer.c:2044
 hrtimer_nanosleep+0x1f9/0x4a0 kernel/time/hrtimer.c:2097
 common_nsleep+0xa2/0xc0 kernel/time/posix-timers.c:1236
 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1276 [inline]
 __se_sys_clock_nanosleep kernel/time/posix-timers.c:1254 [inline]
 __x64_sys_clock_nanosleep+0x2f4/0x430 kernel/time/posix-timers.c:1254
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f5d5c6af371
Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 aa e7 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 e3 e7 ff ff 48 8b 04 24 eb 97 66 2e 0f 1f
RSP: 002b:00007ffca2194750 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: ffffffffffffffda RBX: 00007f5d5c79bf80 RCX: 00007f5d5c6af371
RDX: 00007ffca2194790 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f5d5c79d980 R08: 0000000000000000 R09: 00007ffca21aa080
R10: 0000000000000000 R11: 0000000000000293 R12: 00000000002115ab
R13: 00007ffca21948a0 R14: 00007f5d5c79c120 R15: 0000000000000032
 </TASK>
rcu: rcu_preempt kthread starved for 8478 jiffies! g111937 f0x0 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:28728 pid:   16 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5182 [inline]
 __schedule+0xadf/0x52b0 kernel/sched/core.c:6494
 schedule+0xda/0x1b0 kernel/sched/core.c:6570
 schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1935
 rcu_gp_fqs_loop+0x190/0x910 kernel/rcu/tree.c:1657
 rcu_gp_kthread+0x236/0x360 kernel/rcu/tree.c:1854
 kthread+0x2e4/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 0
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.0.0-rc6-syzkaller-00030-g06f7db949993 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2022
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 nmi_cpu_backtrace.cold+0x46/0x14f lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x206/0x250 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline]
 rcu_check_gp_kthread_starvation.cold+0x1fb/0x200 kernel/rcu/tree_stall.h:514
 print_other_cpu_stall kernel/rcu/tree_stall.h:619 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:762 [inline]
 rcu_pending kernel/rcu/tree.c:3660 [inline]
 rcu_sched_clock_irq+0x2404/0x2530 kernel/rcu/tree.c:2342
 update_process_times+0x11a/0x1a0 kernel/time/timer.c:1839
 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:243
 tick_sched_timer+0xee/0x120 kernel/time/tick-sched.c:1480
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x1c0/0xe40 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
 __sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1112
 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:29 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:130 [inline]
RIP: 0010:acpi_safe_halt+0x6f/0xb0 drivers/acpi/processor_idle.c:113
Code: f7 84 db 74 06 5b e9 30 d9 f8 f7 e8 2b d9 f8 f7 e8 56 50 ff f7 eb 0c e8 1f d9 f8 f7 0f 00 2d 88 9d d1 00 e8 13 d9 f8 f7 fb f4 <9c> 5b 81 e3 00 02 00 00 fa 31 ff 48 89 de e8 de d5 f8 f7 48 85 db
RSP: 0018:ffffffff8bc07d38 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffffffff8bcbc980 RSI: ffffffff89832fdd RDI: 0000000000000000
RBP: ffff8881455ba064 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001
R13: 0000000000000001 R14: ffff8881455ba000 R15: ffff8881460ac004
 acpi_idle_do_entry drivers/acpi/processor_idle.c:555 [inline]
 acpi_idle_enter+0x524/0x6a0 drivers/acpi/processor_idle.c:692
 cpuidle_enter_state+0x1ab/0xd30 drivers/cpuidle/cpuidle.c:239
 cpuidle_enter+0x4a/0xa0 drivers/cpuidle/cpuidle.c:356
 call_cpuidle kernel/sched/idle.c:155 [inline]
 cpuidle_idle_call kernel/sched/idle.c:236 [inline]
 do_idle+0x3e8/0x590 kernel/sched/idle.c:303
 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:400
 rest_init+0x169/0x270 init/main.c:727
 arch_call_rest_init+0xf/0x14 init/main.c:883
 start_kernel+0x46e/0x48f init/main.c:1138
 secondary_startup_64_no_verify+0xce/0xdb
 </TASK>

Crashes (6):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2022/09/21 21:39 upstream 06f7db949993 380f82fb .config console log report info ci-upstream-kasan-gce-root INFO: rcu detected stall in sys_clock_nanosleep
2022/09/19 11:35 upstream 521a547ced64 dd9a85ff .config console log report info ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_clock_nanosleep
2022/08/04 01:20 upstream 200e340f2196 1c9013ac .config console log report info ci-upstream-kasan-gce-smack-root INFO: rcu detected stall in sys_clock_nanosleep
2022/06/23 00:34 upstream 3abc3ae553c7 912f5df7 .config console log report info ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_clock_nanosleep
2022/05/30 20:44 upstream 2c5ca23f7414 af70c3a9 .config console log report info ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_clock_nanosleep
2022/09/28 01:34 linux-next aaa11ce2ffc8 75c78242 .config console log report info ci-upstream-linux-next-kasan-gce-root INFO: rcu detected stall in sys_clock_nanosleep
* Struck through repros no longer work on HEAD.