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INFO: rcu detected stall in sys_clock_settime

Status: upstream: reported on 2023/04/11 17:25
Reported-by: syzbot+b416cb5da4c449ea0d75@syzkaller.appspotmail.com
First crash: 388d, last: 13d
▶ ▼ Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 INFO: rcu detected stall in sys_clock_settime 10 6d00h 295d 0/3 upstream: reported on 2023/07/13 03:09
upstream INFO: rcu detected stall in sys_clock_settime kernel C done inconclusive 278 19h38m 1391d 0/26 upstream: reported C repro on 2020/07/12 17:54

Sample crash report:
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (0 ticks this GP) idle=3444/1/0x4000000000000000 softirq=25658/25658 fqs=0
	(detected by 1, t=10505 jiffies, g=37493, q=84 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 7152 Comm: syz-executor.4 Not tainted 6.1.87-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:__lock_acquire+0xc95/0x1f80 kernel/locking/lockdep.c:5019
Code: f6 85 c0 0f 84 8f 08 00 00 48 c7 c0 60 21 c9 91 48 c1 e8 03 48 bf 00 00 00 00 00 fc ff df 0f b6 04 38 84 c0 0f 85 ea 0b 00 00 <83> 3d d4 aa 5e 10 00 75 39 48 63 9c 24 80 00 00 00 48 89 d8 48 c1
RSP: 0018:ffffc90000007a00 EFLAGS: 00000097
RAX: 0000000000000004 RBX: ffffffff90194b58 RCX: ffffffff91c92103
RDX: 0000000000000000 RSI: 0000000000000000 RDI: dffffc0000000000
RBP: ffff88801fa128f0 R08: dffffc0000000000 R09: fffffbfff2093445
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88801fa12898
R13: ffff88801fa11dc0 R14: ffff88801fa12910 R15: 1ffff11003f42522
FS:  00007f365889a6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3657bac018 CR3: 0000000075a0f000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
 __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+0x63/0x380 lib/debugobjects.c:752
 debug_hrtimer_deactivate kernel/time/hrtimer.c:425 [inline]
 debug_deactivate+0x1d/0x280 kernel/time/hrtimer.c:481
 __run_hrtimer kernel/time/hrtimer.c:1654 [inline]
 __hrtimer_run_queues+0x334/0xe50 kernel/time/hrtimer.c:1750
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1812
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
 __sysvec_apic_timer_interrupt+0x156/0x580 arch/x86/kernel/apic/apic.c:1112
 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xd4/0x130 kernel/locking/spinlock.c:194
Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 f2 3b 4d f7 f6 44 24 21 02 75 4e 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> d7 88 c9 f6 65 8b 05 78 a4 6d 75 85 c0 74 3f 48 c7 04 24 0e 36
RSP: 0018:ffffc9000ccdfb60 EFLAGS: 00000206
RAX: 288111f4debdea00 RBX: 1ffff9200199bf70 RCX: ffffffff816ad11a
RDX: dffffc0000000000 RSI: ffffffff8aec01c0 RDI: 0000000000000001
RBP: ffffc9000ccdfbf0 R08: dffffc0000000000 R09: fffffbfff2093445
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff9200199bf6c R14: ffffc9000ccdfb80 R15: 0000000000000246
 clock_was_set+0x179/0x900 kernel/time/hrtimer.c:970
 do_settimeofday64+0x673/0x7e0 kernel/time/timekeeping.c:1345
 __do_sys_clock_settime kernel/time/posix-timers.c:1119 [inline]
 __se_sys_clock_settime kernel/time/posix-timers.c:1107 [inline]
 __x64_sys_clock_settime+0x232/0x270 kernel/time/posix-timers.c:1107
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f3657a7dea9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f365889a0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e3
RAX: ffffffffffffffda RBX: 00007f3657babf80 RCX: 00007f3657a7dea9
RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000000
RBP: 00007f3657aca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f3657babf80 R15: 00007ffc9d0f3e48
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10504 jiffies! g37493 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=18551
rcu: rcu_preempt kthread starved for 10505 jiffies! g37493 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:26112 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x142d/0x4550 kernel/sched/core.c:6558
 schedule+0xbf/0x180 kernel/sched/core.c:6634
 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1965
 rcu_gp_fqs_loop+0x2d2/0x1150 kernel/rcu/tree.c:1706
 rcu_gp_kthread+0xa3/0x3b0 kernel/rcu/tree.c:1905
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </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: 7152 Comm: syz-executor.4 Not tainted 6.1.87-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:kasan_check_range+0x1/0x290 mm/kasan/generic.c:188
Code: 01 c6 48 89 c7 e8 8f 3f a9 08 31 c0 c3 0f 0b b8 ea ff ff ff c3 0f 0b b8 ea ff ff ff c3 cc cc cc cc cc cc cc cc cc cc cc cc 55 <41> 57 41 56 53 b0 01 48 85 f6 0f 84 9a 01 00 00 48 89 fd 48 01 f5
RSP: 0018:ffffc90000007b50 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff816a8a37
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8e737768
RBP: ffffc90000007ca0 R08: dffffc0000000000 R09: ffffed100b0021e5
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92000000f78
R13: ffffffff88b4881b R14: dffffc0000000000 R15: dffffc0000000000
FS:  00007f365889a6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3657bac018 CR3: 0000000075a0f000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 instrument_atomic_read include/linux/instrumented.h:72 [inline]
 _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
 cpumask_test_cpu include/linux/cpumask.h:444 [inline]
 cpu_online include/linux/cpumask.h:1030 [inline]
 trace_lock_release include/trace/events/lock.h:69 [inline]
 lock_release+0xc7/0xa20 kernel/locking/lockdep.c:5673
 __raw_spin_unlock include/linux/spinlock_api_smp.h:141 [inline]
 _raw_spin_unlock+0x12/0x40 kernel/locking/spinlock.c:186
 spin_unlock include/linux/spinlock.h:391 [inline]
 advance_sched+0x68b/0x970 net/sched/sch_taprio.c:749
 __run_hrtimer kernel/time/hrtimer.c:1686 [inline]
 __hrtimer_run_queues+0x5e5/0xe50 kernel/time/hrtimer.c:1750
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1812
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
 __sysvec_apic_timer_interrupt+0x156/0x580 arch/x86/kernel/apic/apic.c:1112
 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xd4/0x130 kernel/locking/spinlock.c:194
Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 f2 3b 4d f7 f6 44 24 21 02 75 4e 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> d7 88 c9 f6 65 8b 05 78 a4 6d 75 85 c0 74 3f 48 c7 04 24 0e 36
RSP: 0018:ffffc9000ccdfb60 EFLAGS: 00000206
RAX: 288111f4debdea00 RBX: 1ffff9200199bf70 RCX: ffffffff816ad11a
RDX: dffffc0000000000 RSI: ffffffff8aec01c0 RDI: 0000000000000001
RBP: ffffc9000ccdfbf0 R08: dffffc0000000000 R09: fffffbfff2093445
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff9200199bf6c R14: ffffc9000ccdfb80 R15: 0000000000000246
 clock_was_set+0x179/0x900 kernel/time/hrtimer.c:970
 do_settimeofday64+0x673/0x7e0 kernel/time/timekeeping.c:1345
 __do_sys_clock_settime kernel/time/posix-timers.c:1119 [inline]
 __se_sys_clock_settime kernel/time/posix-timers.c:1107 [inline]
 __x64_sys_clock_settime+0x232/0x270 kernel/time/posix-timers.c:1107
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f3657a7dea9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f365889a0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e3
RAX: ffffffffffffffda RBX: 00007f3657babf80 RCX: 00007f3657a7dea9
RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000000
RBP: 00007f3657aca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f3657babf80 R15: 00007ffc9d0f3e48
 </TASK>

Crashes (24):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/04/20 13:24 linux-6.1.y 6741e066ec76 af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in sys_clock_settime
2024/04/07 14:42 linux-6.1.y 347385861c50 ca620dd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in sys_clock_settime
2024/04/07 06:41 linux-6.1.y 347385861c50 ca620dd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in sys_clock_settime
2024/03/28 15:19 linux-6.1.y e5cd595e23c1 e91187ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in sys_clock_settime
2024/01/24 16:41 linux-6.1.y 8fd7f4462453 1e153dc8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in sys_clock_settime
2024/01/18 16:41 linux-6.1.y fec3b1451d5f 239abf84 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in sys_clock_settime
2023/12/11 18:07 linux-6.1.y e7cddbb41b63 28b24332 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in sys_clock_settime
2023/10/30 14:06 linux-6.1.y 32c9cdbe383c b5729d82 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in sys_clock_settime
2023/09/23 19:00 linux-6.1.y d23900f974e0 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in sys_clock_settime
2023/08/22 04:55 linux-6.1.y 6c44e13dc284 6b415825 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in sys_clock_settime
2023/08/08 16:45 linux-6.1.y 52a953d0934b 9552ae77 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in sys_clock_settime
2023/07/26 15:54 linux-6.1.y 5302e81aa209 41fe1bae .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in sys_clock_settime
2023/07/20 22:56 linux-6.1.y a456e1743881 f49af159 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in sys_clock_settime
2023/07/17 13:59 linux-6.1.y 61fd484b2cf6 20f8b3c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in sys_clock_settime
2023/07/14 22:17 linux-6.1.y 61fd484b2cf6 35d9ecc5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in sys_clock_settime
2023/07/13 06:32 linux-6.1.y 61fd484b2cf6 86081196 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in sys_clock_settime
2023/07/07 23:29 linux-6.1.y 61fd484b2cf6 668cb1fa .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in sys_clock_settime
2023/07/05 23:39 linux-6.1.y 0f4ac6b4c5f0 ba5dba36 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in sys_clock_settime
2023/06/30 00:27 linux-6.1.y a1c449d00ff8 01298212 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in sys_clock_settime
2023/05/26 11:55 linux-6.1.y a343b0dd87b4 b40ef614 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in sys_clock_settime
2023/05/09 08:06 linux-6.1.y ca48fc16c493 c7a5e2a0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in sys_clock_settime
2023/04/29 02:56 linux-6.1.y ca1c9012c941 62df2017 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in sys_clock_settime
2023/04/20 04:03 linux-6.1.y 0102425ac76b a219f34e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in sys_clock_settime
2023/04/11 17:25 linux-6.1.y 543aff194ab6 49faf98d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in sys_clock_settime
* Struck through repros no longer work on HEAD.