rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-...!: (1 GPs behind) idle=31b4/1/0x4000000000000000 softirq=8684/8685 fqs=0
(t=10500 jiffies g=8569 q=167 ncpus=2)
rcu: rcu_preempt kthread starved for 10500 jiffies! g8569 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:27032 pid:16 ppid:2 flags:0x00004000
Call Trace:
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
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: 3837 Comm: syz-executor.1 Not tainted 6.1.87-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:mark_lock+0x3/0x340 kernel/locking/lockdep.c:4589
Code: c1 0f 8c 73 ff ff ff 4c 89 ff e8 28 36 77 00 e9 66 ff ff ff e8 6e b7 1f 09 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 55 41 57 <41> 56 41 55 41 54 53 48 83 ec 10 49 89 f7 48 89 3c 24 49 bd 00 00
RSP: 0018:ffffc900000078e8 EFLAGS: 00000046
RAX: 0000000000000001 RBX: ffffffff901922d8 RCX: 00000000000c40a1
RDX: 0000000000000000 RSI: ffff88802174a918 RDI: ffff888021749dc0
RBP: ffff88802174a918 R08: dffffc0000000000 R09: fffffbfff2093445
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88802174a898
R13: ffff888021749dc0 R14: ffff88802174a938 R15: 1ffff110042e9527
FS: 00007fd170ebc6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd170ebbf80 CR3: 00000000221f0000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
mark_usage kernel/locking/lockdep.c:4520 [inline]
__lock_acquire+0xb40/0x1f80 kernel/locking/lockdep.c:5003
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
__lock_task_sighand+0x145/0x2d0 kernel/signal.c:1410
lock_task_sighand include/linux/sched/signal.h:745 [inline]
send_sigqueue+0x1de/0x720 kernel/signal.c:1978
posix_timer_event kernel/time/posix-timers.c:354 [inline]
posix_timer_fn+0x186/0x390 kernel/time/posix-timers.c:380
__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
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202
Code: c1 bc f5 ff 90 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 3e be d5 f6 48 89 df e8 a6 fb d6 f6 e8 71 86 fc f6 fb bf 01 00 00 00 56 88 c9 f6 65 8b 05 f7 a3 6d 75 85 c0 74 02 5b c3 e8 24 c9 6b
RSP: 0018:ffffc90004fc7b30 EFLAGS: 00000286
RAX: d69ce078a434cc00 RBX: ffff888055c44a00 RCX: ffffffff91c92103
RDX: dffffc0000000000 RSI: ffffffff8aec01c0 RDI: 0000000000000001
RBP: ffffc90004fc7c70 R08: dffffc0000000000 R09: ffffed100ab88941
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff1100ab889d3
R13: 000000001c000004 R14: 0000000000000021 R15: ffff888055c44e98
spin_unlock_irq include/linux/spinlock.h:401 [inline]
get_signal+0x154b/0x17d0 kernel/signal.c:2865
arch_do_signal_or_restart+0xb0/0x1a10 arch/x86/kernel/signal.c:871
exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:174
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303
do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fd17007dea7
Code: 14 25 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
RSP: 002b:00007fd170ebc178 EFLAGS: 00010246
RAX: 00000000000000ca RBX: 00007fd1701abf88 RCX: 00007fd17007dea9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fd1701abf88
RBP: 00007fd1701abf80 R08: 00007fd170ebc6c0 R09: 00007fd170ebc6c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd1701abf8c
R13: 000000000000000b R14: 00007ffc89ccab80 R15: 00007ffc89ccac68
CPU: 1 PID: 3794 Comm: syz-executor.2 Not tainted 6.1.87-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202
Code: c1 bc f5 ff 90 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 3e be d5 f6 48 89 df e8 a6 fb d6 f6 e8 71 86 fc f6 fb bf 01 00 00 00 56 88 c9 f6 65 8b 05 f7 a3 6d 75 85 c0 74 02 5b c3 e8 24 c9 6b
RSP: 0018:ffffc90004d57b30 EFLAGS: 00000286
RAX: d60ee1e9cbb0d300 RBX: ffff8880277fca00 RCX: ffffffff91c92103
RDX: dffffc0000000000 RSI: ffffffff8aec01c0 RDI: 0000000000000001
RBP: ffffc90004d57c70 R08: dffffc0000000000 R09: ffffed1004eff941
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff11004eff9d3
R13: 000000001c000004 R14: 0000000000000021 R15: ffff8880277fce98
FS: 00007f3aa3e296c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055555616d938 CR3: 000000001fb4f000 CR4: 00000000003526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
spin_unlock_irq include/linux/spinlock.h:401 [inline]
get_signal+0x154b/0x17d0 kernel/signal.c:2865
arch_do_signal_or_restart+0xb0/0x1a10 arch/x86/kernel/signal.c:871
exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:174
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303
do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f3aa307dea7
Code: 14 25 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
RSP: 002b:00007f3aa3e29178 EFLAGS: 00000246
RAX: 00000000000000ca RBX: 00007f3aa31abf88 RCX: 00007f3aa307dea9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f3aa31abf88
RBP: 00007f3aa31abf80 R08: 00007f3aa3e296c0 R09: 00007f3aa3e296c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3aa31abf8c
R13: 000000000000000b R14: 00007ffdda802490 R15: 00007ffdda802578
sched: RT throttling activated