rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-...!: (3 GPs behind) idle=3b64/0/0x1 softirq=143538/143541 fqs=1
(t=10500 jiffies g=227241 q=112 ncpus=2)
rcu: rcu_preempt kthread starved for 10498 jiffies! g227241 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:26712 pid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x143f/0x4570 kernel/sched/core.c:6561
schedule+0xbf/0x180 kernel/sched/core.c:6637
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:295
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: 29669 Comm: syz.3.6854 Not tainted 6.1.133-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:irq_exit_rcu+0x0/0x20 kernel/softirq.c:673
Code: 80 c1 03 38 c1 7c 88 48 89 df e8 9b ad 8d 00 e9 7b ff ff ff 66 0f 1f 44 00 00 e8 7b 4b 5d 09 e9 16 ff ff ff 66 0f 1f 44 00 00 1b 00 00 00 48 c7 c7 e0 13 0b 8b e8 3f 4f 5d 09 65 ff 0d 2c 17
RSP: 0018:ffffc90000007ff0 EFLAGS: 00000086
RAX: 0000000000000000 RBX: ffffc90004affa88 RCX: ffffffff813a8003
RDX: 0000000000000000 RSI: ffffffff8b08fbc0 RDI: ffffffff8b5f70e0
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1d41776
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS: 00007fbebc5356c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f83b2010d58 CR3: 0000000050b15000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
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: f1 84 f5 ff 90 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 7e cb ae f6 48 89 df e8 e6 09 b0 f6 e8 a1 5b d5 f6 fb bf 01 00 00 00 f6 89 a2 f6 65 8b 05 b7 5f 46 75 85 c0 74 02 5b c3 e8 54 83 44
RSP: 0018:ffffc90004affb30 EFLAGS: 00000286
RAX: 97395ba4c62cd300 RBX: ffff88805624ca00 RCX: ffffffff973c3103
RDX: dffffc0000000000 RSI: ffffffff8b0c1dc0 RDI: 0000000000000001
RBP: ffffc90004affc70 R08: dffffc0000000000 R09: ffffed100ac49941
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff1100ac499d3
R13: 000000001c000004 R14: 0000000000000021 R15: ffff88805624ce98
spin_unlock_irq include/linux/spinlock.h:401 [inline]
get_signal+0x151f/0x17a0 kernel/signal.c:2874
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: 0033:0x7fbebb78d167
Code: ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89
RSP: 002b:00007fbebc5350e8 EFLAGS: 00000246
RAX: 00000000000000ca RBX: 00007fbebb9a6088 RCX: 00007fbebb78d169
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fbebb9a6088
RBP: 00007fbebb9a6080 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fbebb9a608c
R13: 0000000000000000 R14: 00007ffecb6a7d50 R15: 00007ffecb6a7e38
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.1.133-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:22 [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 drivers/acpi/processor_idle.c:112 [inline]
RIP: 0010:acpi_idle_do_entry+0x10f/0x340 drivers/acpi/processor_idle.c:567
Code: a8 ce f6 48 83 e3 08 0f 85 0b 01 00 00 4c 8d 74 24 20 e8 44 65 d5 f6 0f 1f 44 00 00 e8 6a a4 ce f6 0f 00 2d f3 b5 ad 00 fb f4 <4c> 89 f3 48 c1 eb 03 42 80 3c 3b 00 74 08 4c 89 f7 e8 0b 06 26 f7
RSP: 0018:ffffc90000177b80 EFLAGS: 000002d3
RAX: ffffffff8abc05e6 RBX: 0000000000000000 RCX: ffff888017ff1dc0
RDX: 0000000000000000 RSI: ffffffff8b0c1dc0 RDI: ffffffff8b5f70e0
RBP: ffffc90000177c10 R08: ffffffff8abc05c8 R09: ffffed1002ffe3b9
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff9200002ef70
R13: ffff88801af0c004 R14: ffffc90000177ba0 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbebc534f40 CR3: 0000000050b15000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
acpi_idle_enter+0x352/0x4f0 drivers/acpi/processor_idle.c:704
cpuidle_enter_state+0x516/0xf80 drivers/cpuidle/cpuidle.c:239
cpuidle_enter+0x59/0x90 drivers/cpuidle/cpuidle.c:356
call_cpuidle kernel/sched/idle.c:155 [inline]
cpuidle_idle_call kernel/sched/idle.c:236 [inline]
do_idle+0x3ce/0x680 kernel/sched/idle.c:303
cpu_startup_entry+0x3d/0x60 kernel/sched/idle.c:401
start_secondary+0xe4/0xf0 arch/x86/kernel/smpboot.c:281
secondary_startup_64_no_verify+0xcf/0xdb