rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (1 GPs behind) idle=158c/0/0x1 softirq=8469/8470 fqs=0
	(t=10500 jiffies g=7525 q=268 ncpus=2)
rcu: rcu_preempt kthread timer wakeup didn't happen for 10499 jiffies! g7525 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=4160
rcu: rcu_preempt kthread starved for 10500 jiffies! g7525 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:26712 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 3769 Comm: syz-executor.1 Not tainted 6.1.94-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:35 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:106 [inline]
RIP: 0010:lock_is_held_type+0x65/0x180 kernel/locking/lockdep.c:5701
Code: 00 00 65 4c 8b 2d 1b 53 77 75 41 83 bd dc 0a 00 00 00 0f 85 db 00 00 00 41 89 f6 49 89 ff 48 c7 04 24 00 00 00 00 9c 8f 04 24 <4c> 8b 24 24 fa 48 c7 c7 20 0f ec 8a e8 9a 16 00 00 65 ff 05 63 5c
RSP: 0018:ffffc900001e0b70 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff8880173b3b80 RCX: ffff8880173b3b80
RDX: ffff8880173b3b80 RSI: 00000000ffffffff RDI: ffff88801b32e5d8
RBP: 00000000ffffffff R08: ffffffff8156ab38 R09: ffffffff8156a0cc
R10: 0000000000000002 R11: ffff8880173b3b80 R12: dffffc0000000000
R13: ffff8880173b3b80 R14: 00000000ffffffff R15: ffff88801b32e5d8
FS:  0000555556f71480(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7f46f82d58 CR3: 0000000056d00000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 lock_is_held include/linux/lockdep.h:283 [inline]
 signal_wake_up_state kernel/signal.c:769 [inline]
 signal_wake_up include/linux/sched/signal.h:457 [inline]
 complete_signal+0x75b/0xbd0 kernel/signal.c:1074
 send_sigqueue+0x44f/0x720 kernel/signal.c:2003
 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
 </IRQ>
 <TASK>
 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: b1 bc f5 ff 90 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 7e 2f d5 f6 48 89 df e8 e6 6c d6 f6 e8 01 f9 fb f6 fb bf 01 00 00 00 <e8> 56 05 c9 f6 65 8b 05 47 12 6d 75 85 c0 74 02 5b c3 e8 f4 35 6b
RSP: 0018:ffffc90004a37b30 EFLAGS: 00000286
RAX: 1a5c54e8049e5a00 RBX: ffff88801b32e5c0 RCX: ffffffff91c95103
RDX: dffffc0000000000 RSI: ffffffff8aec0240 RDI: 0000000000000001
RBP: ffffc90004a37c70 R08: dffffc0000000000 R09: ffffed1003665cb9
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff11003665d4b
R13: 000000001c000004 R14: 0000000000000021 R15: ffff88801b32ea58
 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: 0033:0x7f7f46238e35
Code: 85 e5 fe ff ff 0f b6 5c 24 0b 44 89 f2 45 89 f2 45 8d 5e 04 44 89 f0 48 8d 3d d7 71 16 00 89 c6 81 e6 ff 1f 00 00 48 8b 0c f7 <4c> 39 d1 0f 84 c7 fe ff ff 48 85 c9 0f 84 d9 00 00 00 83 c0 01 44
RSP: 002b:00007ffef246eaa0 EFLAGS: 00000202
RAX: 0000000081873304 RBX: 0000000000000001 RCX: 0000000081873304
RDX: 0000000081873304 RSI: 0000000000001304 RDI: 00007f7f463a0000
RBP: 00007f7f459fd008 R08: 0000001b33120000 R09: 0000000000000000
R10: 0000000081873304 R11: 0000000081873308 R12: 00000000000014d7
R13: ffffffff81873a3f R14: ffffffff81873304 R15: 00007f7f463b40e8
 </TASK>
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.1.94-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
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:113 [inline]
RIP: 0010:acpi_idle_do_entry+0x10f/0x340 drivers/acpi/processor_idle.c:572
Code: 43 f5 f6 48 83 e3 08 0f 85 0b 01 00 00 4c 8d 74 24 20 e8 a4 02 fc f6 0f 1f 44 00 00 e8 fa 3f f5 f6 0f 00 2d e3 10 b2 00 fb f4 <4c> 89 f3 48 c1 eb 03 42 80 3c 3b 00 74 08 4c 89 f7 e8 ab c0 4c f7
RSP: 0018:ffffffff8ce07b20 EFLAGS: 000002d3
RAX: ffffffff8a955356 RBX: 0000000000000000 RCX: ffffffff8cebd800
RDX: 0000000000000000 RSI: ffffffff8aec0240 RDI: ffffffff8b3d4660
RBP: ffffffff8ce07bb0 R08: ffffffff8a955338 R09: fffffbfff19d7b01
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffffffff19c0f64
R13: ffff888017f68804 R14: ffffffff8ce07b40 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7f46f81f80 CR3: 0000000056d00000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 acpi_idle_enter+0x352/0x4f0 drivers/acpi/processor_idle.c:709
 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
 rest_init+0x2da/0x300 init/main.c:733
 arch_call_rest_init+0xa/0xa init/main.c:893
 start_kernel+0x496/0x53f init/main.c:1140
 secondary_startup_64_no_verify+0xcf/0xdb
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 3769 Comm: syz-executor.1 Not tainted 6.1.94-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline]
RIP: 0010:check_preemption_disabled+0x20/0x110 lib/smp_processor_id.c:16
Code: 8b 48 c7 c6 40 46 3d 8b 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 08 65 8b 1d a0 e7 76 75 <65> 8b 05 41 3d 77 75 a9 ff ff ff 7f 74 22 65 48 8b 04 25 28 00 00
RSP: 0018:ffffc90004a377a0 EFLAGS: 00000086
RAX: 1a5c54e8049e5a00 RBX: 0000000000000001 RCX: ffff8880173b3b80
RDX: 0000000000000000 RSI: ffffffff8aec13c0 RDI: ffffffff8b3d4660
RBP: 0000000000000000 R08: ffffffff81cdd02c R09: ffffc90004a37a30
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000246
R13: ffff8880173b3b80 R14: 00000000ffffffff R15: ffffffff8d12ad20
FS:  0000555556f71480(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7f46f82d58 CR3: 0000000056d00000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 lockdep_recursion_finish kernel/locking/lockdep.c:467 [inline]
 lock_is_held_type+0xfd/0x180 kernel/locking/lockdep.c:5706
 lock_is_held include/linux/lockdep.h:283 [inline]
 __might_resched+0xa1/0x780 kernel/sched/core.c:9904
 __might_fault+0x69/0x110 mm/memory.c:5832
 __copy_to_user include/linux/uaccess.h:111 [inline]
 save_xstate_epilog arch/x86/kernel/fpu/signal.c:127 [inline]
 copy_fpstate_to_sigframe+0xb16/0xda0 arch/x86/kernel/fpu/signal.c:245
 get_sigframe+0x378/0x4b0 arch/x86/kernel/signal.c:297
 __setup_rt_frame arch/x86/kernel/signal.c:472 [inline]
 setup_rt_frame arch/x86/kernel/signal.c:784 [inline]
 handle_signal arch/x86/kernel/signal.c:828 [inline]
 arch_do_signal_or_restart+0x4ef/0x1a10 arch/x86/kernel/signal.c:873
 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: 0033:0x7f7f46238e35
Code: 85 e5 fe ff ff 0f b6 5c 24 0b 44 89 f2 45 89 f2 45 8d 5e 04 44 89 f0 48 8d 3d d7 71 16 00 89 c6 81 e6 ff 1f 00 00 48 8b 0c f7 <4c> 39 d1 0f 84 c7 fe ff ff 48 85 c9 0f 84 d9 00 00 00 83 c0 01 44
RSP: 002b:00007ffef246eaa0 EFLAGS: 00000202
RAX: 0000000081873304 RBX: 0000000000000001 RCX: 0000000081873304
RDX: 0000000081873304 RSI: 0000000000001304 RDI: 00007f7f463a0000
RBP: 00007f7f459fd008 R08: 0000001b33120000 R09: 0000000000000000
R10: 0000000081873304 R11: 0000000081873308 R12: 00000000000014d7
R13: ffffffff81873a3f R14: ffffffff81873304 R15: 00007f7f463b40e8
 </TASK>