rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (10540 ticks this GP) idle=5ec4/1/0x4000000000000000 softirq=9538/9540 fqs=599
	(t=10500 jiffies g=9597 q=328 ncpus=2)
rcu: rcu_preempt kthread starved for 9298 jiffies! g9597 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R  running task     stack:27840 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5244 [inline]
 __schedule+0x10ec/0x40b0 kernel/sched/core.c:6561
 schedule+0xb9/0x180 kernel/sched/core.c:6637
 schedule_timeout+0x15c/0x280 kernel/time/timer.c:1965
 rcu_gp_fqs_loop+0x2f2/0x1310 kernel/rcu/tree.c:1706
 rcu_gp_kthread+0x95/0x380 kernel/rcu/tree.c:1905
 kthread+0x29d/0x330 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
NMI backtrace for cpu 1 skipped: idling at default_idle+0xb/0x10 arch/x86/kernel/process.c:741
CPU: 0 PID: 4441 Comm: syz.4.13 Not tainted 6.1.148-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
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: f5 ff 0f 1f 00 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 fe f8 42 f7 48 89 df e8 56 be 43 f7 e8 61 b0 66 f7 fb bf 01 00 00 00 <e8> 06 3c 37 f7 65 8b 05 57 05 e2 75 85 c0 74 02 5b c3 e8 a4 16 e0
RSP: 0018:ffffc9000485fbb8 EFLAGS: 00000286
RAX: 21a0bcdc9c06e600 RBX: ffff888055e6b780 RCX: 21a0bcdc9c06e600
RDX: dffffc0000000000 RSI: ffffffff8a8c0420 RDI: 0000000000000001
RBP: ffff888055e6ba18 R08: dffffc0000000000 R09: ffffed100abcd6f1
R10: ffffed100abcd6f1 R11: 1ffff1100abcd6f0 R12: 1ffff1100abcd743
R13: 0000000000000011 R14: dffffc0000000000 R15: 0000000000000000
FS:  00007fab215aa6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8b8b7b5f88 CR3: 0000000058a43000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 spin_unlock_irq include/linux/spinlock.h:401 [inline]
 get_signal+0x1163/0x1350 kernel/signal.c:2874
 arch_do_signal_or_restart+0xb0/0x1230 arch/x86/kernel/signal.c:871
 exit_to_user_mode_loop+0x70/0x110 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+0x16/0x40 kernel/entry/common.c:303
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fab2078ebe9
Code: 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 01 48
RSP: 002b:00007fab215aa0e8 EFLAGS: 00000246
RAX: fffffffffffffffc RBX: 00007fab209b5fa8 RCX: 00007fab2078ebe9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fab209b5fa8
RBP: 00007fab209b5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fab209b6038 R14: 00007ffe474c8530 R15: 00007ffe474c8618
 </TASK>