rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 0, t=10502 jiffies, g=36085, q=23 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294976394-4294965892), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g36085 f0x2 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:26880 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:2168
 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
CPU: 1 PID: 7040 Comm: syz.4.587 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
RIP: 0010:sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1118
Code: f2 75 01 48 c7 c7 a0 e5 68 8a e8 00 1c 00 00 65 4c 8b 1d 00 09 f2 75 49 89 23 4c 89 dc e8 dd 1c 3e f7 48 89 df e8 85 d7 25 f7 <e8> c0 1d 3e f7 5c 48 c7 c7 c0 e5 68 8a e8 d3 1b 00 00 65 c6 05 db
RSP: 0018:ffffc900001e0ff8 EFLAGS: 00000086
RAX: 0000000000000001 RBX: ffffc9000e417ae8 RCX: 66383dfd5cb10c00
RDX: 0000000000000000 RSI: ffffffff8a68e5c0 RDI: ffffffff8abef920
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1bfe1c6
R10: fffffbfff1bfe1c6 R11: 1ffffffff1bfe1c5 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  0000555579fda500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3e0421 CR3: 0000000024462000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 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: f5 ff 0f 1f 00 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 ae 05 49 f7 48 89 df e8 06 cb 49 f7 e8 d1 bd 6c f7 fb bf 01 00 00 00 <e8> 96 43 3d f7 65 8b 05 27 f1 e7 75 85 c0 74 02 5b c3 e8 c4 02 e6
RSP: 0018:ffffc9000e417b98 EFLAGS: 00000282
RAX: 66383dfd5cb10c00 RBX: ffff8880560865c0 RCX: 66383dfd5cb10c00
RDX: dffffc0000000000 RSI: ffffffff8a6c0600 RDI: 0000000000000001
RBP: ffff888056086858 R08: dffffc0000000000 R09: ffffed100ac10cb9
R10: ffffed100ac10cb9 R11: 1ffff1100ac10cb8 R12: 1ffff1100ac10d0b
R13: 0000000000000011 R14: dffffc0000000000 R15: 0000000000000000
 spin_unlock_irq include/linux/spinlock.h:401 [inline]
 get_signal+0x1163/0x1350 kernel/signal.c:2874
 arch_do_signal_or_restart+0xb7/0x1240 arch/x86/kernel/signal.c:871
 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xee/0x180 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: 0033:0x7f765626f014
Code: 3f 48 3b 34 c1 0f 84 3b 01 00 00 48 83 c0 01 48 83 f8 04 75 ec 31 f6 80 7c 24 1e 00 0f 85 8e 01 00 00 41 83 c7 01 45 3b 78 04 <0f> 82 6c ff ff ff 80 7b 4e 00 0f 84 17 03 00 00 48 83 7b 50 03 c6
RSP: 002b:00007fff6787fab0 EFLAGS: 00000297
RAX: 000000110c298000 RBX: 00007f7657115720 RCX: 0000000000000001
RDX: 0000000000000e8d RSI: 00000000000030ba RDI: 0000000000000002
RBP: ffffffff89fc2e8d R08: 00007f76565e6038 R09: 00007f76565d2000
R10: 00007f7655dff008 R11: 0000000000000016 R12: 0000000000000016
R13: 0000000000000000 R14: ffffffff89fc2888 R15: 0000000000000eeb
 </TASK>