rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 0, t=10502 jiffies, g=13637, q=91)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294967672-4294957170), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g13637 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:27880 pid:   15 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5049 [inline]
 __schedule+0x11bb/0x4390 kernel/sched/core.c:6395
 preempt_schedule_irq+0xb1/0x150 kernel/sched/core.c:6799
 irqentry_exit+0x63/0x70 kernel/entry/common.c:432
 asm_sysvec_reschedule_ipi+0x16/0x20 arch/x86/include/asm/idtentry.h:681
RIP: 0010:rcu_gp_fqs_loop+0x250/0x11b0 kernel/rcu/tree.c:1972
Code: ff df 4c 89 ac 24 c8 00 00 00 48 8b 44 24 68 80 3c 10 00 74 0d 48 8d bc 24 d0 00 00 00 e8 a8 7a 57 00 4c 89 ac 24 d0 00 00 00 <48> c7 c7 20 10 12 8c 48 8d b4 24 c0 00 00 00 ba 02 04 00 00 e8 77
RSP: 0018:ffffc90000d47cc0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88813feabb80
RDX: 0000000000000000 RSI: ffffffffffffffc2 RDI: 0000000000000000
RBP: ffffc90000d47e10 R08: dffffc0000000000 R09: ffffc90000d47a60
R10: fffff520001a8f5c R11: 1ffff920001a8f4c R12: 1ffffffff17c1e30
R13: ffffc90000d47d88 R14: 0000000000000000 R15: 0000000000000001
 rcu_gp_kthread+0x98/0x350 kernel/rcu/tree.c:2145
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </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: 5360 Comm: syz.1.251 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:check_preemption_disabled+0x13/0x110 lib/smp_processor_id.c:13
Code: 59 76 5b c3 00 00 cc 48 c7 c7 20 e5 59 8a 48 c7 c6 60 e5 59 8a eb 00 55 41 57 41 56 53 48 83 ec 10 65 48 8b 04 25 28 00 00 00 <48> 89 44 24 08 65 8b 05 49 97 58 76 65 8b 0d b2 f1 58 76 f7 c1 ff
RSP: 0018:ffffc90000dd0f70 EFLAGS: 00000082
RAX: 92a765bddc889c00 RBX: 0000000000000001 RCX: ffffffff81325333
RDX: 0000000000000000 RSI: ffffffff8a59e560 RDI: ffffffff8a59e520
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1ad33a6
R10: fffffbfff1ad33a6 R11: 1ffffffff1ad33a5 R12: dffffc0000000000
R13: 0000000000000000 R14: 1ffff11017224e50 R15: 0000000000000000
FS:  0000555566819500(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000058 CR3: 000000005139d000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:331 [inline]
 rcu_is_watching+0x11/0xa0 kernel/rcu/tree.c:1123
 trace_local_timer_exit arch/x86/include/asm/trace/irq_vectors.h:41 [inline]
 __sysvec_apic_timer_interrupt+0x172/0x4a0 arch/x86/kernel/apic/apic.c:1115
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202
Code: f6 ff 0f 1f 00 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 de 9e a9 f7 48 89 df e8 a6 73 aa f7 e8 41 0d cb f7 fb bf 01 00 00 00 <e8> 76 95 9e f7 65 8b 05 07 93 4f 76 85 c0 74 02 5b c3 e8 b4 9d 4d
RSP: 0018:ffffc9000341fcf0 EFLAGS: 00000286
RAX: 92a765bddc889c00 RBX: ffff88807ae38940 RCX: 92a765bddc889c00
RDX: dffffc0000000000 RSI: ffffffff8a0b1c60 RDI: 0000000000000001
RBP: ffffc9000341ff10 R08: dffffc0000000000 R09: ffffed100f5c7129
R10: ffffed100f5c7129 R11: 1ffff1100f5c7128 R12: ffff888018fd9dc0
R13: 1ffff92000683ffe R14: 1ffff92000683fa8 R15: ffffc9000341fff0
 __ia32_sys_rt_sigreturn+0x184/0x790 arch/x86/kernel/signal.c:672
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f4381356779
Code: 64 c7 00 16 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 90 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 c7 c0 0f 00 00 00 0f 05 <0f> 1f 80 00 00 00 00 48 81 ec 48 01 00 00 49 89 d0 64 48 8b 04 25
RSP: 002b:00007ffe7a1961c0 EFLAGS: 00000202 ORIG_RAX: 000000000000000f
RAX: ffffffffffffffda RBX: 0000000000031124 RCX: 00007f4381356779
RDX: 00007ffe7a1961c0 RSI: 00007ffe7a1962f0 RDI: 0000000000000021
RBP: 0000000000000032 R08: 003aac3c74168f5e R09: 000000117a196a5f
R10: 00007ffe7a196860 R11: 0000000000000202 R12: 00007f438161118c
R13: 00007ffe7a196860 R14: 0000000000031156 R15: 00007ffe7a196880
 </TASK>