rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 0, t=10502 jiffies, g=9109, q=12 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294957402-4294946900), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g9109 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:27656 pid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5381 [inline]
 __schedule+0x1553/0x45a0 kernel/sched/core.c:6700
 schedule+0xbd/0x170 kernel/sched/core.c:6774
 schedule_timeout+0x188/0x2d0 kernel/time/timer.c:2168
 rcu_gp_fqs_loop+0x313/0x1590 kernel/rcu/tree.c:1667
 rcu_gp_kthread+0x9d/0x3b0 kernel/rcu/tree.c:1866
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </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: 5780 Comm: syz-executor377 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:27 [inline]
RIP: 0010:static_key_false include/linux/jump_label.h:207 [inline]
RIP: 0010:trace_local_timer_exit arch/x86/include/asm/trace/irq_vectors.h:41 [inline]
RIP: 0010:__sysvec_apic_timer_interrupt+0xfb/0x3b0 arch/x86/kernel/apic/apic.c:1095
Code: e8 1a 68 a6 00 48 83 3b 00 0f 84 8e 00 00 00 65 ff 05 31 d8 ca 7e 43 80 3c 26 00 74 08 48 89 df e8 fa 67 a6 00 48 89 df ff 13 <0f> 1f 44 00 00 65 8b 05 15 d9 ca 7e 83 f8 08 0f 83 f5 00 00 00 89
RSP: 0018:ffffc900001f0fd0 EFLAGS: 00000082
RAX: 0000000000000000 RBX: ffff8880b8f28280 RCX: ffff88802f9b0000
RDX: 0000000000010000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff8e8adeaf R09: 1ffffffff1d15bd5
R10: dffffc0000000000 R11: fffffbfff1d15bd6 R12: dffffc0000000000
R13: 0000000000000000 R14: 1ffff110171e5050 R15: 0000000000000000
FS:  00007fa217c016c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000006b000 CR3: 000000002e6b2000 CR4: 00000000003506e0
Call Trace:
 <IRQ>
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
 sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1088
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202
Code: 00 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 ba 8c da f6 48 89 df e8 72 61 db f6 e8 8d 6e ff f6 fb bf 01 00 00 00 <e8> 92 68 ce f6 65 8b 05 63 9f 75 75 85 c0 74 02 5b c3 e8 e0 86 72
RSP: 0018:ffffc9000467fc78 EFLAGS: 00000286
RAX: f89dee5c92bc1100 RBX: ffff88802d7f0000 RCX: f89dee5c92bc1100
RDX: dffffc0000000000 RSI: ffffffff8acac900 RDI: 0000000000000001
RBP: ffff88802d7f0498 R08: ffffffff8e8adeaf R09: 1ffffffff1d15bd5
R10: dffffc0000000000 R11: fffffbfff1d15bd6 R12: 1ffff11005afe093
R13: 0000000000000021 R14: dffffc0000000000 R15: 0000000000000000
 spin_unlock_irq include/linux/spinlock.h:401 [inline]
 get_signal+0x11f5/0x13f0 kernel/signal.c:2905
 arch_do_signal_or_restart+0xc2/0x800 arch/x86/kernel/signal.c:310
 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:291 [inline]
 syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
 do_syscall_64+0x61/0xa0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fa217c21019
Code: c0 79 93 eb d5 48 8d 7c 1d 00 eb 99 0f 1f 44 00 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 d0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa217c01218 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 00007fa217cd1b28 RCX: 00007fa217c21019
RDX: 000020000006b000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fa217cd1b20 R08: 35203a6b63617473 R09: 35203a6b63617473
R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000000140
R13: 000020000006b000 R14: 0000200000000100 R15: 0000200000000680
 </TASK>