rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 1, t=10502 jiffies, g=8929, q=39 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4294956010-4294945507), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10504 jiffies! g8929 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
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:27496 pid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5381 [inline]
 __schedule+0x14e2/0x4580 kernel/sched/core.c:6700
 schedule+0xbd/0x170 kernel/sched/core.c:6774
 schedule_timeout+0x160/0x280 kernel/time/timer.c:2167
 rcu_gp_fqs_loop+0x302/0x1560 kernel/rcu/tree.c:1667
 rcu_gp_kthread+0x99/0x380 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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5798 Comm: syz-executor181 Not tainted 6.6.95-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:212
Code: 00 0f 0b 0f 1f 80 00 00 00 00 f3 0f 1e fa 53 48 89 fb e8 13 00 00 00 48 8b 3d fc 17 c4 0c 48 89 de 5b e9 43 de 57 00 cc cc cc <f3> 0f 1e fa 48 8b 04 24 65 48 8b 0d 90 23 7e 7e 65 8b 15 91 23 7e
RSP: 0018:ffffc90000007e60 EFLAGS: 00000046
RAX: ffffffff81791def RBX: ffff8880b8e28280 RCX: 0000000000010000
RDX: 0000000000000000 RSI: 0000002c16bc4c00 RDI: ffff8880b8e28280
RBP: 0000000000000000 R08: ffff8880b8e2b943 R09: 1ffff110171c5728
R10: dffffc0000000000 R11: ffffed10171c5729 R12: ffff8880b8e2b9a0
R13: 0000002c16bc4c00 R14: 0000002c16bc4c00 R15: ffff8880b8e2baa8
FS:  0000555558af73c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000140 CR3: 000000007ba87000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 clockevents_program_event+0x1b/0x310 kernel/time/clockevents.c:305
 hrtimer_interrupt+0x5a1/0x9c0 kernel/time/hrtimer.c:1894
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1077 [inline]
 __sysvec_apic_timer_interrupt+0xfb/0x3b0 arch/x86/kernel/apic/apic.c:1094
 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 fa 76 f7 f6 48 89 df e8 12 49 f8 f6 e8 ed f5 1b f7 fb bf 01 00 00 00 <e8> 52 60 eb f6 65 8b 05 63 b6 93 75 85 c0 74 02 5b c3 e8 40 98 90
RSP: 0018:ffffc9000475fc98 EFLAGS: 00000282
RAX: 4c794415f5bc4a00 RBX: ffff88802e092500 RCX: 4c794415f5bc4a00
RDX: dffffc0000000000 RSI: ffffffff8aaab2c0 RDI: 0000000000000001
RBP: ffff88802e092998 R08: ffffffff8e49ac2f R09: 1ffffffff1c93585
R10: dffffc0000000000 R11: fffffbfff1c93586 R12: 1ffff11005c12533
R13: 0000000000000021 R14: dffffc0000000000 R15: 0000000000000000
 spin_unlock_irq include/linux/spinlock.h:401 [inline]
 get_signal+0x11f5/0x1400 kernel/signal.c:2905
 arch_do_signal_or_restart+0x96/0x780 arch/x86/kernel/signal.c:310
 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:291 [inline]
 syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
 do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f082b7b38d9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 19 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffdb5cc4cf8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 00007f082b7b38d9
RDX: 00002000000003c0 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000000 R08: 00007f082b773990 R09: 00007f082b773990
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f082b81133c
R13: 00007f082b80b106 R14: 00007ffdb5cc4d30 R15: 0000000000000000
 </TASK>