rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 0, t=10502 jiffies, g=6921, q=44 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4294954885-4294944382), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10504 jiffies! g6921 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:27840 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5244 [inline]
 __schedule+0x10e9/0x40d0 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
CPU: 1 PID: 4274 Comm: syz-executor165 Not tainted 6.1.135-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:212
Code: 2e 0f 1f 84 00 00 00 00 00 90 53 48 89 fb e8 17 00 00 00 48 8b 3d 00 b9 7d 0c 48 89 de 5b e9 37 a5 50 00 00 00 cc cc 00 00 cc <48> 8b 04 24 65 48 8b 0d 94 ab 81 7e 65 8b 15 95 ab 81 7e 81 e2 00
RSP: 0018:ffffc900001e0e20 EFLAGS: 00000096
RAX: 1ffff110171e54be RBX: ffff8880b8f2a580 RCX: ffff88802f111dc0
RDX: 0000000000010000 RSI: 000000000000000f RDI: ffff8880b8f2a580
RBP: 000000000000000f R08: 0000000000000004 R09: 0000000000000003
R10: fffff5200003c180 R11: 1ffff9200003c180 R12: 7fffffffffffffff
R13: ffff8880b8f2a580 R14: dffffc0000000000 R15: 0000000000000000
FS:  000055557fe633c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8249d29be0 CR3: 000000002f54e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __hrtimer_get_next_event+0x22/0x630 kernel/time/hrtimer.c:561
 hrtimer_update_next_event kernel/time/hrtimer.c:603 [inline]
 hrtimer_interrupt+0x420/0x8d0 kernel/time/hrtimer.c:1820
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1107 [inline]
 __sysvec_apic_timer_interrupt+0x153/0x5a0 arch/x86/kernel/apic/apic.c:1124
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1118
 </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 4e 5b 4a f7 48 89 df e8 a6 20 4b f7 e8 b1 22 6e f7 fb bf 01 00 00 00 <e8> b6 9d 3e f7 65 8b 05 b7 72 e9 75 85 c0 74 02 5b c3 e8 04 84 e7
RSP: 0018:ffffc90003df7bb8 EFLAGS: 00000286
RAX: 01414285ab513e00 RBX: ffff888029390940 RCX: 01414285ab513e00
RDX: dffffc0000000000 RSI: ffffffff8a6bff00 RDI: 0000000000000001
RBP: ffff888029390dd8 R08: dffffc0000000000 R09: ffffed1005272129
R10: ffffed1005272129 R11: 1ffff11005272128 R12: 1ffff110052721bb
R13: 0000000000000021 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+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: 0033:0x7f8249d12289
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 1b 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:00007ffc430dba08 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 00007f8249d12289
RDX: 000020000006b000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 00007f8249cca990 R09: 00007f8249cca990
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8249d62178
R13: 00007f8249d68e3c R14: 00007ffc430dba40 R15: 0000000000000000
 </TASK>