rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (1 ticks this GP) idle=fa64/1/0x4000000000000000 softirq=39649/39649 fqs=0
rcu: 	(detected by 0, t=10502 jiffies, g=33833, q=115 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 10768 Comm: syz.0.1292 Not tainted 6.14.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:__lock_acquire+0xec0/0x3c40 kernel/locking/lockdep.c:5261
Code: 00 00 48 8b 84 24 e8 00 00 00 65 48 2b 04 25 28 00 00 00 0f 85 93 22 00 00 48 81 c4 f0 00 00 00 89 d0 5b 5d 41 5c 41 5d 41 5e <41> 5f c3 cc cc cc cc 41 83 fe 01 c7 04 24 00 00 00 00 0f 87 4c f2
RSP: 0018:ffffc90000a28bc8 EFLAGS: 00000086
RAX: 0000000000000001 RBX: 1ffff92000145181 RCX: ffffffff8195c64e
RDX: 0000000000000001 RSI: 0000000000000001 RDI: ffffffff9425acb8
RBP: 0000000000000000 R08: 0000000000000000 R09: fffffbfff2dd8d98
R10: ffffffff96ec6cc7 R11: 0000000000000001 R12: 0000000000000000
R13: ffffffff9aad17d0 R14: 0000000000000000 R15: ffff888036bfd398
FS:  000055555b5eb500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2fce0000 CR3: 0000000027af4000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5851
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
 debug_object_activate+0x149/0x4a0 lib/debugobjects.c:818
 debug_hrtimer_activate kernel/time/hrtimer.c:455 [inline]
 debug_activate kernel/time/hrtimer.c:496 [inline]
 enqueue_hrtimer+0x25/0x3c0 kernel/time/hrtimer.c:1100
 __run_hrtimer kernel/time/hrtimer.c:1818 [inline]
 __hrtimer_run_queues+0x903/0xae0 kernel/time/hrtimer.c:1865
 hrtimer_interrupt+0x392/0x8e0 kernel/time/hrtimer.c:1927
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x10f/0x400 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x31/0x80 kernel/locking/spinlock.c:194
Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 86 9a 3c f6 48 89 df e8 de 19 3d f6 f7 c5 00 02 00 00 75 23 9c 58 f6 c4 02 75 37 <bf> 01 00 00 00 e8 45 f1 2d f6 65 8b 05 06 c3 a9 74 85 c0 74 16 5b
RSP: 0018:ffffc90004e37bb0 EFLAGS: 00000246
RAX: 0000000000000002 RBX: ffff8880b872c680 RCX: 1ffffffff20c4511
RDX: 0000000000000000 RSI: ffffffff8b6cfbe0 RDI: ffffffff8bd36960
RBP: 0000000000000246 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff90626c17 R11: 0000000000000001 R12: 0000000000000001
R13: ffffc90004e37d78 R14: 0000000000000000 R15: ffff8880b872c700
 unlock_hrtimer_base kernel/time/hrtimer.c:1032 [inline]
 hrtimer_start_range_ns+0x4db/0xfe0 kernel/time/hrtimer.c:1346
 hrtimer_start_expires include/linux/hrtimer.h:274 [inline]
 hrtimer_sleeper_start_expires kernel/time/hrtimer.c:2063 [inline]
 do_nanosleep+0x1f3/0x510 kernel/time/hrtimer.c:2138
 hrtimer_nanosleep+0x158/0x380 kernel/time/hrtimer.c:2188
 common_nsleep+0xa1/0xd0 kernel/time/posix-timers.c:1356
 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1402 [inline]
 __se_sys_clock_nanosleep kernel/time/posix-timers.c:1379 [inline]
 __x64_sys_clock_nanosleep+0x344/0x4a0 kernel/time/posix-timers.c:1379
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f25201bfa25
Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 f6 54 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 4f 55 ff ff 48 8b 04 24 48 83 c4 28 f7 d8
RSP: 002b:00007fff02eab170 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: ffffffffffffffda RBX: 00007f25203a5fa0 RCX: 00007f25201bfa25
RDX: 00007fff02eab1b0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f25203a7ba0 R08: 0000000000000000 R09: 00007f2520fbf000
R10: 0000000000000000 R11: 0000000000000293 R12: 000000000006a3f4
R13: 00007f25203a6080 R14: ffffffffffffffff R15: 00007fff02eab2f0
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g33833 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=22470
rcu: rcu_preempt kthread starved for 10502 jiffies! g33833 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:27552 pid:18    tgid:18    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5378 [inline]
 __schedule+0xf43/0x5890 kernel/sched/core.c:6765
 __schedule_loop kernel/sched/core.c:6842 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6857
 schedule_timeout+0x124/0x280 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2024
 rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2226
 kthread+0x3af/0x750 kernel/kthread.c:464
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
vkms_vblank_simulate: vblank timer overrun