vkms_vblank_simulate: vblank timer overrun
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 0, t=10502 jiffies, g=65253, q=127)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4295000525-4294990023), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g65253 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:29312 pid:   14 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4986 [inline]
 __schedule+0xab2/0x4db0 kernel/sched/core.c:6295
 schedule+0xd2/0x260 kernel/sched/core.c:6368
 schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1881
 rcu_gp_fqs_loop+0x186/0x810 kernel/rcu/tree.c:1963
 rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2136
 kthread+0x2e9/0x3a0 kernel/kthread.c:377
 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: 13894 Comm: syz-executor.0 Not tainted 5.17.0-rc1-syzkaller-00186-g23a46422c561 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:debug_spin_lock_after kernel/locking/spinlock_debug.c:94 [inline]
RIP: 0010:do_raw_spin_lock+0x188/0x2b0 kernel/locking/spinlock_debug.c:117
Code: 38 d0 7c 08 84 d2 0f 85 d9 00 00 00 4c 89 ea 44 89 75 08 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 65 4c 8b 24 25 00 70 02 00 <80> 3c 02 00 0f 85 e4 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89
RSP: 0018:ffffc90000dc0d38 EFLAGS: 00000016
RAX: dffffc0000000000 RBX: 1ffff920001b81a8 RCX: ffffffff815db4a0
RDX: 1ffff1100f856c5f RSI: 0000000000000004 RDI: ffffc90000dc0d60
RBP: ffff88807c2b62e8 R08: 0000000000000001 R09: 0000000000000003
R10: fffff520001b81ac R11: 0000000000000001 R12: ffff888079dfba00
R13: ffff88807c2b62f8 R14: 0000000000000001 R15: ffffffff87656ea0
FS:  00007f9456bd6700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30027000 CR3: 000000007eb44000 CR4: 0000000000350ee0
Call Trace:
 <IRQ>
 spin_lock include/linux/spinlock.h:349 [inline]
 advance_sched+0x53/0x9a0 net/sched/sch_taprio.c:714
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x609/0xe50 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
 __sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103
 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
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: 0f 1f 44 00 00 55 48 8b 74 24 08 48 89 fd 48 83 c7 18 e8 6e 61 0c f8 48 89 ef e8 26 d7 0c f8 e8 11 c2 2d f8 fb bf 01 00 00 00 <e8> 66 8a ff f7 65 8b 05 1f 8f b1 76 85 c0 74 02 5d c3 e8 8b 64 af
RSP: 0018:ffffc90004607c90 EFLAGS: 00000202
RAX: 00000000000000b9 RBX: ffff888079dfba00 RCX: 1ffffffff1b29369
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffff88807d0a5340 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff817ea2d8 R11: 0000000000000000 R12: ffff888079dfba00
R13: dffffc0000000000 R14: ffffc90004607f58 R15: 0000000000000000
 spin_unlock_irq include/linux/spinlock.h:399 [inline]
 get_signal+0x3be/0x28c0 kernel/signal.c:2827
 arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:868
 handle_signal_work kernel/entry/common.c:148 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
 exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:207
 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
 syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f9458261059
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f9456bd6218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007f9458373f68 RCX: 00007f9458261059
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f9458373f6c
RBP: 00007f9458373f60 R08: 00007ffc2e8e3080 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 00007f9458373f6c
R13: 00007ffc2e8b8f6f R14: 00007f9456bd6300 R15: 0000000000022000
 </TASK>
vkms_vblank_simulate: vblank timer overrun
----------------
Code disassembly (best guess):
   0:	38 d0                	cmp    %dl,%al
   2:	7c 08                	jl     0xc
   4:	84 d2                	test   %dl,%dl
   6:	0f 85 d9 00 00 00    	jne    0xe5
   c:	4c 89 ea             	mov    %r13,%rdx
   f:	44 89 75 08          	mov    %r14d,0x8(%rbp)
  13:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  1a:	fc ff df
  1d:	48 c1 ea 03          	shr    $0x3,%rdx
  21:	65 4c 8b 24 25 00 70 	mov    %gs:0x27000,%r12
  28:	02 00
* 2a:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2e:	0f 85 e4 00 00 00    	jne    0x118
  34:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  3b:	fc ff df
  3e:	4c                   	rex.WR
  3f:	89                   	.byte 0x89