------------[ cut here ]------------
faux_driver vkms: [drm] vblank wait timed out on crtc 0
WARNING: drivers/gpu/drm/drm_vblank.c:1329 at drm_crtc_wait_one_vblank+0x3bc/0x560 drivers/gpu/drm/drm_vblank.c:1329, CPU#1: kworker/1:2/823
Modules linked in:
CPU: 1 UID: 0 PID: 823 Comm: kworker/1:2 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Workqueue: events drm_fb_helper_damage_work
RIP: 0010:drm_crtc_wait_one_vblank+0x51a/0x560 drivers/gpu/drm/drm_vblank.c:1329
Code: c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 08 4c 89 ef e8 05 eb b4 fc 4d 8b 7d 00 4c 89 f7 4c 89 e6 4c 89 fa 89 d9 <67> 48 0f b9 3a 48 8b 3c 24 89 de e8 36 f4 ff ff b8 92 ff ff ff 49
RSP: 0018:ffffc90006047940 EFLAGS: 00010246
RAX: 1ffff11004d05000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffffffff8be26280 RSI: ffffffff8be44020 RDI: ffffffff8fba8180
RBP: ffffc90006047a28 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1f5e7e0 R12: ffffffff8be44020
R13: ffff888026828000 R14: ffffffff8fba8180 R15: ffffffff8be26280
FS:  0000000000000000(0000) GS:ffff888125d4d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fea55c7da08 CR3: 0000000043edc000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 drm_client_modeset_wait_for_vblank+0xc5/0xf0 drivers/gpu/drm/drm_client_modeset.c:1331
 drm_fb_helper_fb_dirty drivers/gpu/drm/drm_fb_helper.c:237 [inline]
 drm_fb_helper_damage_work+0x125/0x700 drivers/gpu/drm/drm_fb_helper.c:275
 process_one_work+0xaaf/0x1480 kernel/workqueue.c:3379
 process_scheduled_works kernel/workqueue.c:3462 [inline]
 worker_thread+0xb05/0x10d0 kernel/workqueue.c:3543
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
----------------
Code disassembly (best guess):
   0:	c1 e8 03             	shr    $0x3,%eax
   3:	48 b9 00 00 00 00 00 	movabs $0xdffffc0000000000,%rcx
   a:	fc ff df
   d:	80 3c 08 00          	cmpb   $0x0,(%rax,%rcx,1)
  11:	74 08                	je     0x1b
  13:	4c 89 ef             	mov    %r13,%rdi
  16:	e8 05 eb b4 fc       	call   0xfcb4eb20
  1b:	4d 8b 7d 00          	mov    0x0(%r13),%r15
  1f:	4c 89 f7             	mov    %r14,%rdi
  22:	4c 89 e6             	mov    %r12,%rsi
  25:	4c 89 fa             	mov    %r15,%rdx
  28:	89 d9                	mov    %ebx,%ecx
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	48 8b 3c 24          	mov    (%rsp),%rdi
  33:	89 de                	mov    %ebx,%esi
  35:	e8 36 f4 ff ff       	call   0xfffff470
  3a:	b8 92 ff ff ff       	mov    $0xffffff92,%eax
  3f:	49                   	rex.WB