------------[ cut here ]------------
faux_driver vkms: [drm] vblank wait timed out on crtc 0
WARNING: drivers/gpu/drm/drm_vblank.c:1318 at drm_wait_one_vblank+0x3b5/0x5d0 drivers/gpu/drm/drm_vblank.c:1318, CPU#1: kworker/1:1/48
Modules linked in:
CPU: 1 UID: 0 PID: 48 Comm: kworker/1:1 Tainted: G             L      syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
Workqueue: events drm_fb_helper_damage_work
RIP: 0010:drm_wait_one_vblank+0x5a2/0x5d0 drivers/gpu/drm/drm_vblank.c:1318
Code: 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 08 4c 89 ef e8 df 2b dc fc 4d 8b 7d 00 48 89 df 4c 89 e6 4c 89 fa 8b 4c 24 04 <67> 48 0f b9 3a e9 e3 fc ff ff 44 89 f9 80 e1 07 80 c1 03 38 c1 0f
RSP: 0000:ffffc90000ba78e0 EFLAGS: 00010246
RAX: 1ffff110048a3400 RBX: ffffffff8f53c700 RCX: 0000000000000000
RDX: ffffffff8b9ee600 RSI: ffffffff8ba0a360 RDI: ffffffff8f53c700
RBP: ffffc90000ba79c8 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1e91f6f R12: ffffffff8ba0a360
R13: ffff88802451a000 R14: 1ffff92000174f20 R15: ffffffff8b9ee600
FS:  0000000000000000(0000) GS:ffff88812669c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4e71675ff8 CR3: 00000000342b0000 CR4: 00000000003526f0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 drm_client_modeset_wait_for_vblank+0xc5/0xf0 drivers/gpu/drm/drm_client_modeset.c:1330
 drm_fb_helper_fb_dirty drivers/gpu/drm/drm_fb_helper.c:334 [inline]
 drm_fb_helper_damage_work+0x131/0x6f0 drivers/gpu/drm/drm_fb_helper.c:372
 process_one_work kernel/workqueue.c:3257 [inline]
 process_scheduled_works+0xaec/0x17a0 kernel/workqueue.c:3340
 worker_thread+0xda6/0x1360 kernel/workqueue.c:3421
 kthread+0x388/0x470 kernel/kthread.c:467
 ret_from_fork+0x51e/0xb90 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:	03 48 b9             	add    -0x47(%rax),%ecx
   3:	00 00                	add    %al,(%rax)
   5:	00 00                	add    %al,(%rax)
   7:	00 fc                	add    %bh,%ah
   9:	ff                   	lcall  (bad)
   a:	df 80 3c 08 00 74    	filds  0x7400083c(%rax)
  10:	08 4c 89 ef          	or     %cl,-0x11(%rcx,%rcx,4)
  14:	e8 df 2b dc fc       	call   0xfcdc2bf8
  19:	4d 8b 7d 00          	mov    0x0(%r13),%r15
  1d:	48 89 df             	mov    %rbx,%rdi
  20:	4c 89 e6             	mov    %r12,%rsi
  23:	4c 89 fa             	mov    %r15,%rdx
  26:	8b 4c 24 04          	mov    0x4(%rsp),%ecx
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	e9 e3 fc ff ff       	jmp    0xfffffd17
  34:	44 89 f9             	mov    %r15d,%ecx
  37:	80 e1 07             	and    $0x7,%cl
  3a:	80 c1 03             	add    $0x3,%cl
  3d:	38 c1                	cmp    %al,%cl
  3f:	0f                   	.byte 0xf