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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: syz.2.317/7076
Modules linked in:
CPU: 1 UID: 0 PID: 7076 Comm: syz.2.317 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
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 0f b0 df 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: 0018:ffffc9000b21fae0 EFLAGS: 00010246
RAX: 1ffff110048cb600 RBX: ffffffff8f52a070 RCX: 0000000000000000
RDX: ffffffff8b9eb1e0 RSI: ffffffff8ba06f40 RDI: ffffffff8f52a070
RBP: ffffc9000b21fbc8 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1e8fcaf R12: ffffffff8ba06f40
R13: ffff88802465b000 R14: 1ffff92001643f60 R15: ffffffff8b9eb1e0
FS:  00007f75ed29d6c0(0000) GS:ffff8881266c9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c4323d0 CR3: 0000000031fd4000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 drm_client_modeset_wait_for_vblank+0xc5/0xf0 drivers/gpu/drm/drm_client_modeset.c:1330
 drm_fb_helper_ioctl+0x6f/0xc0 drivers/gpu/drm/drm_fb_helper.c:1038
 do_fb_ioctl+0x4cc/0x800 drivers/video/fbdev/core/fb_chrdev.c:155
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xff/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f75ef06aeb9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f75ed29d028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f75ef2e6090 RCX: 00007f75ef06aeb9
RDX: 0000000000000000 RSI: 0000000040044620 RDI: 0000000000000004
RBP: 00007f75ef0d8c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f75ef2e6128 R14: 00007f75ef2e6090 R15: 00007ffff234ef18
 </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 0f b0 df fc       	call   0xfcdfb028
  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