syzbot

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faux_driver vkms: [drm] vblank wait timed out on crtc 0
WARNING: CPU: 1 PID: 6146 at drivers/gpu/drm/drm_vblank.c:1308 drm_wait_one_vblank+0x571/0x5b0 drivers/gpu/drm/drm_vblank.c:1308
Modules linked in:
CPU: 1 UID: 0 PID: 6146 Comm: syz.1.40 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:drm_wait_one_vblank+0x571/0x5b0 drivers/gpu/drm/drm_vblank.c:1308
Code: ff df 80 3c 08 00 74 08 4c 89 e7 e8 79 ae be fc 4d 8b 2c 24 48 c7 c7 a0 9a 74 8b 4c 89 fe 4c 89 ea 44 89 f1 e8 90 47 24 fc 90 <0f> 0b 90 90 49 bd 00 00 00 00 00 fc ff df e9 a7 fc ff ff 44 89 f9
RSP: 0018:ffffc90003fffae0 EFLAGS: 00010246
RAX: dbc11375b0e5a300 RBX: 1ffff110048c9c01 RCX: ffff888026d35940
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003fffbe0 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed1017124863 R12: ffff888024650000
R13: ffffffff8b784a60 R14: 0000000000000000 R15: ffffffff8b79e680
FS:  00005555873ae500(0000) GS:ffff8881269c2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f25b3ed7dac CR3: 000000002836a000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 drm_fb_helper_ioctl+0x116/0x140 drivers/gpu/drm/drm_fb_helper.c:1108
 do_fb_ioctl+0x45c/0x750 drivers/video/fbdev/core/fb_chrdev.c:155
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:598 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:584
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff06e1aebe9
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffdf67e50b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ff06e3e5fa0 RCX: 00007ff06e1aebe9
RDX: 0000000000000000 RSI: 0000000040044620 RDI: 0000000000000003
RBP: 00007ff06e231e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff06e3e5fa0 R14: 00007ff06e3e5fa0 R15: 0000000000000003
 </TASK>