------------[ cut here ]------------
faux_driver vkms: [drm] vb
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+0x410/0x440 drivers/gpu/drm/drm_vblank.c:1331, CPU#0: kworker/0:5/4931
Modules linked in:
CPU: 0 UID: 0 PID: 4931 Comm: kworker/0:5 Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026
Workqueue: events drm_fb_helper_damage_work
pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : drm_crtc_wait_one_vblank+0x410/0x440 drivers/gpu/drm/drm_vblank.c:1331
lr : drm_crtc_wait_one_vblank+0x408/0x440 drivers/gpu/drm/drm_vblank.c:1329
sp : ffff800099ea7820
x29: ffff800099ea78d0 x28: dfff800000000000 x27: ffff0000c7aa2080
x26: ffff800099ea7820 x25: dfff800000000000 x24: ffff7000133d4f04
x23: ffff800086f58200 x22: ffff0000c7b48000 x21: ffff800086fddb60
x20: ffff0000c7b64000 x19: 0000000000000000 x18: 1fffe00034bb7428
x17: 0000000000000003 x16: ffff800088b37000 x15: ffff800088bed220
x14: ffff0001a5dba14c x13: 0000000000000001 x12: 0000000000000000
x11: ffff80008a5d5e28 x10: 0000000000000003 x9 : 1e87992e9ba8e900
x8 : 1e87992e9ba8e900 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff80008015611c
x2 : 0000000000000006 x1 : 0000000000000000 x0 : ffff0000c7b64000
Call trace:
 drm_crtc_wait_one_vblank+0x410/0x440 drivers/gpu/drm/drm_vblank.c:1331 (P)
 drm_client_modeset_wait_for_vblank+0xc4/0xec drivers/gpu/drm/drm_client_modeset.c:1331
 drm_fb_helper_fb_dirty drivers/gpu/drm/drm_fb_helper.c:327 [inline]
 drm_fb_helper_damage_work+0x520/0xbc0 drivers/gpu/drm/drm_fb_helper.c:365
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838
irq event stamp: 47050
hardirqs last  enabled at (47049): [<ffff8000803b7068>] raw_spin_rq_unlock_irq kernel/sched/sched.h:1673 [inline]
hardirqs last  enabled at (47049): [<ffff8000803b7068>] finish_lock_switch kernel/sched/core.c:5241 [inline]
hardirqs last  enabled at (47049): [<ffff8000803b7068>] finish_task_switch+0x234/0x858 kernel/sched/core.c:5359
hardirqs last disabled at (47050): [<ffff80008690cc28>] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445
softirqs last  enabled at (46996): [<ffff80008030e6e4>] softirq_handle_end kernel/softirq.c:468 [inline]
softirqs last  enabled at (46996): [<ffff80008030e6e4>] handle_softirqs+0xc28/0xd98 kernel/softirq.c:650
softirqs last disabled at (46977): [<ffff8000800204c0>] __do_softirq+0x14/0x20 kernel/softirq.c:656
---[ end trace 0000000000000000 ]---