------------[ 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+0x410/0x440 drivers/gpu/drm/drm_vblank.c:1331, CPU#1: kworker/1:4/4805
Modules linked in:
CPU: 1 UID: 0 PID: 4805 Comm: kworker/1:4 Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
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 : ffff800097477820
x29: ffff8000974778d0 x28: dfff800000000000 x27: ffff0000c7c08080
x26: ffff800097477820 x25: dfff800000000000 x24: ffff700012e8ef04
x23: ffff800086f38400 x22: ffff0000c7a41000 x21: ffff800086fbdbe0
x20: ffff0000c79fa000 x19: 0000000000000000 x18: 1fffe00035bc9e28
x17: 0000000000000003 x16: ffff800088b07000 x15: ffff800088bbd0a0
x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000000
x11: 0000000000000000 x10: 0000000000000002 x9 : 438443122630d600
x8 : 438443122630d600 x7 : ffff80008048e080 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f8070
x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c79fa000
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:842
irq event stamp: 9726
hardirqs last  enabled at (9725): [<ffff8000868ea26c>] irqentry_exit_to_kernel_mode_after_preempt include/linux/irq-entry-common.h:507 [inline]
hardirqs last  enabled at (9725): [<ffff8000868ea26c>] arm64_exit_to_kernel_mode+0x80/0x94 arch/arm64/kernel/entry-common.c:62
hardirqs last disabled at (9726): [<ffff8000868e6198>] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:425
softirqs last  enabled at (9648): [<ffff800084c82190>] local_bh_enable include/linux/bottom_half.h:33 [inline]
softirqs last  enabled at (9648): [<ffff800084c82190>] rcu_read_unlock_bh include/linux/rcupdate.h:914 [inline]
softirqs last  enabled at (9648): [<ffff800084c82190>] __dev_queue_xmit+0x14cc/0x2bc0 net/core/dev.c:4913
softirqs last disabled at (9628): [<ffff800084c80ec0>] local_bh_disable include/linux/bottom_half.h:20 [inline]
softirqs last disabled at (9628): [<ffff800084c80ec0>] rcu_read_lock_bh include/linux/rcupdate.h:893 [inline]
softirqs last disabled at (9628): [<ffff800084c80ec0>] __dev_queue_xmit+0x1fc/0x2bc0 net/core/dev.c:4796
---[ end trace 0000000000000000 ]---
------------[ 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+0x410/0x440 drivers/gpu/drm/drm_vblank.c:1331, CPU#1: kworker/1:4/4805
Modules linked in:
CPU: 1 UID: 0 PID: 4805 Comm: kworker/1:4 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
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 : ffff800097477820
x29: ffff8000974778d0 x28: dfff800000000000 x27: ffff0000c7c08080
x26: ffff800097477820 x25: dfff800000000000 x24: ffff700012e8ef04
x23: ffff800086f38400 x22: ffff0000c7a41000 x21: ffff800086fbdbe0
x20: ffff0000c79fa000 x19: 0000000000000000 x18: 1fffe00035bc9e28
x17: 0000000000000003 x16: ffff800088b07000 x15: ffff800088bbd0a0
x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000000
x11: 0000000000000000 x10: 0000000000000002 x9 : 438443122630d600
x8 : 438443122630d600 x7 : ffff80008048e080 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f8070
x2 : 0000000100000000 x1 : 0000000000000000 x0 : ffff0000c79fa000
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:842
irq event stamp: 9808
hardirqs last  enabled at (9807): [<ffff8000868ea26c>] irqentry_exit_to_kernel_mode_after_preempt include/linux/irq-entry-common.h:507 [inline]
hardirqs last  enabled at (9807): [<ffff8000868ea26c>] arm64_exit_to_kernel_mode+0x80/0x94 arch/arm64/kernel/entry-common.c:62
hardirqs last disabled at (9808): [<ffff8000868e6198>] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:425
softirqs last  enabled at (9648): [<ffff800084c82190>] local_bh_enable include/linux/bottom_half.h:33 [inline]
softirqs last  enabled at (9648): [<ffff800084c82190>] rcu_read_unlock_bh include/linux/rcupdate.h:914 [inline]
softirqs last  enabled at (9648): [<ffff800084c82190>] __dev_queue_xmit+0x14cc/0x2bc0 net/core/dev.c:4913
softirqs last disabled at (9628): [<ffff800084c80ec0>] local_bh_disable include/linux/bottom_half.h:20 [inline]
softirqs last disabled at (9628): [<ffff800084c80ec0>] rcu_read_lock_bh include/linux/rcupdate.h:893 [inline]
softirqs last disabled at (9628): [<ffff800084c80ec0>] __dev_queue_xmit+0x1fc/0x2bc0 net/core/dev.c:4796
---[ end trace 0000000000000000 ]---