------------[ 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+0x1b4/0x238 drivers/gpu/drm/drm_vblank.c:1329, CPU#0: kworker/0:2/13206
Modules linked in:
CPU: 0 UID: 0 PID: 13206 Comm: kworker/0:2 Tainted: G             L      syzkaller #0 PREEMPT 
Tainted: [L]=SOFTLOCKUP
Hardware name: linux,dummy-virt (DT)
Workqueue: events drm_fb_helper_damage_work
pstate: 61402009 (nZCv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--)
pc : drm_crtc_wait_one_vblank+0x1b4/0x238 drivers/gpu/drm/drm_vblank.c:1329
lr : drm_crtc_wait_one_vblank+0x1b4/0x238 drivers/gpu/drm/drm_vblank.c:1329
sp : ffff80008546bc30
x29: ffff80008546bc60 x28: 0000000000000000 x27: 0000000000000000
x26: fcf0000005b5f800 x25: ffff80008546bc30 x24: f7f0000005cf1888
x23: 0000000000000000 x22: 000000000006c475 x21: 0000000000000000
x20: 0000000000000000 x19: fcf0000005b5f800 x18: 00000000ffffffff
x17: 0000000000000000 x16: 0000000000000000 x15: ffff800083898d6e
x14: 00000000ffffffea x13: ffff80008546b888 x12: 00000000000affa8
x11: ffff800083639438 x10: 000000000002ffe8 x9 : ffff8000836e9438
x8 : ffff800083719420 x7 : 0000000000000001 x6 : ffffffffffffdfff
x5 : fff000007f8b6188 x4 : 0000000000000000 x3 : fff07ffffc2d5000
x2 : 0000000000000000 x1 : 0000000000000000 x0 : f8f0000006ca8000
Call trace:
 drm_crtc_wait_one_vblank+0x1b4/0x238 drivers/gpu/drm/drm_vblank.c:1329 (P)
 drm_client_modeset_wait_for_vblank+0x70/0x84 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+0x178/0x39c drivers/gpu/drm/drm_fb_helper.c:365
 process_one_work+0x1ac/0x320 kernel/workqueue.c:3396
 process_scheduled_works kernel/workqueue.c:3479 [inline]
 worker_thread+0x184/0x2f4 kernel/workqueue.c:3560
 kthread+0x118/0x124 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:854
---[ 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+0x1b4/0x238 drivers/gpu/drm/drm_vblank.c:1329, CPU#0: kworker/0:2/13206
Modules linked in:
CPU: 0 UID: 0 PID: 13206 Comm: kworker/0:2 Tainted: G        W    L      syzkaller #0 PREEMPT 
Tainted: [W]=WARN, [L]=SOFTLOCKUP
Hardware name: linux,dummy-virt (DT)
Workqueue: events drm_fb_helper_damage_work
pstate: 60402009 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : drm_crtc_wait_one_vblank+0x1b4/0x238 drivers/gpu/drm/drm_vblank.c:1329
lr : drm_crtc_wait_one_vblank+0x1b4/0x238 drivers/gpu/drm/drm_vblank.c:1329
sp : ffff80008546bc30
x29: ffff80008546bc60 x28: 0000000000000000 x27: 0000000000000000
x26: fcf0000005b5f800 x25: ffff80008546bc30 x24: f7f0000005cf1888
x23: 0000000000000000 x22: 000000000006c475 x21: 0000000000000000
x20: 0000000000000000 x19: fcf0000005b5f800 x18: 00000000ffffffff
x17: fff07ffffc2d5000 x16: ffff8000839a8000 x15: ffff8000838994f6
x14: 00000000ffffffea x13: ffff80008546b888 x12: 00000000000affa8
x11: ffff800083639438 x10: 000000000002ffe8 x9 : ffff8000836e9438
x8 : ffff800083719420 x7 : 0000000000000001 x6 : ffffffffffffdfff
x5 : fff000007f8b6188 x4 : 0000000000000000 x3 : fff07ffffc2d5000
x2 : 0000000000000000 x1 : 0000000000000000 x0 : f8f0000006ca8000
Call trace:
 drm_crtc_wait_one_vblank+0x1b4/0x238 drivers/gpu/drm/drm_vblank.c:1329 (P)
 drm_client_modeset_wait_for_vblank+0x70/0x84 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+0x178/0x39c drivers/gpu/drm/drm_fb_helper.c:365
 process_one_work+0x1ac/0x320 kernel/workqueue.c:3396
 process_scheduled_works kernel/workqueue.c:3479 [inline]
 worker_thread+0x184/0x2f4 kernel/workqueue.c:3560
 kthread+0x118/0x124 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:854
---[ end trace 0000000000000000 ]---