------------[ cut here ]------------
WARNING: drivers/gpu/drm/drm_vblank.c:1329 at drm_crtc_wait_one_vblank+0x19c/0x21c drivers/gpu/drm/drm_vblank.c:1329, CPU#1: kworker/1:3/3054
faux_driver vkms: [drm] vblank wait timed out on crtc 0
Modules linked in:
Kernel panic - not syncing: kernel: panic_on_warn set ...
CPU: 1 UID: 0 PID: 3054 Comm: kworker/1:3 Not tainted syzkaller #0 PREEMPT 
Hardware name: ARM-Versatile Express
Workqueue: events drm_fb_helper_damage_work
Call trace: 
[<80201a08>] (dump_backtrace) from [<80201afc>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:257)
 r7:8321c4bc r6:00000000 r5:82328334 r4:00000001
[<80201ae4>] (show_stack) from [<8021e804>] (__dump_stack lib/dump_stack.c:94 [inline])
[<80201ae4>] (show_stack) from [<8021e804>] (dump_stack_lvl+0x5c/0x70 lib/dump_stack.c:120)
[<8021e7a8>] (dump_stack_lvl) from [<8021e830>] (dump_stack+0x18/0x1c lib/dump_stack.c:129)
 r7:8321c4bc r6:00000000 r5:85eab200 r4:83483d7c
[<8021e818>] (dump_stack) from [<802026b8>] (vpanic+0x114/0x320 kernel/panic.c:651)
[<802025a4>] (vpanic) from [<802028f8>] (trace_suspend_resume+0x0/0x100 kernel/panic.c:788)
 r7:80ba8250
[<802028c4>] (panic) from [<80251bdc>] (check_panic_on_warn kernel/panic.c:525 [inline])
[<802028c4>] (panic) from [<80251bdc>] (get_taint+0x0/0x1c kernel/panic.c:520)
 r3:8320b188 r2:00000001 r1:8230dea4 r0:82315828
[<80251b64>] (check_panic_on_warn) from [<80251d58>] (__warn+0x98/0x1a4 kernel/panic.c:1104)
[<80251cc0>] (__warn) from [<8025204c>] (warn_slowpath_fmt+0x1e8/0x1f4 kernel/panic.c:1144)
 r8:00000009 r7:823aebac r6:ebc4ddb4 r5:85eab200 r4:00000000
[<80251e68>] (warn_slowpath_fmt) from [<80ba8250>] (drm_crtc_wait_one_vblank+0x19c/0x21c drivers/gpu/drm/drm_vblank.c:1329)
 r10:84a04644 r9:ffffff92 r8:00000000 r7:0000c1a4 r6:00000000 r5:00000000
 r4:84802800
[<80ba80b4>] (drm_crtc_wait_one_vblank) from [<80babe0c>] (drm_client_modeset_wait_for_vblank+0x60/0x74 drivers/gpu/drm/drm_client_modeset.c:1331)
 r10:84802450 r9:848028c4 r8:84802988 r7:00000000 r6:84802800 r5:00000000
 r4:83b42040
[<80babdac>] (drm_client_modeset_wait_for_vblank) from [<80bc74b0>] (drm_fb_helper_fb_dirty drivers/gpu/drm/drm_fb_helper.c:327 [inline])
[<80babdac>] (drm_client_modeset_wait_for_vblank) from [<80bc74b0>] (drm_fb_helper_damage_work+0x190/0x3d4 drivers/gpu/drm/drm_fb_helper.c:365)
 r7:00000000 r6:8403e7b4 r5:8403e794 r4:8403e700
[<80bc7320>] (drm_fb_helper_damage_work) from [<802771a8>] (process_one_work+0x1f8/0x5cc kernel/workqueue.c:3396)
 r10:8382ae05 r9:01800000 r8:85eab200 r7:ddde5180 r6:8382ae00 r5:8403e794
 r4:86029a00
[<80276fb0>] (process_one_work) from [<80277ed0>] (process_scheduled_works kernel/workqueue.c:3479 [inline])
[<80276fb0>] (process_one_work) from [<80277ed0>] (worker_thread+0x16c/0x318 kernel/workqueue.c:3560)
 r10:ddde5180 r9:86029a30 r8:85eab200 r7:83203d80 r6:ddde51a0 r5:ddde5180
 r4:86029a00
[<80277d64>] (worker_thread) from [<80282918>] (kthread+0x11c/0x154 kernel/kthread.c:436)
 r10:00000000 r9:df879e88 r8:85d40b00 r7:86029a00 r6:80277d64 r5:85eab200
 r4:85855900
[<802827fc>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137)
Exception stack(0xebc4dfb0 to 0xebc4dff8)
dfa0:                                     00000000 00000000 00000000 00000000
dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
dfe0: 00000000 00000000 00000000 00000000 00000013 00000000
 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:802827fc r4:85855900
SMP: failed to stop secondary CPUs
Rebooting in 86400 seconds..