------------[ cut here ]------------ faux_driver vkms: [drm] vblank wait timed out on crtc 0 WARNING: drivers/gpu/drm/drm_vblank.c:1320 at drm_wait_one_vblank+0x570/0x5b0 drivers/gpu/drm/drm_vblank.c:1320, CPU#0: kworker/0:0/22537 Modules linked in: CPU: 0 UID: 0 PID: 22537 Comm: kworker/0:0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Workqueue: events drm_fb_helper_damage_work RIP: 0010:drm_wait_one_vblank+0x570/0x5b0 drivers/gpu/drm/drm_vblank.c:1320 Code: ff df 80 3c 08 00 74 08 4c 89 e7 e8 8a cf e7 fc 4d 8b 2c 24 48 c7 c7 60 35 d4 8b 4c 89 fe 4c 89 ea 44 89 f1 e8 11 2c 45 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:ffffc9000aea7840 EFLAGS: 00010246 RAX: d520f6236dfc3000 RBX: 1ffff1102847cc01 RCX: ffff88807a309e40 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002 RBP: ffffc9000aea7928 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffffbfff1bfa650 R12: ffff8880248c4000 R13: ffffffff8be6d8a0 R14: 0000000000000000 R15: ffffffff8be87a00 FS: 0000000000000000(0000) GS:ffff888125d22000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000000df38000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000002 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: drm_client_modeset_wait_for_vblank+0xc5/0xf0 drivers/gpu/drm/drm_client_modeset.c:1330 drm_fb_helper_fb_dirty drivers/gpu/drm/drm_fb_helper.c:372 [inline] drm_fb_helper_damage_work+0xce/0x6c0 drivers/gpu/drm/drm_fb_helper.c:407 process_one_work kernel/workqueue.c:3263 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245