------------[ cut here ]------------ faux_driver vkms: [drm] vblank wait timed out on crtc 0 WARNING: drivers/gpu/drm/drm_vblank.c:1308 at drm_wait_one_vblank+0x571/0x5b0 drivers/gpu/drm/drm_vblank.c:1308, CPU#0: syz.8.2600/15349 Modules linked in: CPU: 0 UID: 0 PID: 15349 Comm: syz.8.2600 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 RIP: 0010:drm_wait_one_vblank+0x571/0x5b0 drivers/gpu/drm/drm_vblank.c:1308 Code: ff df 80 3c 08 00 74 08 4c 89 e7 e8 39 81 af fc 4d 8b 2c 24 48 c7 c7 a0 01 16 8c 4c 89 fe 4c 89 ea 44 89 f1 e8 80 56 0e 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:ffffc9000fc77ac0 EFLAGS: 00010246 RAX: 986b594f031dd700 RBX: 1ffff11028571801 RCX: 0000000000080000 RDX: ffffc9000ea02000 RSI: 0000000000067795 RDI: 0000000000067796 RBP: ffffc9000fc77bc0 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffffbfff1c3a648 R12: ffff888025081000 R13: ffffffff8c28a200 R14: 0000000000000000 R15: ffffffff8c2a3c40 FS: 00007f94a167c6c0(0000) GS:ffff8881259e7000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30f14ff8 CR3: 000000005c41a000 CR4: 00000000003526f0 Call Trace: drm_fb_helper_ioctl+0x116/0x140 drivers/gpu/drm/drm_fb_helper.c:1108 do_fb_ioctl+0x45c/0x750 drivers/video/fbdev/core/fb_chrdev.c:155 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f94a078eec9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f94a167c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f94a09e6180 RCX: 00007f94a078eec9 RDX: 0000000000000000 RSI: 0000000040044620 RDI: 0000000000000009 RBP: 00007f94a0811f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f94a09e6218 R14: 00007f94a09e6180 R15: 00007ffdc4b09da8