------------[ cut here ]------------ WARNING: CPU: 1 PID: 5726 at drivers/gpu/drm/vkms/vkms_crtc.c:103 vkms_get_vblank_timestamp+0x1d2/0x210 drivers/gpu/drm/vkms/vkms_crtc.c:103 Modules linked in: CPU: 1 PID: 5726 Comm: syz-executor.5 Not tainted 6.8.0-rc3-syzkaller-g547ab8fc4cb0-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 RIP: 0010:vkms_get_vblank_timestamp+0x1d2/0x210 drivers/gpu/drm/vkms/vkms_crtc.c:103 Code: 00 74 08 48 89 ef e8 4d ea 2a fc 48 89 5d 00 b0 01 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d e9 54 73 a5 05 e8 ef 12 c9 fb 90 <0f> 0b 90 eb e0 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 74 fe ff ff 48 RSP: 0018:ffffc900093775c0 EFLAGS: 00010093 RAX: ffffffff85ca4351 RBX: 0000001c719ce79f RCX: ffff88801ab58000 RDX: 0000000000000000 RSI: 0000001c719ce79f RDI: 0000001c719ce79f RBP: ffffc90009377690 R08: ffffffff85ca42b9 R09: fffff5200126eec0 R10: dffffc0000000000 R11: ffffffff85ca4180 R12: 0000001c719ce79f R13: 1ffff9200126eed2 R14: 0000000000000000 R15: ffff88801f6b8000 FS: 0000555555de6480(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8f0a405f78 CR3: 000000002da42000 CR4: 0000000000350ef0 Call Trace: drm_crtc_get_last_vbltimestamp drivers/gpu/drm/drm_vblank.c:867 [inline] drm_get_last_vbltimestamp drivers/gpu/drm/drm_vblank.c:886 [inline] drm_update_vblank_count+0x25c/0x9c0 drivers/gpu/drm/drm_vblank.c:298 drm_vblank_disable_and_save+0xee/0x3b0 drivers/gpu/drm/drm_vblank.c:467 drm_crtc_vblank_off+0x34a/0x990 drivers/gpu/drm/drm_vblank.c:1351 disable_outputs drivers/gpu/drm/drm_atomic_helper.c:1213 [inline] drm_atomic_helper_commit_modeset_disables+0xd01/0x1a10 drivers/gpu/drm/drm_atomic_helper.c:1417 vkms_atomic_commit_tail+0x50/0x200 drivers/gpu/drm/vkms/vkms_drv.c:71 commit_tail+0x2ab/0x3c0 drivers/gpu/drm/drm_atomic_helper.c:1832 drm_atomic_helper_commit+0x953/0x9f0 drivers/gpu/drm/drm_atomic_helper.c:2072 drm_atomic_commit+0x27f/0x2d0 drivers/gpu/drm/drm_atomic.c:1514 drm_client_modeset_commit_atomic+0x676/0x7e0 drivers/gpu/drm/drm_client_modeset.c:1051 drm_client_modeset_commit_locked+0xe0/0x520 drivers/gpu/drm/drm_client_modeset.c:1154 drm_client_modeset_commit+0x4a/0x70 drivers/gpu/drm/drm_client_modeset.c:1180 __drm_fb_helper_restore_fbdev_mode_unlocked drivers/gpu/drm/drm_fb_helper.c:251 [inline] drm_fb_helper_restore_fbdev_mode_unlocked drivers/gpu/drm/drm_fb_helper.c:278 [inline] drm_fb_helper_lastclose+0xbb/0x180 drivers/gpu/drm/drm_fb_helper.c:2005 drm_fbdev_generic_client_restore+0x34/0x40 drivers/gpu/drm/drm_fbdev_generic.c:258 drm_client_dev_restore+0x134/0x270 drivers/gpu/drm/drm_client.c:247 drm_lastclose drivers/gpu/drm/drm_file.c:406 [inline] drm_release+0x47c/0x560 drivers/gpu/drm/drm_file.c:437 __fput+0x42b/0x8a0 fs/file_table.c:376 __do_sys_close fs/open.c:1554 [inline] __se_sys_close fs/open.c:1539 [inline] __x64_sys_close+0x7e/0x110 fs/open.c:1539 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7f34f067cc9a Code: 48 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c 24 0c e8 03 7f 02 00 8b 7c 24 0c 89 c2 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 36 89 d7 89 44 24 0c e8 63 7f 02 00 8b 44 24 RSP: 002b:00007fffaffe38c0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007f34f067cc9a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00007f34f07ad980 R08: 0000001b2f560000 R09: 00007fffafff50b0 R10: 0000000000000000 R11: 0000000000000293 R12: 000000000001dfe8 R13: ffffffffffffffff R14: 00007f34f0200000 R15: 000000000001dca7