------------[ cut here ]------------ WARNING: CPU: 0 PID: 12528 at drivers/gpu/drm/vkms/vkms_crtc.c:103 vkms_get_vblank_timestamp+0x1d8/0x250 drivers/gpu/drm/vkms/vkms_crtc.c:103 Modules linked in: CPU: 0 PID: 12528 Comm: syz-executor.5 Not tainted 6.7.0-rc5-syzkaller-00014-g26aff849438c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 RIP: 0010:vkms_get_vblank_timestamp+0x1d8/0x250 drivers/gpu/drm/vkms/vkms_crtc.c:103 Code: 1c fc e8 9b 04 0c fc 4c 89 e1 48 ba 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 11 00 75 67 49 89 04 24 eb c4 e8 89 a6 1c fc 90 <0f> 0b 90 eb b9 e8 2e 4d 73 fc e9 dc fe ff ff e8 64 4d 73 fc e9 6e RSP: 0018:ffffc900050df870 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 000000b0ca5a7f33 RCX: ffffffff856ae6ff RDX: ffff88802407bb80 RSI: ffffffff856ae777 RDI: 0000000000000006 RBP: ffff88801c560000 R08: 0000000000000006 R09: 000000b0ca5a7f33 R10: 000000b0ca5a7f33 R11: 0000000000000006 R12: ffffc900050df9d8 R13: 000000b0ca5a7f33 R14: 0000000000004e20 R15: ffffffff856ae5a0 FS: 0000555556fcc480(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe798d5ba60 CR3: 00000000797c4000 CR4: 0000000000350ef0 Call Trace: drm_crtc_get_last_vbltimestamp+0x103/0x1a0 drivers/gpu/drm/drm_vblank.c:877 drm_crtc_next_vblank_start+0x186/0x2f0 drivers/gpu/drm/drm_vblank.c:1012 set_fence_deadline drivers/gpu/drm/drm_atomic_helper.c:1555 [inline] drm_atomic_helper_wait_for_fences+0x1fc/0x840 drivers/gpu/drm/drm_atomic_helper.c:1602 commit_tail+0x83/0x410 drivers/gpu/drm/drm_atomic_helper.c:1816 drm_atomic_helper_commit+0x2f9/0x380 drivers/gpu/drm/drm_atomic_helper.c:2070 drm_atomic_commit+0x20b/0x2d0 drivers/gpu/drm/drm_atomic.c:1513 drm_client_modeset_commit_atomic+0x6c2/0x810 drivers/gpu/drm/drm_client_modeset.c:1051 drm_client_modeset_commit_locked+0x14d/0x580 drivers/gpu/drm/drm_client_modeset.c:1154 drm_client_modeset_commit+0x4f/0x80 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:230 [inline] drm_fb_helper_restore_fbdev_mode_unlocked drivers/gpu/drm/drm_fb_helper.c:278 [inline] drm_fb_helper_lastclose+0xc7/0x160 drivers/gpu/drm/drm_fb_helper.c:2005 drm_fbdev_generic_client_restore+0x2c/0x40 drivers/gpu/drm/drm_fbdev_generic.c:258 drm_client_dev_restore+0x188/0x290 drivers/gpu/drm/drm_client.c:257 drm_release+0x40e/0x4f0 drivers/gpu/drm/drm_file.c:497 __fput+0x270/0xbb0 fs/file_table.c:394 __fput_sync+0x47/0x50 fs/file_table.c:475 __do_sys_close fs/open.c:1590 [inline] __se_sys_close fs/open.c:1575 [inline] __x64_sys_close+0x87/0xf0 fs/open.c:1575 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f4dee07ba9a 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:00007ffc3306f1d0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f4dee07ba9a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000000032 R08: 0000001b32120000 R09: 0000000000000095 R10: 0000000081730fae R11: 0000000000000293 R12: 00007f4dedc005f0 R13: ffffffffffffffff R14: 00007f4dedc00000 R15: 00000000000b94c6