------------[ cut here ]------------
WARNING: CPU: 1 PID: 7613 at drivers/gpu/drm/vkms/vkms_crtc.c:98 vkms_get_vblank_timestamp+0x185/0x1e0 drivers/gpu/drm/vkms/vkms_crtc.c:98
Modules linked in:
CPU: 1 UID: 0 PID: 7613 Comm: syz.2.416 Not tainted 6.13.0-rc6-syzkaller-00262-gb62cef9a5c67 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:vkms_get_vblank_timestamp+0x185/0x1e0 drivers/gpu/drm/vkms/vkms_crtc.c:98
Code: da fb e8 1e 83 c8 fb 48 89 e9 48 ba 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 11 00 75 50 48 89 45 00 eb c0 e8 dc b9 da fb 90 <0f> 0b 90 eb b5 e8 51 5c 3d fc e9 dc fe ff ff 48 89 df e8 d4 5c 3d
RSP: 0018:ffffc900100e7700 EFLAGS: 00010283
RAX: 000000000000277f RBX: 00000031442edb88 RCX: ffffc90010139000
RDX: 0000000000080000 RSI: ffffffff85bf5a84 RDI: 0000000000000006
RBP: ffffc900100e7868 R08: 0000000000000006 R09: 00000031442edb88
R10: 00000031442edb88 R11: 0000000000000000 R12: 00000031442edb88
R13: ffff888025120000 R14: 0000000000004e20 R15: ffffffff85bf5900
FS:  00007f07bcdb46c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f07bef69ae0 CR3: 000000007dd08000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 drm_crtc_get_last_vbltimestamp+0x103/0x1b0 drivers/gpu/drm/drm_vblank.c:878
 drm_crtc_next_vblank_start+0x182/0x300 drivers/gpu/drm/drm_vblank.c:1012
 set_fence_deadline drivers/gpu/drm/drm_atomic_helper.c:1558 [inline]
 drm_atomic_helper_wait_for_fences+0x1fc/0x820 drivers/gpu/drm/drm_atomic_helper.c:1605
 drm_atomic_helper_commit+0x1cf/0x380 drivers/gpu/drm/drm_atomic_helper.c:2034
 drm_atomic_commit+0x232/0x300 drivers/gpu/drm/drm_atomic.c:1518
 set_property_atomic+0x172/0x380 drivers/gpu/drm/drm_mode_object.c:546
 drm_mode_obj_set_property_ioctl+0x411/0x5c0 drivers/gpu/drm/drm_mode_object.c:586
 drm_connector_property_set_ioctl+0x103/0x170 drivers/gpu/drm/drm_connector.c:3094
 drm_ioctl_kernel+0x1e6/0x3d0 drivers/gpu/drm/drm_ioctl.c:796
 drm_ioctl+0x5d6/0xc00 drivers/gpu/drm/drm_ioctl.c:893
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl fs/ioctl.c:892 [inline]
 __x64_sys_ioctl+0x190/0x200 fs/ioctl.c:892
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f07bef85d29
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:00007f07bcdb4038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f07bf176160 RCX: 00007f07bef85d29
RDX: 0000000020000240 RSI: 00000000c01064ab RDI: 0000000000000007
RBP: 00007f07bf001b08 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f07bf176160 R15: 00007ffd401b9c38
 </TASK>