------------[ cut here ]------------
WARNING: CPU: 0 PID: 7005 at drivers/gpu/drm/vkms/vkms_crtc.c:97 vkms_get_vblank_timestamp+0x167/0x1b0 drivers/gpu/drm/vkms/vkms_crtc.c:97
Modules linked in:
CPU: 0 UID: 0 PID: 7005 Comm: syz.1.276 Not tainted 6.15.0-rc6-syzkaller-00208-g3c21441eeffc #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:vkms_get_vblank_timestamp+0x167/0x1b0 drivers/gpu/drm/vkms/vkms_crtc.c:97
Code: c3 fb e8 2c 6e b1 fb 4c 89 e1 48 ba 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 11 00 75 43 49 89 04 24 eb c0 e8 4a a0 c3 fb 90 <0f> 0b 90 eb b5 e8 bf 1d 29 fc e9 dc fe ff ff e8 45 1e 29 fc e9 14
RSP: 0018:ffffc9001ceeef08 EFLAGS: 00010283
RAX: 0000000000005216 RBX: ffff888021f74028 RCX: ffffc9000ca0a000
RDX: 0000000000080000 RSI: ffffffff85f7a5f6 RDI: 0000000000000006
RBP: 00000066e8c0cdb6 R08: 0000000000000006 R09: 00000066e8c0cdb6
R10: 00000066e8c0cdb6 R11: 0000000000000000 R12: ffffc9001ceef070
R13: 00000066e8c0cdb6 R14: 0000000000004e20 R15: ffffffff85f7a490
FS:  00007f05b66306c0(0000) GS:ffff8881249df000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f05b660fd58 CR3: 000000003521b000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 drm_crtc_get_last_vbltimestamp+0x105/0x1b0 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:1596 [inline]
 drm_atomic_helper_wait_for_fences+0x203/0x830 drivers/gpu/drm/drm_atomic_helper.c:1643
 commit_tail+0x83/0x400 drivers/gpu/drm/drm_atomic_helper.c:1857
 drm_atomic_helper_commit+0x2fd/0x380 drivers/gpu/drm/drm_atomic_helper.c:2111
 drm_atomic_commit+0x231/0x300 drivers/gpu/drm/drm_atomic.c:1518
 drm_client_modeset_commit_atomic+0x69d/0x7e0 drivers/gpu/drm/drm_client_modeset.c:1079
 drm_client_modeset_commit_locked+0x14d/0x580 drivers/gpu/drm/drm_client_modeset.c:1182
 pan_display_atomic drivers/gpu/drm/drm_fb_helper.c:1387 [inline]
 drm_fb_helper_pan_display+0x32d/0xa40 drivers/gpu/drm/drm_fb_helper.c:1447
 fb_pan_display+0x47c/0x7d0 drivers/video/fbdev/core/fbmem.c:191
 fb_set_var+0x860/0x11f0 drivers/video/fbdev/core/fbmem.c:323
 fbcon_resize+0x684/0x910 drivers/video/fbdev/core/fbcon.c:2070
 resize_screen drivers/tty/vt/vt.c:1112 [inline]
 vc_do_resize+0xccb/0x10e0 drivers/tty/vt/vt.c:1169
 vt_resizex drivers/tty/vt/vt_ioctl.c:717 [inline]
 vt_ioctl+0x24ce/0x2f50 drivers/tty/vt/vt_ioctl.c:937
 tty_ioctl+0x65a/0x1610 drivers/tty/tty_io.c:2802
 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+0x193/0x200 fs/ioctl.c:892
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f05b578e969
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:00007f05b6630038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f05b59b5fa0 RCX: 00007f05b578e969
RDX: 0000200000000100 RSI: 000000000000560a RDI: 0000000000000003
RBP: 00007f05b5810ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f05b59b5fa0 R15: 00007ffc2ab15b98
 </TASK>