------------[ cut here ]------------ WARNING: CPU: 1 PID: 11059 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: 11059 Comm: syz.4.1459 Not tainted 6.13.0-rc3-syzkaller-00062-gc061cf420ded #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024 RIP: 0010:vkms_get_vblank_timestamp+0x185/0x1e0 drivers/gpu/drm/vkms/vkms_crtc.c:98 Code: da fb e8 8e c4 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 5c fe da fb 90 <0f> 0b 90 eb b5 e8 d1 a3 3d fc e9 dc fe ff ff 48 89 df e8 54 a4 3d RSP: 0018:ffffc9000402f4f8 EFLAGS: 00010287 RAX: 00000000000055d1 RBX: 0000007f6fcab083 RCX: ffffc9001282e000 RDX: 0000000000080000 RSI: ffffffff85bf16f4 RDI: 0000000000000006 RBP: ffffc9000402f660 R08: 0000000000000006 R09: 0000007f6fcab083 R10: 0000007f6fcab083 R11: 0000000000000000 R12: 0000007f6fcab083 R13: ffff888024ed8000 R14: 0000000000004e20 R15: ffffffff85bf1570 FS: 00007f3aab1f66c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2fa0dff8 CR3: 000000002eade000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: 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 drm_atomic_helper_update_plane+0x30b/0x400 drivers/gpu/drm/drm_atomic_helper.c:3188 __setplane_atomic+0x250/0x360 drivers/gpu/drm/drm_plane.c:1074 drm_mode_cursor_universal+0x4a7/0xcb0 drivers/gpu/drm/drm_plane.c:1229 drm_mode_cursor_common+0x30a/0x960 drivers/gpu/drm/drm_plane.c:1288 drm_mode_cursor_ioctl+0xd2/0x110 drivers/gpu/drm/drm_plane.c:1338 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: 0033:0x7f3aad385d29 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:00007f3aab1f6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f3aad576160 RCX: 00007f3aad385d29 RDX: 0000000020000040 RSI: 00000000c01c64a3 RDI: 0000000000000006 RBP: 00007f3aad401a20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f3aad576160 R15: 00007ffd56db88e8