------------[ cut here ]------------ WARNING: CPU: 0 PID: 8944 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: 0 PID: 8944 Comm: syz-executor.2 Not tainted 6.9.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 RIP: 0010:vkms_get_vblank_timestamp+0x1d2/0x210 drivers/gpu/drm/vkms/vkms_crtc.c:103 Code: 00 74 08 48 89 ef e8 fd 27 1b fc 48 89 5d 00 b0 01 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc e8 9f c4 b6 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:ffffc90003357680 EFLAGS: 00010287 RAX: ffffffff85df3cc1 RBX: 00000035bf47174d RCX: 0000000000040000 RDX: ffffc90011767000 RSI: 000000000000122d RDI: 000000000000122e RBP: ffffc90003357820 R08: ffffffff85df3c29 R09: 0000000000000000 R10: ffff888023b3ec80 R11: ffffffff85df3af0 R12: 00000035bf47174d R13: 1ffff9200066af04 R14: 0000000000000000 R15: ffff88801f794000 FS: 00007f6554dfa6c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2be2a000 CR3: 000000005b08c000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: drm_crtc_get_last_vbltimestamp drivers/gpu/drm/drm_vblank.c:867 [inline] drm_crtc_next_vblank_start+0x22d/0x480 drivers/gpu/drm/drm_vblank.c:1002 set_fence_deadline drivers/gpu/drm/drm_atomic_helper.c:1557 [inline] drm_atomic_helper_wait_for_fences+0x277/0x8d0 drivers/gpu/drm/drm_atomic_helper.c:1604 drm_atomic_helper_commit+0x53a/0x9f0 drivers/gpu/drm/drm_atomic_helper.c:2033 drm_atomic_commit+0x2ac/0x310 drivers/gpu/drm/drm_atomic.c:1514 drm_atomic_helper_disable_plane+0x159/0x1f0 drivers/gpu/drm/drm_atomic_helper.c:3228 setplane_internal drivers/gpu/drm/drm_plane.c:1068 [inline] drm_mode_setplane+0x740/0xba0 drivers/gpu/drm/drm_plane.c:1121 drm_ioctl_kernel+0x33a/0x440 drivers/gpu/drm/drm_ioctl.c:744 drm_ioctl+0x63a/0xb10 drivers/gpu/drm/drm_ioctl.c:841 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:904 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:890 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f655407dea9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6554dfa0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f65541ac050 RCX: 00007f655407dea9 RDX: 0000000020000040 RSI: 00000000c03064b7 RDI: 0000000000000006 RBP: 00007f65540ca4a4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f65541ac050 R15: 00007f65542cf9f8