------------[ cut here ]------------ WARNING: CPU: 0 PID: 20969 at drivers/gpu/drm/vkms/vkms_crtc.c:98 vkms_get_vblank_timestamp+0x183/0x1b0 drivers/gpu/drm/vkms/vkms_crtc.c:98 Modules linked in: CPU: 0 UID: 0 PID: 20969 Comm: syz.1.3490 Not tainted 6.14.0-rc4-syzkaller-00220-g5c44ddaf7df3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:vkms_get_vblank_timestamp+0x183/0x1b0 drivers/gpu/drm/vkms/vkms_crtc.c:98 Code: 42 80 3c 30 00 74 08 48 89 ef e8 98 e0 fc fb 48 89 5d 00 b0 01 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc e8 ae 2c 98 fb 90 <0f> 0b 90 eb e4 89 d9 80 e1 07 38 c1 0f 8c cd fe ff ff 48 89 df e8 RSP: 0000:ffffc9000414f668 EFLAGS: 00010283 RAX: ffffffff86299232 RBX: 0000018e2678f009 RCX: 0000000000080000 RDX: ffffc9001f407000 RSI: 000000000000123f RDI: 0000000000001240 RBP: ffffc9000414f800 R08: ffffffff8629919f R09: 0000000000000000 R10: ffffc90003379000 R11: ffffffff862990b0 R12: 0000018e2678f009 R13: ffff88802037c950 R14: 1ffff92000829f00 R15: ffff88802559c000 FS: 00007f72549386c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b3120bff8 CR3: 00000000762d6000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 00000000ffff000b DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: drm_crtc_get_last_vbltimestamp drivers/gpu/drm/drm_vblank.c:878 [inline] drm_crtc_next_vblank_start+0x229/0x490 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+0x277/0x8e0 drivers/gpu/drm/drm_atomic_helper.c:1605 drm_atomic_helper_commit+0x53a/0x9f0 drivers/gpu/drm/drm_atomic_helper.c:2034 drm_atomic_commit+0x294/0x2f0 drivers/gpu/drm/drm_atomic.c:1518 drm_atomic_helper_update_plane+0x238/0x3a0 drivers/gpu/drm/drm_atomic_helper.c:3188 setplane_internal drivers/gpu/drm/drm_plane.c:1095 [inline] drm_mode_setplane+0x73b/0xba0 drivers/gpu/drm/drm_plane.c:1148 drm_ioctl_kernel+0x337/0x440 drivers/gpu/drm/drm_ioctl.c:796 drm_ioctl+0x6be/0xba0 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+0xf5/0x170 fs/ioctl.c:892 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f7253b8d169 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:00007f7254938038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f7253da6080 RCX: 00007f7253b8d169 RDX: 0000400000000200 RSI: 00000000c03064b7 RDI: 0000000000000008 RBP: 00007f7253c0e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f7253da6080 R15: 00007ffcd2e68668