------------[ cut here ]------------ WARNING: CPU: 1 PID: 8014 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: 1 UID: 0 PID: 8014 Comm: syz.6.617 Not tainted 6.14.0-syzkaller-03576-g1e1ba8d23dae #0 PREEMPT(full) 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 f8 22 f1 fb 48 89 5d 00 b0 01 5b 41 5c 41 5d 41 5e 41 5f 5d e9 ee bf d5 fa e8 6e f5 88 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: 0018:ffffc90002ea7648 EFLAGS: 00010283 RAX: ffffffff863a8122 RBX: 0000003585964a27 RCX: 0000000000080000 RDX: ffffc90017033000 RSI: 0000000000001adf RDI: 0000000000001ae0 RBP: ffffc90002ea77e0 R08: ffffffff863a808f R09: 1ffffffff2079d4e R10: dffffc0000000000 R11: ffffffff863a7fa0 R12: 0000003585964a27 R13: ffff88814278a950 R14: 1ffff920005d4efc R15: ffff88802547c000 FS: 00007f13bc7b56c0(0000) GS:ffff888125324000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c2f55d8 CR3: 000000007fb9c000 CR4: 0000000000350ef0 Call Trace: drm_crtc_get_last_vbltimestamp drivers/gpu/drm/drm_vblank.c:878 [inline] drm_crtc_next_vblank_start+0x257/0x4f0 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+0x27c/0x8e0 drivers/gpu/drm/drm_atomic_helper.c:1605 commit_tail+0x75/0x3d0 drivers/gpu/drm/drm_atomic_helper.c:1819 drm_atomic_helper_commit+0x95d/0xa00 drivers/gpu/drm/drm_atomic_helper.c:2073 drm_atomic_commit+0x298/0x2f0 drivers/gpu/drm/drm_atomic.c:1518 drm_client_modeset_commit_atomic+0x677/0x7d0 drivers/gpu/drm/drm_client_modeset.c:1079 drm_client_modeset_commit_locked+0xe0/0x520 drivers/gpu/drm/drm_client_modeset.c:1182 drm_client_modeset_commit+0x4a/0x70 drivers/gpu/drm/drm_client_modeset.c:1208 __drm_fb_helper_restore_fbdev_mode_unlocked drivers/gpu/drm/drm_fb_helper.c:237 [inline] drm_fb_helper_restore_fbdev_mode_unlocked drivers/gpu/drm/drm_fb_helper.c:264 [inline] drm_fb_helper_lastclose+0xbb/0x180 drivers/gpu/drm/drm_fb_helper.c:1977 drm_fbdev_client_restore+0x34/0x40 drivers/gpu/drm/clients/drm_fbdev_client.c:31 drm_client_dev_restore+0x134/0x270 drivers/gpu/drm/drm_client_event.c:104 drm_lastclose drivers/gpu/drm/drm_file.c:396 [inline] drm_release+0x335/0x410 drivers/gpu/drm/drm_file.c:429 __fput+0x3eb/0x9f0 fs/file_table.c:465 task_work_run+0x253/0x310 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f13bc98d169 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:00007f13bc7b5038 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007f13bcba6160 RCX: 00007f13bc98d169 RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 0000000000000000 RBP: 00007f13bca0e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f13bcba6160 R15: 00007ffe6998c458