------------[ cut here ]------------ WARNING: CPU: 0 PID: 15697 at drivers/gpu/drm/vkms/vkms_crtc.c:100 vkms_get_vblank_timestamp+0x185/0x1e0 drivers/gpu/drm/vkms/vkms_crtc.c:100 Modules linked in: CPU: 0 UID: 0 PID: 15697 Comm: syz.0.2785 Not tainted 6.12.0-rc6-syzkaller-00279-gde2f378f2b77 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 RIP: 0010:vkms_get_vblank_timestamp+0x185/0x1e0 drivers/gpu/drm/vkms/vkms_crtc.c:100 Code: e0 fb e8 9e 39 ce 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 9c 4c e0 fb 90 <0f> 0b 90 eb b5 e8 11 d6 41 fc e9 dc fe ff ff 48 89 df e8 94 d6 41 RSP: 0018:ffffc9000ca9f810 EFLAGS: 00010287 RAX: 00000000000040e2 RBX: 000000c0ec0dd8b8 RCX: ffffc9000d8a5000 RDX: 0000000000040000 RSI: ffffffff85ad2eb4 RDI: 0000000000000006 RBP: ffffc9000ca9f978 R08: 0000000000000006 R09: 000000c0ec0dd8b8 R10: 000000c0ec0dd8b8 R11: 0000000000000000 R12: 000000c0ec0dd8b8 R13: ffff888025860000 R14: 0000000000004e20 R15: ffffffff85ad2d30 FS: 00007f43fb3b76c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2fc06ff8 CR3: 000000006b878000 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+0x229/0x300 drivers/gpu/drm/drm_atomic.c:1516 drm_client_modeset_commit_atomic+0x6b0/0x800 drivers/gpu/drm/drm_client_modeset.c:1068 drm_client_modeset_commit_locked+0x14d/0x580 drivers/gpu/drm/drm_client_modeset.c:1171 drm_client_modeset_commit+0x4f/0x80 drivers/gpu/drm/drm_client_modeset.c:1197 __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:216 [inline] drm_fb_helper_restore_fbdev_mode_unlocked drivers/gpu/drm/drm_fb_helper.c:264 [inline] drm_fb_helper_lastclose+0xc7/0x160 drivers/gpu/drm/drm_fb_helper.c:2003 drm_fbdev_shmem_client_restore+0x2c/0x40 drivers/gpu/drm/drm_fbdev_shmem.c:229 drm_client_dev_restore+0x188/0x2a0 drivers/gpu/drm/drm_client.c:260 drm_lastclose drivers/gpu/drm/drm_file.c:391 [inline] drm_release+0x2c2/0x360 drivers/gpu/drm/drm_file.c:424 __fput+0x3f6/0xb60 fs/file_table.c:431 task_work_run+0x14e/0x250 kernel/task_work.c:239 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:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x27b/0x2a0 kernel/entry/common.c:218 do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f43fb57e719 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:00007f43fb3b7038 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007f43fb736130 RCX: 00007f43fb57e719 RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 0000000000000006 RBP: 00007f43fb5f139e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f43fb736130 R15: 00007ffd543690c8