------------[ cut here ]------------ WARNING: CPU: 0 PID: 14230 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: 14230 Comm: syz.5.1927 Not tainted 6.13.0-rc7-syzkaller-00039-gc3812b15000c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 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 28 34 09 fc 48 89 5d 00 b0 01 5b 41 5c 41 5d 41 5e 41 5f 5d e9 7e 87 f3 05 e8 de c8 a2 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:ffffc9000b8d6e28 EFLAGS: 00010287 RAX: ffffffff85fcb992 RBX: 000000c3b2cc0c17 RCX: 0000000000080000 RDX: ffffc9000f9f7000 RSI: 0000000000002364 RDI: 0000000000002365 RBP: ffffc9000b8d6fc0 R08: ffffffff85fcb8ff R09: 1ffff11004e508a2 R10: dffffc0000000000 R11: ffffffff85fcb810 R12: 000000c3b2cc0c17 R13: ffff888024fda950 R14: 1ffff9200171adf8 R15: ffff888024ec0000 FS: 00007f6957d516c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b31718ff8 CR3: 000000006094a000 CR4: 0000000000350ef0 Call Trace: drm_crtc_get_last_vbltimestamp drivers/gpu/drm/drm_vblank.c:878 [inline] drm_crtc_next_vblank_start+0x22b/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+0x296/0x2f0 drivers/gpu/drm/drm_atomic.c:1518 drm_client_modeset_commit_atomic+0x670/0x7d0 drivers/gpu/drm/drm_client_modeset.c:1070 drm_client_modeset_commit_locked+0xe0/0x520 drivers/gpu/drm/drm_client_modeset.c:1173 drm_client_modeset_commit+0x4a/0x70 drivers/gpu/drm/drm_client_modeset.c:1199 __drm_fb_helper_restore_fbdev_mode_unlocked+0xc3/0x170 drivers/gpu/drm/drm_fb_helper.c:237 drm_fb_helper_set_par+0xaf/0x100 drivers/gpu/drm/drm_fb_helper.c:1351 fb_set_var+0x825/0xf10 drivers/video/fbdev/core/fbmem.c:312 fbcon_resize+0xc96/0x1940 drivers/video/fbdev/core/fbcon.c:2069 resize_screen drivers/tty/vt/vt.c:1112 [inline] vc_do_resize+0x2ba/0x17f0 drivers/tty/vt/vt.c:1169 vt_resizex+0x5b2/0x900 drivers/tty/vt/vt_ioctl.c:717 vt_ioctl+0x103e/0x2090 drivers/tty/vt/vt_ioctl.c:937 tty_ioctl+0x911/0xdc0 drivers/tty/tty_io.c:2803 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl+0xf7/0x170 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: 0033:0x7f6956f85d29 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:00007f6957d51038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f6957176080 RCX: 00007f6956f85d29 RDX: 0000000020000000 RSI: 000000000000560a RDI: 000000000000000a RBP: 00007f6957001b08 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f6957176080 R15: 00007ffc85007408