------------[ cut here ]------------ WARNING: CPU: 1 PID: 12579 at drivers/gpu/drm/vkms/vkms_crtc.c:97 vkms_get_vblank_timestamp+0x137/0x160 drivers/gpu/drm/vkms/vkms_crtc.c:97 Modules linked in: CPU: 1 UID: 0 PID: 12579 Comm: syz.2.1336 Not tainted 6.15.0-rc5-syzkaller-00300-g3ce9925823c7 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:vkms_get_vblank_timestamp+0x137/0x160 drivers/gpu/drm/vkms/vkms_crtc.c:97 Code: 42 80 3c 28 00 74 08 48 89 df e8 84 3e 3d fc 4c 89 33 b0 01 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 aa 48 db fb 90 <0f> 0b 90 eb e3 44 89 e1 80 e1 07 38 c1 0f 8c ff fe ff ff 4c 89 e7 RSP: 0018:ffffc9001aedef88 EFLAGS: 00010287 RAX: ffffffff85e48786 RBX: ffffc9001aedf100 RCX: 0000000000080000 RDX: ffffc90010675000 RSI: 0000000000000d7a RDI: 0000000000000d7b RBP: 1ffff920035dbe20 R08: ffffc90003279000 R09: 0000000000000000 R10: ffffc90003279000 R11: ffffffff85e48650 R12: 000000c52ede202a R13: dffffc0000000000 R14: ffff8881427e0028 R15: 000000c52ede202a FS: 00007f2e5902c6c0(0000) GS:ffff8881261cb000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000209030 CR3: 000000007b40c000 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:878 [inline] drm_crtc_next_vblank_start+0x223/0x470 drivers/gpu/drm/drm_vblank.c:1012 set_fence_deadline drivers/gpu/drm/drm_atomic_helper.c:1596 [inline] drm_atomic_helper_wait_for_fences+0x265/0x8c0 drivers/gpu/drm/drm_atomic_helper.c:1643 drm_atomic_helper_commit+0x5c7/0xb10 drivers/gpu/drm/drm_atomic_helper.c:2072 drm_atomic_commit+0x25f/0x2c0 drivers/gpu/drm/drm_atomic.c:1518 drm_client_modeset_commit_atomic+0x620/0x760 drivers/gpu/drm/drm_client_modeset.c:1079 drm_client_modeset_commit_locked+0xcb/0x4d0 drivers/gpu/drm/drm_client_modeset.c:1182 pan_display_atomic drivers/gpu/drm/drm_fb_helper.c:1387 [inline] drm_fb_helper_pan_display+0x3e7/0xbd0 drivers/gpu/drm/drm_fb_helper.c:1447 fb_pan_display+0x39b/0x680 drivers/video/fbdev/core/fbmem.c:191 fb_set_var+0x84a/0xf60 drivers/video/fbdev/core/fbmem.c:323 fbcon_resize+0xaf8/0x1480 drivers/video/fbdev/core/fbcon.c:2070 resize_screen drivers/tty/vt/vt.c:1112 [inline] vc_do_resize+0x2c0/0x1770 drivers/tty/vt/vt.c:1169 vt_resize+0x81/0xd0 drivers/tty/vt/vt.c:1315 tiocswinsz+0xfb/0x150 drivers/tty/tty_io.c:2378 tty_ioctl+0x225/0xde0 drivers/tty/tty_io.c:2720 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:892 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2e5818e969 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:00007f2e5902c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f2e583b6240 RCX: 00007f2e5818e969 RDX: 0000200000000000 RSI: 0000000000005414 RDI: 000000000000000d RBP: 00007f2e58210ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f2e583b6240 R15: 00007f2e584dfa28