------------[ cut here ]------------ WARNING: CPU: 0 PID: 23490 at drivers/gpu/drm/vkms/vkms_crtc.c:100 vkms_get_vblank_timestamp+0x183/0x1b0 drivers/gpu/drm/vkms/vkms_crtc.c:100 Modules linked in: CPU: 0 UID: 0 PID: 23490 Comm: syz.8.3771 Not tainted 6.12.0-syzkaller-01782-gbf9aa14fc523 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 RIP: 0010:vkms_get_vblank_timestamp+0x183/0x1b0 drivers/gpu/drm/vkms/vkms_crtc.c:100 Code: 42 80 3c 30 00 74 08 48 89 ef e8 b8 8d 08 fc 48 89 5d 00 b0 01 5b 41 5c 41 5d 41 5e 41 5f 5d e9 8e d9 f9 05 e8 5e 82 9e 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:ffffc90004066d28 EFLAGS: 00010283 RAX: ffffffff85f66782 RBX: 000001c55cc14b37 RCX: 0000000000080000 RDX: ffffc9000d8d1000 RSI: 0000000000007af6 RDI: 0000000000007af7 RBP: ffffc90004066ec0 R08: ffffffff85f666ef R09: 1ffffffff285d51a R10: dffffc0000000000 R11: ffffffff85f66600 R12: 000001c55cc14b37 R13: ffff888024d99150 R14: 1ffff9200080cdd8 R15: ffff88802476c000 FS: 00007f44b550c6c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd91e240290 CR3: 000000006150e000 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 commit_tail+0x75/0x3c0 drivers/gpu/drm/drm_atomic_helper.c:1819 drm_atomic_helper_commit+0x953/0x9f0 drivers/gpu/drm/drm_atomic_helper.c:2073 drm_atomic_commit+0x298/0x2f0 drivers/gpu/drm/drm_atomic.c:1516 drm_client_modeset_commit_atomic+0x670/0x7d0 drivers/gpu/drm/drm_client_modeset.c:1068 drm_client_modeset_commit_locked+0xe0/0x520 drivers/gpu/drm/drm_client_modeset.c:1171 pan_display_atomic drivers/gpu/drm/drm_fb_helper.c:1371 [inline] drm_fb_helper_pan_display+0x379/0xc10 drivers/gpu/drm/drm_fb_helper.c:1431 fb_pan_display+0x3a5/0x680 drivers/video/fbdev/core/fbmem.c:191 fb_set_var+0x860/0xf10 drivers/video/fbdev/core/fbmem.c:323 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: 0033:0x7f44b477e819 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:00007f44b550c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f44b4936080 RCX: 00007f44b477e819 RDX: 0000000020000000 RSI: 000000000000560a RDI: 0000000000000004 RBP: 00007f44b47f175e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f44b4936080 R15: 00007ffc1790ae18