------------[ cut here ]------------ WARNING: CPU: 0 PID: 6715 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: 6715 Comm: syz.1.206 Not tainted 6.13.0-rc6-syzkaller-00038-g09a0fa92e5b4 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 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 b8 85 0e fc 48 89 5d 00 b0 01 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc e8 0e ac aa 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: 0000:ffffc9001b826da8 EFLAGS: 00010287 RAX: ffffffff85f4c7c2 RBX: 000000280006e48f RCX: 0000000000080000 RDX: ffffc9000cb9a000 RSI: 0000000000004b62 RDI: 0000000000004b63 RBP: ffffc9001b826f40 R08: ffffffff85f4c72f R09: 1ffffffff284e31a R10: dffffc0000000000 R11: ffffffff85f4c640 R12: 000000280006e48f R13: ffff888024f2b150 R14: 1ffff92003704de8 R15: ffff888024c60000 FS: 00007fda755d56c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c3236e4 CR3: 0000000033a22000 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+0x229/0x490 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+0x294/0x2f0 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+0x823/0xf10 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+0x2b8/0x17f0 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+0x90f/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+0xf5/0x170 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: 0033:0x7fda77785d29 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:00007fda755d5038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fda77976080 RCX: 00007fda77785d29 RDX: 0000000020000240 RSI: 000000000000560a RDI: 0000000000000008 RBP: 00007fda77801b08 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fda77976080 R15: 00007ffdcde6e7c8