------------[ cut here ]------------ WARNING: CPU: 1 PID: 5630 at drivers/gpu/drm/vkms/vkms_crtc.c:103 vkms_get_vblank_timestamp+0x1dc/0x250 drivers/gpu/drm/vkms/vkms_crtc.c:103 Modules linked in: CPU: 1 PID: 5630 Comm: syz-executor.1 Not tainted 6.9.0-rc1-syzkaller-00021-g962490525cff #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:vkms_get_vblank_timestamp+0x1dc/0x250 drivers/gpu/drm/vkms/vkms_crtc.c:103 Code: fe fb e8 47 ba ec fb 4c 89 e1 48 ba 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 11 00 75 67 49 89 04 24 eb c0 e8 85 aa fe fb 90 <0f> 0b 90 eb b5 e8 ea 2a 5b fc e9 d8 fe ff ff e8 40 2b 5b fc e9 6a RSP: 0018:ffffc900029d7298 EFLAGS: 00010093 RAX: 0000000000000000 RBX: 0000000cf37479a7 RCX: ffffffff858f6aaf RDX: ffff88801b3ec880 RSI: ffffffff858f6b2b RDI: 0000000000000006 RBP: ffff88801d828000 R08: 0000000000000006 R09: 0000000cf37479a7 R10: 0000000cf37479a7 R11: 0000000000000008 R12: ffffc900029d73c0 R13: 0000000cf37479a7 R14: 0000000000004e20 R15: ffffffff858f6950 FS: 0000000000000000(0000) GS:ffff88802c300000(0000) knlGS:0000000000000000 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f73ff020 CR3: 0000000026900000 CR4: 0000000000350ef0 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:867 drm_get_last_vbltimestamp drivers/gpu/drm/drm_vblank.c:886 [inline] drm_update_vblank_count+0x1b1/0x9d0 drivers/gpu/drm/drm_vblank.c:298 drm_vblank_disable_and_save+0x12e/0x3d0 drivers/gpu/drm/drm_vblank.c:467 drm_crtc_vblank_off+0x325/0x9a0 drivers/gpu/drm/drm_vblank.c:1351 disable_outputs+0x81b/0xca0 drivers/gpu/drm/drm_atomic_helper.c:1213 drm_atomic_helper_commit_modeset_disables+0x1c/0x40 drivers/gpu/drm/drm_atomic_helper.c:1417 vkms_atomic_commit_tail+0x51/0x240 drivers/gpu/drm/vkms/vkms_drv.c:71 commit_tail+0x284/0x410 drivers/gpu/drm/drm_atomic_helper.c:1832 drm_atomic_helper_commit+0x2fd/0x380 drivers/gpu/drm/drm_atomic_helper.c:2072 drm_atomic_commit+0x227/0x300 drivers/gpu/drm/drm_atomic.c:1514 drm_client_modeset_commit_atomic+0x6c6/0x810 drivers/gpu/drm/drm_client_modeset.c:1051 drm_client_modeset_commit_locked+0x14d/0x580 drivers/gpu/drm/drm_client_modeset.c:1154 drm_client_modeset_commit+0x4f/0x80 drivers/gpu/drm/drm_client_modeset.c:1180 __drm_fb_helper_restore_fbdev_mode_unlocked drivers/gpu/drm/drm_fb_helper.c:251 [inline] __drm_fb_helper_restore_fbdev_mode_unlocked drivers/gpu/drm/drm_fb_helper.c:230 [inline] drm_fb_helper_restore_fbdev_mode_unlocked drivers/gpu/drm/drm_fb_helper.c:278 [inline] drm_fb_helper_lastclose+0xc7/0x160 drivers/gpu/drm/drm_fb_helper.c:2005 drm_fbdev_generic_client_restore+0x2c/0x40 drivers/gpu/drm/drm_fbdev_generic.c:258 drm_client_dev_restore+0x188/0x2a0 drivers/gpu/drm/drm_client.c:247 drm_release+0x32f/0x3e0 drivers/gpu/drm/drm_file.c:437 __fput+0x270/0xb80 fs/file_table.c:422 task_work_run+0x14e/0x250 kernel/task_work.c:180 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0xa7d/0x2c10 kernel/exit.c:878 do_group_exit+0xd3/0x2a0 kernel/exit.c:1027 get_signal+0x25c3/0x2670 kernel/signal.c:2911 arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop kernel/entry/common.c:111 [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+0x14a/0x2a0 kernel/entry/common.c:218 __do_fast_syscall_32+0x8a/0x120 arch/x86/entry/common.c:324 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:346 entry_SYSENTER_compat_after_hwframe+0x7a/0x84 RIP: 0023:0xf7278579 Code: Unable to access opcode bytes at 0xf727854f. RSP: 002b:00000000f5e305ac EFLAGS: 00000292 ORIG_RAX: 0000000000000036 RAX: 0000000000000000 RBX: 0000000000000003 RCX: 00000000c06864a2 RDX: 0000000020000400 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000