------------[ cut here ]------------ WARNING: CPU: 0 PID: 4036 at drivers/gpu/drm/vkms/vkms_crtc.c:103 vkms_get_vblank_timestamp+0x1a4/0x1d4 drivers/gpu/drm/vkms/vkms_crtc.c:103 Modules linked in: CPU: 0 PID: 4036 Comm: syz-executor892 Not tainted 5.15.171-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 pstate: 804000c5 (Nzcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : vkms_get_vblank_timestamp+0x1a4/0x1d4 drivers/gpu/drm/vkms/vkms_crtc.c:103 lr : vkms_get_vblank_timestamp+0x1a4/0x1d4 drivers/gpu/drm/vkms/vkms_crtc.c:103 sp : ffff80001f9771b0 x29: ffff80001f9771b0 x28: ffff80001f977270 x27: ffff0000cb40cee8 x26: ffff80001f977260 x25: 1ffff00003f2ee4e x24: 0000000000000000 x23: ffff0000cb40c000 x22: dfff800000000000 x21: 0000000ad685d119 x20: 0000000ad685d119 x19: ffff80001f977270 x18: 0000000000000000 x17: 0000000000000000 x16: ffff8000083052d8 x15: 0000000000000008 x14: 1ffff0000295a06a x13: dfff800000000000 x12: ffff700003f2ee48 x11: 0000000000000003 x10: 0000000000000000 x9 : ffff0000cd09b680 x8 : ffff80000b80a6cc x7 : ffff80000b71c110 x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000 x2 : ffff80001f977270 x1 : 0000000ad685d119 x0 : 0000000ad685d119 Call trace: vkms_get_vblank_timestamp+0x1a4/0x1d4 drivers/gpu/drm/vkms/vkms_crtc.c:103 drm_get_last_vbltimestamp drivers/gpu/drm/drm_vblank.c:881 [inline] drm_update_vblank_count+0x23c/0xb10 drivers/gpu/drm/drm_vblank.c:303 drm_vblank_disable_and_save+0xc8/0x344 drivers/gpu/drm/drm_vblank.c:477 drm_crtc_vblank_off+0x254/0x7c4 drivers/gpu/drm/drm_vblank.c:1325 vkms_crtc_atomic_disable+0x20/0x30 drivers/gpu/drm/vkms/vkms_crtc.c:234 disable_outputs drivers/gpu/drm/drm_atomic_helper.c:1117 [inline] drm_atomic_helper_commit_modeset_disables+0xa10/0x1488 drivers/gpu/drm/drm_atomic_helper.c:1321 vkms_atomic_commit_tail+0x5c/0x20c drivers/gpu/drm/vkms/vkms_drv.c:71 commit_tail+0x274/0x3cc drivers/gpu/drm/drm_atomic_helper.c:1693 drm_atomic_helper_commit+0x5fc/0x644 drivers/gpu/drm/drm_atomic_helper.c:1912 drm_atomic_commit+0xd8/0xf8 drivers/gpu/drm/drm_atomic.c:1426 drm_client_modeset_commit_atomic+0x594/0x730 drivers/gpu/drm/drm_client_modeset.c:1055 drm_client_modeset_commit_locked+0xd0/0x4a8 drivers/gpu/drm/drm_client_modeset.c:1158 drm_client_modeset_commit+0x50/0x7c drivers/gpu/drm/drm_client_modeset.c:1184 __drm_fb_helper_restore_fbdev_mode_unlocked drivers/gpu/drm/drm_fb_helper.c:252 [inline] drm_fb_helper_restore_fbdev_mode_unlocked drivers/gpu/drm/drm_fb_helper.c:279 [inline] drm_fb_helper_lastclose drivers/gpu/drm/drm_fb_helper.c:2005 [inline] drm_fbdev_client_restore+0xe8/0x17c drivers/gpu/drm/drm_fb_helper.c:2408 drm_client_dev_restore+0x12c/0x248 drivers/gpu/drm/drm_client.c:226 drm_lastclose drivers/gpu/drm/drm_file.c:467 [inline] drm_release+0x4dc/0x654 drivers/gpu/drm/drm_file.c:498 __fput+0x1c4/0x800 fs/file_table.c:280 ____fput+0x20/0x30 fs/file_table.c:308 task_work_run+0x130/0x1e4 kernel/task_work.c:188 exit_task_work include/linux/task_work.h:33 [inline] do_exit+0x670/0x20bc kernel/exit.c:874 do_group_exit+0x110/0x268 kernel/exit.c:996 __do_sys_exit_group kernel/exit.c:1007 [inline] __se_sys_exit_group kernel/exit.c:1005 [inline] __wake_up_parent+0x0/0x60 kernel/exit.c:1005 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 irq event stamp: 1502 hardirqs last enabled at (1501): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] hardirqs last enabled at (1501): [] _raw_spin_unlock_irq+0x9c/0x134 kernel/locking/spinlock.c:202 hardirqs last disabled at (1502): [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:126 [inline] hardirqs last disabled at (1502): [] _raw_spin_lock_irq+0x38/0x13c kernel/locking/spinlock.c:170 softirqs last enabled at (986): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:31 softirqs last disabled at (984): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:18 ---[ end trace a48bb08d33d6dd86 ]---