------------[ cut here ]------------ WARNING: CPU: 0 PID: 20872 at drivers/gpu/drm/vkms/vkms_crtc.c:103 vkms_get_vblank_timestamp+0x188/0x1e4 drivers/gpu/drm/vkms/vkms_crtc.c:116 Modules linked in: CPU: 0 PID: 20872 Comm: syz-executor.0 Not tainted 6.9.0-rc2-syzkaller-00193-gc88b9b4cde17 #0 Hardware name: linux,dummy-virt (DT) pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : vkms_get_vblank_timestamp+0x188/0x1e4 drivers/gpu/drm/vkms/vkms_crtc.c:103 lr : drm_crtc_get_last_vbltimestamp+0x140/0x184 drivers/gpu/drm/drm_vblank.c:867 sp : ffff80008de07600 x29: ffff80008de07600 x28: ffff000013250000 x27: 0000000000000003 x26: ffff00000fac4d28 x25: 0000000000000001 x24: ffff00000fac4d28 x23: ffff8000853776e0 x22: 000009afe361d730 x21: ffff80008de077d0 x20: ffff00000c0d6080 x19: ffff00000fac4000 x18: ffff0000135f4670 x17: 0000000000000000 x16: 0000000000000006 x15: 1fffe000026be8cd x14: 1fffe000026be8f0 x13: 1fffe000026be8ca x12: ffff700011bc0ebf x11: 1ffff00011bc0ebe x10: ffff700011bc0ebe x9 : dfff800000000000 x8 : 0000000041b58ab3 x7 : ffff700011bc0ed0 x6 : dfff800000000000 x5 : 0000000000000000 x4 : ffff800081bb33f0 x3 : 1fffe0000181ac49 x2 : 1fffe0000181ac35 x1 : 0000000000000000 x0 : 000009afe361d730 Call trace: vkms_get_vblank_timestamp+0x188/0x1e4 drivers/gpu/drm/vkms/vkms_crtc.c:116 drm_crtc_get_last_vbltimestamp+0x140/0x184 drivers/gpu/drm/drm_vblank.c:867 drm_crtc_next_vblank_start+0x11c/0x244 drivers/gpu/drm/drm_vblank.c:1002 set_fence_deadline drivers/gpu/drm/drm_atomic_helper.c:1557 [inline] drm_atomic_helper_wait_for_fences+0x184/0x614 drivers/gpu/drm/drm_atomic_helper.c:1604 drm_atomic_helper_commit+0x170/0x2b4 drivers/gpu/drm/drm_atomic_helper.c:2033 drm_atomic_commit+0x1c8/0x27c drivers/gpu/drm/drm_atomic.c:1514 drm_client_modeset_commit_atomic+0x4a0/0x5f4 drivers/gpu/drm/drm_client_modeset.c:1051 drm_client_modeset_commit_locked+0x108/0x3fc drivers/gpu/drm/drm_client_modeset.c:1154 drm_client_modeset_commit+0x44/0x74 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+0xac/0x130 drivers/gpu/drm/drm_fb_helper.c:2005 drm_fbdev_generic_client_restore+0x30/0x4c drivers/gpu/drm/drm_fbdev_generic.c:258 drm_client_dev_restore+0x128/0x210 drivers/gpu/drm/drm_client.c:247 drm_lastclose+0xc4/0x174 drivers/gpu/drm/drm_file.c:406 drm_release+0x210/0x328 drivers/gpu/drm/drm_file.c:437 __fput+0x1a4/0x92c fs/file_table.c:422 __fput_sync+0x74/0x84 fs/file_table.c:507 __do_sys_close fs/open.c:1556 [inline] __se_sys_close fs/open.c:1541 [inline] __arm64_sys_close+0x6c/0xbc fs/open.c:1541 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x6c/0x258 arch/arm64/kernel/syscall.c:48 el0_svc_common.constprop.0+0xac/0x230 arch/arm64/kernel/syscall.c:133 do_el0_svc_compat+0x40/0x68 arch/arm64/kernel/syscall.c:158 el0_svc_compat+0x4c/0x17c arch/arm64/kernel/entry-common.c:852 el0t_32_sync_handler+0x98/0x13c arch/arm64/kernel/entry-common.c:862 el0t_32_sync+0x194/0x198 arch/arm64/kernel/entry.S:603 irq event stamp: 2706 hardirqs last enabled at (2705): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:85 [inline] hardirqs last enabled at (2705): [] exit_to_kernel_mode+0x38/0x118 arch/arm64/kernel/entry-common.c:95 hardirqs last disabled at (2706): [] el1_dbg+0x24/0x9c arch/arm64/kernel/entry-common.c:470 softirqs last enabled at (2700): [] softirq_handle_end kernel/softirq.c:400 [inline] softirqs last enabled at (2700): [] __do_softirq+0x8d4/0xde8 kernel/softirq.c:583 softirqs last disabled at (2659): [] ____do_softirq+0x10/0x1c arch/arm64/kernel/irq.c:81 ---[ end trace 0000000000000000 ]---