------------[ cut here ]------------ WARNING: CPU: 0 PID: 26112 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: 26112 Comm: syz-executor.0 Not tainted 6.8.0-rc7-syzkaller #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 : ffff80008aa16d70 x29: ffff80008aa16d70 x28: ffff000025181000 x27: 0000000000000003 x26: ffff00000f8fcd28 x25: 0000000000000001 x24: ffff00000f8fcd28 x23: ffff8000852aa5e0 x22: 0000074686375670 x21: ffff80008aa16f40 x20: ffff00000b3ae880 x19: ffff00000f8fc000 x18: ffff00001343e398 x17: 0000000000000000 x16: 0000000000000006 x15: 1fffe00002687c72 x14: 1fffe00002687c95 x13: 1fffe00002687c6f x12: ffff700011542dad x11: 1ffff00011542dac x10: ffff700011542dac x9 : dfff800000000000 x8 : 0000000041b58ab3 x7 : ffff700011542dbe x6 : dfff800000000000 x5 : 0000000000000000 x4 : ffff800081b56180 x3 : 1fffe00001675d49 x2 : 1fffe00001675d35 x1 : 0000000000000000 x0 : 0000074686375670 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+0x1ac/0x264 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+0xf8/0x144 drivers/gpu/drm/drm_fb_helper.c:230 drm_fb_helper_set_par+0xa0/0xd8 drivers/gpu/drm/drm_fb_helper.c:1344 fb_set_var+0x57c/0xe18 drivers/video/fbdev/core/fbmem.c:312 fbcon_resize+0x94c/0xd18 drivers/video/fbdev/core/fbcon.c:2052 resize_screen drivers/tty/vt/vt.c:1124 [inline] vc_do_resize+0x8fc/0xd00 drivers/tty/vt/vt.c:1188 vc_resize+0x40/0x60 drivers/tty/vt/vt.c:1311 vt_resizex drivers/tty/vt/vt_ioctl.c:718 [inline] vt_ioctl+0x1bec/0x28b8 drivers/tty/vt/vt_ioctl.c:939 vt_compat_ioctl+0x184/0x52c drivers/tty/vt/vt_ioctl.c:1110 tty_compat_ioctl+0x12c/0x514 drivers/tty/tty_io.c:2982 __do_compat_sys_ioctl fs/ioctl.c:971 [inline] __se_compat_sys_ioctl fs/ioctl.c:914 [inline] __arm64_compat_sys_ioctl+0x1d4/0x220 fs/ioctl.c:914 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x6c/0x258 arch/arm64/kernel/syscall.c:51 el0_svc_common.constprop.0+0xac/0x230 arch/arm64/kernel/syscall.c:136 do_el0_svc_compat+0x40/0x68 arch/arm64/kernel/syscall.c:161 el0_svc_compat+0x54/0x13c arch/arm64/kernel/entry-common.c:818 el0t_32_sync_handler+0x98/0x13c arch/arm64/kernel/entry-common.c:828 el0t_32_sync+0x194/0x198 arch/arm64/kernel/entry.S:603 irq event stamp: 542 hardirqs last enabled at (541): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:84 [inline] hardirqs last enabled at (541): [] exit_to_kernel_mode+0x38/0x118 arch/arm64/kernel/entry-common.c:94 hardirqs last disabled at (542): [] el1_dbg+0x24/0x9c arch/arm64/kernel/entry-common.c:436 softirqs last enabled at (474): [] softirq_handle_end kernel/softirq.c:399 [inline] softirqs last enabled at (474): [] __do_softirq+0x888/0xd9c kernel/softirq.c:582 softirqs last disabled at (411): [] ____do_softirq+0x10/0x1c arch/arm64/kernel/irq.c:81 ---[ end trace 0000000000000000 ]---