------------[ cut here ]------------ WARNING: CPU: 0 PID: 8411 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: 8411 Comm: syz-executor.3 Not tainted 6.8.0-rc7-syzkaller-g707081b61156 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 pstate: 80400005 (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 : ffff800097e46f70 x29: ffff800097e46f70 x28: ffff0000c52f4880 x27: 0000000000000000 x26: 1ffff00012fc8dfc x25: 1ffff00012fc8e20 x24: 0000000000000000 x23: ffff0000c8dd0000 x22: dfff800000000000 x21: 0000001215822900 x20: 0000001215822900 x19: ffff800097e47100 x18: 1fffe000367fff96 x17: ffff80008ec9d000 x16: ffff80008aca6b80 x15: 0000000000000002 x14: 1fffe0001ae58521 x13: 0000000000000000 x12: ffff80009a6ea000 x11: ffff60001ae58523 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : ffff0000cd6f5a00 x7 : 0000000000000000 x6 : ffff80009a6ea000 x5 : ffff0000d72c2918 x4 : ffff0000d72c28d8 x3 : 0000000000000000 x2 : ffff800097e47100 x1 : 0000001215822900 x0 : 0000001215822900 Call trace: vkms_get_vblank_timestamp+0x1a4/0x1d4 drivers/gpu/drm/vkms/vkms_crtc.c:103 drm_crtc_get_last_vbltimestamp drivers/gpu/drm/drm_vblank.c:867 [inline] drm_crtc_next_vblank_start+0x1d4/0x3e0 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+0x200/0x7c4 drivers/gpu/drm/drm_atomic_helper.c:1604 drm_atomic_helper_commit+0x4d0/0x8d4 drivers/gpu/drm/drm_atomic_helper.c:2033 drm_atomic_commit+0x24c/0x2a0 drivers/gpu/drm/drm_atomic.c:1514 drm_client_modeset_commit_atomic+0x5a4/0x730 drivers/gpu/drm/drm_client_modeset.c:1051 drm_client_modeset_commit_locked+0xd0/0x4a8 drivers/gpu/drm/drm_client_modeset.c:1154 drm_client_modeset_commit+0x50/0x7c 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:278 [inline] drm_fb_helper_lastclose+0xc0/0x160 drivers/gpu/drm/drm_fb_helper.c:2005 drm_fbdev_generic_client_restore+0x3c/0x50 drivers/gpu/drm/drm_fbdev_generic.c:258 drm_client_dev_restore+0x12c/0x24c drivers/gpu/drm/drm_client.c:247 drm_lastclose drivers/gpu/drm/drm_file.c:406 [inline] drm_release+0x4ac/0x504 drivers/gpu/drm/drm_file.c:437 __fput+0x30c/0x738 fs/file_table.c:376 ____fput+0x20/0x30 fs/file_table.c:404 task_work_run+0x230/0x2e0 kernel/task_work.c:180 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0x618/0x1f64 kernel/exit.c:871 do_group_exit+0x194/0x22c kernel/exit.c:1020 get_signal+0x1500/0x15ec kernel/signal.c:2893 do_signal+0x238/0x3e8c arch/arm64/kernel/signal.c:1308 do_notify_resume+0x74/0x1f4 arch/arm64/kernel/entry-common.c:148 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline] el0_svc+0xac/0x168 arch/arm64/kernel/entry-common.c:713 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 irq event stamp: 1208 hardirqs last enabled at (1207): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:85 [inline] hardirqs last enabled at (1207): [] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:95 hardirqs last disabled at (1208): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:470 softirqs last enabled at (1202): [] softirq_handle_end kernel/softirq.c:399 [inline] softirqs last enabled at (1202): [] __do_softirq+0xac8/0xce4 kernel/softirq.c:582 softirqs last disabled at (985): [] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:81 ---[ end trace 0000000000000000 ]---