------------[ cut here ]------------ WARNING: CPU: 0 PID: 6182 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: 6182 Comm: syz-executor265 Not tainted 6.8.0-rc2-syzkaller-g41bccc98fb79 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 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 : ffff8000978971b0 x29: ffff8000978971b0 x28: 0000000000004e20 x27: ffff800097897290 x26: ffff800097897280 x25: 1ffff00012f12e52 x24: 0000000000000000 x23: ffff0000c9bf8000 x22: dfff800000000000 x21: 000000083506bd69 x20: 000000083506bd69 x19: ffff800097897290 x18: ffff8000978978c8 x17: 0000000000000000 x16: ffff800080339d14 x15: ffff700012f12e50 x14: 1ffff00012f12e50 x13: 0000000000000004 x12: ffff700012f12e4c x11: ffff800083efb748 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : ffff0000dd6fbc00 x7 : ffff800083efb514 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000000 x2 : ffff800097897290 x1 : 000000083506bd69 x0 : 000000083506bd69 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_get_last_vbltimestamp drivers/gpu/drm/drm_vblank.c:886 [inline] drm_update_vblank_count+0x1fc/0xa5c drivers/gpu/drm/drm_vblank.c:298 drm_crtc_accurate_vblank_count+0x114/0x334 drivers/gpu/drm/drm_vblank.c:411 drm_crtc_arm_vblank_event+0xa8/0x1e0 drivers/gpu/drm/drm_vblank.c:1097 vkms_crtc_atomic_flush+0x1a8/0x1b4 drivers/gpu/drm/vkms/vkms_crtc.c:258 drm_atomic_helper_commit_planes+0x954/0xbe0 drivers/gpu/drm/drm_atomic_helper.c:2820 vkms_atomic_commit_tail+0x6c/0x20c drivers/gpu/drm/vkms/vkms_drv.c:73 commit_tail+0x274/0x3b8 drivers/gpu/drm/drm_atomic_helper.c:1832 drm_atomic_helper_commit+0x854/0x8d4 drivers/gpu/drm/drm_atomic_helper.c:2072 drm_atomic_commit+0x24c/0x2a0 drivers/gpu/drm/drm_atomic.c:1514 drm_atomic_helper_set_config+0xe8/0x198 drivers/gpu/drm/drm_atomic_helper.c:3271 drm_mode_setcrtc+0x918/0x13e8 drivers/gpu/drm/drm_crtc.c:886 drm_ioctl_kernel+0x26c/0x368 drivers/gpu/drm/drm_ioctl.c:744 drm_ioctl+0x5e4/0xae4 drivers/gpu/drm/drm_ioctl.c:841 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl fs/ioctl.c:857 [inline] __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:857 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 irq event stamp: 810 hardirqs last enabled at (809): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (809): [] _raw_spin_unlock_irq+0x30/0x80 kernel/locking/spinlock.c:202 hardirqs last disabled at (810): [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:117 [inline] hardirqs last disabled at (810): [] _raw_spin_lock_irq+0x28/0x70 kernel/locking/spinlock.c:170 softirqs last enabled at (436): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (434): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]---