------------[ cut here ]------------ WARNING: CPU: 1 PID: 5380 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: 1 PID: 5380 Comm: syz-executor311 Not tainted 6.9.0-rc3-syzkaller-gb5d2afe8745b #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 : ffff80009e1a7530 x29: ffff80009e1a7530 x28: ffff0000c2577880 x27: 0000000000000000 x26: 1ffff00013c34eb4 x25: 1ffff00013c34ed8 x24: 0000000000000000 x23: ffff0000c8e04000 x22: dfff800000000000 x21: 00000113b21f26d0 x20: 00000113b21f26d0 x19: ffff80009e1a76c0 x18: 0000000000000000 x17: 0000000000000000 x16: ffff80008adab880 x15: 0000000000000002 x14: 1fffe00019c0f8a1 x13: 0000000000000000 x12: ffff80009b189000 x11: ffff600019c0f8a3 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : ffff0000ca08dac0 x7 : 0000000000000000 x6 : ffff80009b189000 x5 : ffff0000ce07c518 x4 : ffff0000ce07c4d8 x3 : 0000000000000000 x2 : ffff80009e1a76c0 x1 : 00000113b21f26d0 x0 : 00000113b21f26d0 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+0x274/0x2d0 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:422 __fput_sync+0x60/0x9c fs/file_table.c:507 __do_sys_close fs/open.c:1556 [inline] __se_sys_close fs/open.c:1541 [inline] __arm64_sys_close+0x150/0x1e0 fs/open.c:1541 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 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: 2116 hardirqs last enabled at (2115): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:85 [inline] hardirqs last enabled at (2115): [] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:95 hardirqs last disabled at (2116): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:470 softirqs last enabled at (2110): [] softirq_handle_end kernel/softirq.c:400 [inline] softirqs last enabled at (2110): [] __do_softirq+0xb10/0xd2c kernel/softirq.c:583 softirqs last disabled at (2007): [] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:81 ---[ end trace 0000000000000000 ]---