------------[ cut here ]------------ WARNING: CPU: 1 PID: 5936 at drivers/gpu/drm/vkms/vkms_crtc.c:100 vkms_get_vblank_timestamp+0x148/0x194 drivers/gpu/drm/vkms/vkms_crtc.c:113 Modules linked in: CPU: 1 PID: 5936 Comm: syz-executor.0 Tainted: G W 6.10.0-rc1-syzkaller-g83814698cf48 #0 Hardware name: linux,dummy-virt (DT) pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : vkms_get_vblank_timestamp+0x148/0x194 drivers/gpu/drm/vkms/vkms_crtc.c:100 lr : vkms_get_vblank_timestamp+0x3c/0x194 drivers/gpu/drm/vkms/vkms_crtc.c:91 sp : ffff80008d667600 x29: ffff80008d667600 x28: ffff000012acb400 x27: 0000000000000003 x26: ffff00000f768d70 x25: 0000000000000001 x24: 1fffe000017a7838 x23: ffff80008540c840 x22: 0000011b0e811200 x21: ffff00000f768000 x20: ffff80008d6677d0 x19: ffff00000bd3c080 x18: ffff00000a266480 x17: 0000000000000000 x16: 0000000000000006 x15: 1fffe0000144cc8f x14: 0000000000000000 x13: 0000000000000004 x12: ffff700011accebf x11: 1ffff00011accebe x10: ffff700011accebe x9 : dfff800000000000 x8 : 0000000041b58ab3 x7 : ffff700011acced0 x6 : dfff800000000000 x5 : 0000000000000000 x4 : ffff800081c01aa8 x3 : 1fffe000017a7849 x2 : 1fffe000017a7835 x1 : 0000000000000000 x0 : 0000011b0e811200 Call trace: vkms_get_vblank_timestamp+0x148/0x194 drivers/gpu/drm/vkms/vkms_crtc.c:113 drm_crtc_get_last_vbltimestamp+0x140/0x184 drivers/gpu/drm/drm_vblank.c:880 drm_crtc_next_vblank_start+0x11c/0x244 drivers/gpu/drm/drm_vblank.c:1014 set_fence_deadline drivers/gpu/drm/drm_atomic_helper.c:1558 [inline] drm_atomic_helper_wait_for_fences+0x184/0x614 drivers/gpu/drm/drm_atomic_helper.c:1605 drm_atomic_helper_commit+0x170/0x2b4 drivers/gpu/drm/drm_atomic_helper.c:2034 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:1063 drm_client_modeset_commit_locked+0x108/0x3fc drivers/gpu/drm/drm_client_modeset.c:1166 drm_client_modeset_commit+0x44/0x74 drivers/gpu/drm/drm_client_modeset.c:1192 __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:257 drm_client_dev_restore+0x12c/0x214 drivers/gpu/drm/drm_client.c:260 drm_lastclose+0xc4/0x174 drivers/gpu/drm/drm_file.c:406 drm_release+0x210/0x328 drivers/gpu/drm/drm_file.c:437 __fput+0x2bc/0x95c fs/file_table.c:422 __fput_sync+0x74/0x84 fs/file_table.c:507 __do_sys_close fs/open.c:1555 [inline] __se_sys_close fs/open.c:1540 [inline] __arm64_sys_close+0x6c/0xbc fs/open.c:1540 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x6c/0x25c arch/arm64/kernel/syscall.c:48 el0_svc_common.constprop.0+0xac/0x230 arch/arm64/kernel/syscall.c:133 do_el0_svc+0x40/0x58 arch/arm64/kernel/syscall.c:152 el0_svc+0x50/0x180 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x100/0x12c arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 irq event stamp: 2826 hardirqs last enabled at (2825): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:85 [inline] hardirqs last enabled at (2825): [] exit_to_kernel_mode+0x38/0x118 arch/arm64/kernel/entry-common.c:95 hardirqs last disabled at (2826): [] el1_dbg+0x24/0x9c arch/arm64/kernel/entry-common.c:470 softirqs last enabled at (2748): [] fpsimd_restore_current_state+0x44/0xe4 arch/arm64/kernel/fpsimd.c:1805 softirqs last disabled at (2746): [] alternative_has_cap_likely arch/arm64/include/asm/alternative-macros.h:232 [inline] softirqs last disabled at (2746): [] system_supports_fpsimd arch/arm64/include/asm/cpufeature.h:734 [inline] softirqs last disabled at (2746): [] fpsimd_restore_current_state+0x14/0xe4 arch/arm64/kernel/fpsimd.c:1798 ---[ end trace 0000000000000000 ]---