fchmodat(0xffffffffffffffff, 0x0, 0x0)
syz_mount_image$vfat(0x0, &(0x7f00000000c0)='./file0\x00', 0x0, 0x0, 0x0, 0x0, 0x0)
syz_open_dev$evdev(0x0, 0x0, 0x0)
ioctl$BTRFS_IOC_INO_LOOKUP_USER(0xffffffffffffffff, 0xd000943e, 0x0)
mount$9p_fd(0x0, &(0x7f0000005180)='./file0\x00', &(0x7f00000051c0), 0x0, &(0x7f00000053c0)={'trans=fd,', {}, 0x2c, {}, 0x2c, {[{@msize}, {@version_9p2000}], [{@subj_user={'subj_user', 0x3d, '\x00'}}]}})