static int change_mount_flags(struct vfsmount *mnt, int ms_flags)
{
	int error = 0;
	int readonly_request = 0;

	if (ms_flags & MS_RDONLY)
		readonly_request = 1;
	if (readonly_request == __mnt_is_readonly(mnt))
		return 0;

	if (mnt->mnt_flags & MNT_LOCK_READONLY)
		return -EPERM;

	if (readonly_request)
		error = mnt_make_readonly(real_mount(mnt));
	else
		__mnt_unmake_readonly(real_mount(mnt));
	return error;
}

This category addresses vulnerabilities caused by flawed access control mechanisms, where incorrect permission settings allow unauthorized users to access restricted resources.