Btrfs: add extra sanity checks on the path names in btrfs_mksubvol (16780cab) · Commits · e / devices / android_kernel_fairphone_FP4

fs/btrfs/ioctl.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -1333,6 +1333,12 @@ static noinline int btrfs_ioctl_snap_create_transid(struct file *file,
		goto out;
		}

		if (name[0] == '.' &&
		(namelen == 1 \|\| (name[1] == '.' && namelen == 2))) {
		ret = -EEXIST;
		goto out;
		}

		if (subvol) {
		ret = btrfs_mksubvol(&file->f_path, name, namelen,
		NULL, transid, readonly);