f2fs: avoid unneeded lookup when xattr name length is too long

In f2fs_setxattr we have limit this attribute name length, so we should also check it in f2fs_getxattr to avoid useless lookup caused by invalid name length. Signed-off-by: Chao Yu <[email protected]> Signed-off-by: Jaegeuk Kim <[email protected]>
josf · Apr 1, 2014 · 6e452d6 · 6e452d6
1 parent df0f8dc
commit 6e452d6
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/fs/f2fs/xattr.c b/fs/f2fs/xattr.c
@@ -407,6 +407,8 @@ int f2fs_getxattr(struct inode *inode, int name_index, const char *name,
 	if (name == NULL)
 		return -EINVAL;
 	name_len = strlen(name);
+	if (name_len > F2FS_NAME_LEN)
+		return -ERANGE;
 
 	base_addr = read_all_xattrs(inode, NULL);
 	if (!base_addr)