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 <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/fs/f2fs/xattr.c b/fs/f2fs/xattr.c
index 0121e4595ccd..503c2451131e 100644
--- 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)