From: Chao Yu <chao2.yu@samsung.com>
Date: Sat, 22 Mar 2014 06:59:45 +0000 (+0800)
Subject: f2fs: avoid unneeded lookup when xattr name length is too long
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=6e452d69d421e10e99446c6de16a19604149c40f;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

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>
---

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)