From: Theodore Ts'o <tytso@mit.edu>
Date: Fri, 11 Nov 2016 23:38:20 +0000 (-0500)
Subject: libext2fs: avoid dereferencing beyond allocated memory in xattr code
X-Git-Tag: 1.43.4~30
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=689b7be2da01;p=thirdparty%2Fe2fsprogs.git

libext2fs: avoid dereferencing beyond allocated memory in xattr code

Detected by ASAN.

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---

diff --git a/lib/ext2fs/ext_attr.c b/lib/ext2fs/ext_attr.c
index e8fd10c29..5eeb940d1 100644
--- a/lib/ext2fs/ext_attr.c
+++ b/lib/ext2fs/ext_attr.c
@@ -308,7 +308,7 @@ static int find_ea_index(char *fullname, char **name, int *index)
 	struct ea_name_index *e;
 
 	for (e = ea_names; e->name; e++) {
-		if (memcmp(fullname, e->name, strlen(e->name)) == 0) {
+		if (strncmp(fullname, e->name, strlen(e->name)) == 0) {
 			*name = (char *)fullname + strlen(e->name);
 			*index = e->index;
 			return 1;