From: Carl Hetherington <cth@carlh.net>
Date: Sun, 19 Jun 2022 20:52:28 +0000 (+0200)
Subject: Fix potential buffer overwrite.
X-Git-Url: https://git.carlh.net/gitweb/?a=commitdiff_plain;h=b4d9787f0fd3fbe529ee5ba02c8bcadd3b5e54e2;p=lwext4.git

Fix potential buffer overwrite.
---

diff --git a/src/ext4_mkfs.c b/src/ext4_mkfs.c
index c6b8938..4ff2f75 100644
--- a/src/ext4_mkfs.c
+++ b/src/ext4_mkfs.c
@@ -264,7 +264,7 @@ static void fill_sb(struct fs_aux_info *aux_info, struct ext4_mkfs_info *info)
 	memcpy(sb->uuid, info->uuid, UUID_SIZE);
 
 	memset(sb->volume_name, 0, sizeof(sb->volume_name));
-	strncpy(sb->volume_name, info->label, sizeof(sb->volume_name));
+	strncpy(sb->volume_name, info->label, sizeof(sb->volume_name) - 1);
 	memset(sb->last_mounted, 0, sizeof(sb->last_mounted));
 
 	sb->algorithm_usage_bitmap = to_le32(0);