Fix potential buffer overwrite.

1 files changed, 1 insertions, 1 deletions

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);