X-Git-Url: https://wimlib.net/git/?a=blobdiff_plain;f=src%2Fmount_image.c;h=b00a2a686c28bcb7cebb67f97f4d18d562bb8187;hb=14b6656962ad607e3ab45a3ccbc57464ff4a6c6f;hp=785620197c857492f30cf83b1c63e4af15e2a178;hpb=5873df008e648b9646b07c7d4eeda511adf92e28;p=wimlib

diff --git a/src/mount_image.c b/src/mount_image.c
index 78562019..b00a2a68 100644
--- a/src/mount_image.c
+++ b/src/mount_image.c
@@ -2024,10 +2024,16 @@ wimfs_readlink(const char *path, char *buf, size_t buf_len)
 		return -errno;
 	if (!inode_is_symlink(inode))
 		return -EINVAL;
-
-	ret = inode_readlink(inode, buf, buf_len, ctx->wim, true);
-	if (ret > 0)
+	if (buf_len == 0)
+		return -ENAMETOOLONG;
+	ret = inode_readlink(inode, buf, buf_len - 1, ctx->wim, true);
+	if (ret >= 0) {
+		wimlib_assert(ret <= buf_len - 1);
+		buf[ret] = '\0';
 		ret = 0;
+	} else if (ret == -ENAMETOOLONG) {
+		buf[buf_len - 1] = '\0';
+	}
 	return ret;
 }