Prevent negative array index in getMetaRefreshParam()

Bug-Debian: https://github.com/tats/w3m/issues/63
2016-12-05 00:31:34 +09:00
parent d57c13282a
commit 6c6a2cbced
1 changed files with 3 additions and 2 deletions
@@ -4378,8 +4378,9 @@ getMetaRefreshParam(char *q, Str *refresh_uri)
 		r++;
 	    s_tmp = Strnew_charp_n(q, r - q);

-	    if (s_tmp->ptr[s_tmp->length - 1] == '\"'          /* " */
-	       || s_tmp->ptr[s_tmp->length - 1] == '\'') {     /* ' */
+	    if (s_tmp->length > 0 &&
+	        (s_tmp->ptr[s_tmp->length - 1] == '\"' ||	/* " */
+		 s_tmp->ptr[s_tmp->length - 1] == '\'')) {	/* ' */
 		s_tmp->length--;
 		s_tmp->ptr[s_tmp->length] = '\0';
 	    }