scripts: on fail realloc function does not free orig res but null it

When a fail occurs, realloc function does null res, but does not free the original res. Signed-off-by: BELOUARGA Mohamed <[email protected]>
sbabic · Feb 7, 2024 · 90c6db1 · 90c6db1
1 parent 7be4bca
commit 90c6db1
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/scripts/kconfig/symbol.c b/scripts/kconfig/symbol.c
@@ -873,6 +873,7 @@ const char *sym_expand_string_value(const char *in)
 {
 	const char *src;
 	char *res;
+	char *tmp_res;
 	size_t reslen;
 
 	reslen = strlen(in) + 1;
@@ -902,7 +903,10 @@ const char *sym_expand_string_value(const char *in)
 		newlen = strlen(res) + strlen(symval) + strlen(src) + 1;
 		if (newlen > reslen) {
 			reslen = newlen;
-			res = realloc(res, reslen);
+			tmp_res = realloc(res, reslen);
+			if (!tmp_res)
+				free(res);
+			res = tmp_res;
 		}
 
 		strcat(res, symval);