huor commented on a change in pull request #1458: HAWQ-1729.fix memory wrong
usage
URL: https://github.com/apache/hawq/pull/1458#discussion_r306109817
##########
File path: src/backend/libpq/auth.c
##########
@@ -383,12 +383,19 @@ internal_client_authentication(Port *port)
/*
* Internal connection via a domain socket -- use ident
*/
- char *local_name;
+ char local_name[IDENT_USERNAME_MAX + 1];
char remote_name[IDENT_USERNAME_MAX + 1];
struct passwd *pw;
pw = getpwuid(geteuid());
- local_name = pw->pw_name;
+
+ /*
+ * copy local name out because another getpwuid call is
performed in
+ * ident_unix(), which causes memory freed referenced
by pw
+ */
+
+ local_name[IDENT_USERNAME_MAX + 1] = 0;
Review comment:
local_name[IDENT_USERNAME_MAX] = '\0';
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