From e763cfbf76e733028ca4f996d94bb96317732ad9 Mon Sep 17 00:00:00 2001
From: RainRat <rainrat78@yahoo.ca>
Date: Fri, 17 Nov 2023 18:00:00 -0800
Subject: [PATCH] Update allow_list.c

potential memory leak https://github.com/Cisco-Talos/clamav/issues/1092
---
 clamav-milter/allow_list.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/clamav-milter/allow_list.c b/clamav-milter/allow_list.c
index 09f37ff560..fed7ff512a 100644
--- a/clamav-milter/allow_list.c
+++ b/clamav-milter/allow_list.c
@@ -157,12 +157,14 @@ int smtpauth_init(const char *r)
             if (len <= 0) continue;
             if (len * 3 + 1 > rxavail) {
                 ptr   = regex;
-                regex = realloc(regex, rxsize + 2048);
-                if (!regex) {
+                char *temp = realloc(regex, rxsize + 2048);
+                if (!temp) {
+                    free(regex);
                     logg(LOGG_ERROR, "Cannot allocate memory for SkipAuthenticated file\n");
                     fclose(f);
                     return 1;
                 }
+                regex = temp;
                 rxavail = 2048;
                 rxsize += 2048;
                 if (!ptr) {