From 878c29cdc5a912e197575213c15e3dc1ffadb7ac Mon Sep 17 00:00:00 2001
From: DavidKorczynski <david@adalogics.com>
Date: Wed, 10 Mar 2021 20:23:39 +0000
Subject: [PATCH] utils: fix integer overflow (#3206)

Signed-off-by: davkor <david@adalogics.com>
---
 src/flb_utils.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/flb_utils.c b/src/flb_utils.c
index ba950eed362..ac5b0ae8d69 100644
--- a/src/flb_utils.c
+++ b/src/flb_utils.c
@@ -453,6 +453,10 @@ int64_t flb_utils_hex2int(char *hex, int len)
     char c;
 
     while ((c = *hex++) && i < len) {
+        /* Ensure no overflow */
+        if (res >= 0xccccccccccccd00) {
+            return -1;
+        }
         res *= 0x10;
 
         if (c >= 'a' && c <= 'f') {