From a959f4717e551252bdce48e7227e6737cc3ce80d Mon Sep 17 00:00:00 2001
From: wolfbeast <mcwerewolf@gmail.com>
Date: Thu, 13 Dec 2018 22:15:37 +0100
Subject: [PATCH] Prevent double free in mar_sign.c

---
 modules/libmar/sign/mar_sign.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/modules/libmar/sign/mar_sign.c b/modules/libmar/sign/mar_sign.c
index 84319651db..182f387d92 100644
--- a/modules/libmar/sign/mar_sign.c
+++ b/modules/libmar/sign/mar_sign.c
@@ -534,6 +534,7 @@ extract_signature(const char *src, uint32_t sigIndex, const char * dest)
   for (i = 0; i <= sigIndex; i++) {
     /* Avoid leaking while skipping signatures */
     free(extractedSignature);
+    extractedSignature = NULL;
 
     /* skip past the signature algorithm ID */
     if (fseeko(fpSrc, sizeof(uint32_t), SEEK_CUR)) {