From 1d42b3ea7ebe64c02a156043e2b3adc92458daac Mon Sep 17 00:00:00 2001
From: Alfred Klomp <git@alfredklomp.com>
Date: Mon, 14 Jul 2014 22:09:21 +0200
Subject: [PATCH] pem2der.c: fix double-free bug

Found with Clang's `scan-build` tool.

load_file() allocates memory to a char** parameter. It then tries to fread() a
file, and if that fails, frees the memory and returns to caller. However, the
char** is not reset to NULL, which causes a double-free error when the caller
later passes it to free().
---
 programs/util/pem2der.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/programs/util/pem2der.c b/programs/util/pem2der.c
index 5386fdb9c..dfd7a4966 100644
--- a/programs/util/pem2der.c
+++ b/programs/util/pem2der.c
@@ -134,6 +134,7 @@ static int load_file( const char *path, unsigned char **buf, size_t *n )
     {
         fclose( f );
         free( *buf );
+        *buf = NULL;
         return( -1 );
     }