From 05ef8c0cc005fcdf412be6819428c677f0185d33 Mon Sep 17 00:00:00 2001
From: Andre Heinecke <aheinecke@gnupg.org>
Date: Sat, 28 Oct 2023 14:20:31 +0200
Subject: [PATCH] g10: Fix uninitalized variable use in sign_file

* g10/sign.c (sign_file): Initialize gcry_md_hd_t to NULL.

--
There are several jumps to leave before gcry_md_open is called so
md should be initialized to NULL to avoid calling gcry_md_close
on an uninitalized variable.

GnuPG-Bug-Id: T6780
---
 g10/sign.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/g10/sign.c b/g10/sign.c
index f68ea3bc7..ee3fac1df 100644
--- a/g10/sign.c
+++ b/g10/sign.c
@@ -1020,7 +1020,7 @@ sign_file (ctrl_t ctrl, strlist_t filenames, int detached, strlist_t locusr,
   const char *fname;
   armor_filter_context_t *afx;
   compress_filter_context_t zfx;
-  gcry_md_hd_t md;
+  gcry_md_hd_t md = NULL;
   md_filter_context_t mfx;
   md_thd_filter_context_t mfx2 = NULL;
   text_filter_context_t tfx;