From f73f40c97aeabe1e164f9cf4995acec99a12ccdd Mon Sep 17 00:00:00 2001
From: Richard Russon <rich@flatcap.org>
Date: Wed, 17 Jan 2018 13:46:43 +0000
Subject: [PATCH] negative check

---
 ncrypt/crypt_gpgme.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/ncrypt/crypt_gpgme.c b/ncrypt/crypt_gpgme.c
index 012a70caf..3cad2bd3a 100644
--- a/ncrypt/crypt_gpgme.c
+++ b/ncrypt/crypt_gpgme.c
@@ -1801,6 +1801,8 @@ static struct Body *decrypt_part(struct Body *a, struct State *s, FILE *fpout,
   ctx = create_gpgme_context(is_smime);
 
 restart:
+  if (a->length < 0)
+    return NULL;
   /* Make a data object from the body, create context etc. */
   ciphertext = file_to_data_object(s->fpin, a->offset, a->length);
   if (!ciphertext)
-- 
2.49.0