check the sigbuf value before using it.

ok miod@ (thanks).

1 files changed, 7 insertions, 2 deletions

diff --git a/src/usr.bin/openssl/dgst.c b/src/usr.bin/openssl/dgst.c
index 655b2083d0..c9ac057d01 100644
--- a/src/usr.bin/openssl/dgst.c
+++ b/src/usr.bin/openssl/dgst.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: dgst.c,v 1.2 2015/07/20 17:10:45 doug Exp $ */
+/* $OpenBSD: dgst.c,v 1.3 2015/07/20 18:23:52 rpointel Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -393,9 +393,14 @@ mac_end:
 
         if (sigfile && sigkey) {
                 BIO *sigbio;
-                sigbio = BIO_new_file(sigfile, "rb");
                 siglen = EVP_PKEY_size(sigkey);
                 sigbuf = malloc(siglen);
+                if (sigbuf == NULL) {
+                        BIO_printf(bio_err, "out of memory\n");
+                        ERR_print_errors(bio_err);
+                        goto end;
+                }
+                sigbio = BIO_new_file(sigfile, "rb");
                 if (!sigbio) {
                         BIO_printf(bio_err, "Error opening signature file %s\n",
                             sigfile);