Bail out early if we have no buf_len

ok miod@

2 files changed, 10 insertions, 2 deletions

diff --git a/src/lib/libcrypto/objects/obj_dat.c b/src/lib/libcrypto/objects/obj_dat.c
index dab860d85c..dd5d50122b 100644
--- a/src/lib/libcrypto/objects/obj_dat.c
+++ b/src/lib/libcrypto/objects/obj_dat.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: obj_dat.c,v 1.33 2015/10/14 21:12:10 tedu Exp $ */
+/* $OpenBSD: obj_dat.c,v 1.34 2015/10/14 21:25:16 beck Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -565,6 +565,10 @@ OBJ_obj2txt(char *buf, int buf_len, const ASN1_OBJECT *a, int no_name)
                         ret++;
                 }
 
+                if (buf_len <= 0) {
+                        ret = 0;
+                        goto out;
+                }
                 if (use_bn) {
                         char *bndec;
 
diff --git a/src/lib/libssl/src/crypto/objects/obj_dat.c b/src/lib/libssl/src/crypto/objects/obj_dat.c
index dab860d85c..dd5d50122b 100644
--- a/src/lib/libssl/src/crypto/objects/obj_dat.c
+++ b/src/lib/libssl/src/crypto/objects/obj_dat.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: obj_dat.c,v 1.33 2015/10/14 21:12:10 tedu Exp $ */
+/* $OpenBSD: obj_dat.c,v 1.34 2015/10/14 21:25:16 beck Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -565,6 +565,10 @@ OBJ_obj2txt(char *buf, int buf_len, const ASN1_OBJECT *a, int no_name)
                         ret++;
                 }
 
+                if (buf_len <= 0) {
+                        ret = 0;
+                        goto out;
+                }
                 if (use_bn) {
                         char *bndec;