In DSO_up_ref(), check return value of CRYPTO_add() and report

failure accordingly.

ok jsing

1 files changed, 5 insertions, 3 deletions

diff --git a/src/lib/libcrypto/dso/dso_lib.c b/src/lib/libcrypto/dso/dso_lib.c
index 7902fbcc6e..6dc98803ec 100644
--- a/src/lib/libcrypto/dso/dso_lib.c
+++ b/src/lib/libcrypto/dso/dso_lib.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: dso_lib.c,v 1.19 2017/01/29 17:49:23 beck Exp $ */
+/* $OpenBSD: dso_lib.c,v 1.20 2018/08/24 19:27:01 tb Exp $ */
 /* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
  * project 2000.
  */
@@ -174,13 +174,15 @@ DSO_flags(DSO *dso)
 int
 DSO_up_ref(DSO *dso)
 {
+        int refs;
+
         if (dso == NULL) {
                 DSOerror(ERR_R_PASSED_NULL_PARAMETER);
                 return (0);
         }
 
-        CRYPTO_add(&dso->references, 1, CRYPTO_LOCK_DSO);
-        return (1);
+        refs = CRYPTO_add(&dso->references, 1, CRYPTO_LOCK_DSO);
+        return ((refs > 1) ? 1 : 0);
 }
 
 DSO *