Fix use after free bug.

Reviewed-by: Stephen Henson <steve@openssl.org>
Reviewed-by: Emilia Käsper <emilia@openssl.org>

diff --git a/crypto/x509v3/v3_utl.c b/crypto/x509v3/v3_utl.c
index 75efd9912aef29f5bd23402507b8441526210231..10a7aa876aa4ed472bc36a45377a5635e7330086 100644 (file)
--- a/crypto/x509v3/v3_utl.c
+++ b/crypto/x509v3/v3_utl.c
@@ -879,9 +879,9 @@ static int do_check_string(ASN1_STRING *a, int cmp_type, equal_fn equal,
                if (astrlen < 0)
                        return -1;
                rv = equal(astr, astrlen, (unsigned char *)b, blen, flags);
-               OPENSSL_free(astr);
                if (rv > 0 && peername)
                        *peername = BUF_strndup((char *)astr, astrlen);
+               OPENSSL_free(astr);
                }
        return rv;
        }