X-Git-Url: https://git.openssl.org/gitweb/?a=blobdiff_plain;f=crypto%2Fbio%2Fb_sock.c;h=dc14a1b587059277cf979d95b7a43adf5f09b338;hb=ad9a05621ac75b6b9db1e8856d7f434276b1a7af;hp=071acda48e83e6fdbbaffa9b4f68c89ed44bc40b;hpb=d5975c8d5a171551dd42ffa18ca12e84f29ad106;p=openssl.git

diff --git a/crypto/bio/b_sock.c b/crypto/bio/b_sock.c
index 071acda48e..dc14a1b587 100644
--- a/crypto/bio/b_sock.c
+++ b/crypto/bio/b_sock.c
@@ -311,10 +311,20 @@ int BIO_accept(int sock, char **ip_port)
     if (ip_port != NULL) {
         char *host = BIO_ADDR_hostname_string(&res, 1);
         char *port = BIO_ADDR_service_string(&res, 1);
-        *ip_port = OPENSSL_zalloc(strlen(host) + strlen(port) + 2);
-        strcpy(*ip_port, host);
-        strcat(*ip_port, ":");
-        strcat(*ip_port, port);
+        if (host != NULL && port != NULL)
+            *ip_port = OPENSSL_zalloc(strlen(host) + strlen(port) + 2);
+        else
+            *ip_port = NULL;
+
+        if (*ip_port == NULL) {
+            BIOerr(BIO_F_BIO_ACCEPT, ERR_R_MALLOC_FAILURE);
+            BIO_closesocket(ret);
+            ret = (int)INVALID_SOCKET;
+        } else {
+            strcpy(*ip_port, host);
+            strcat(*ip_port, ":");
+            strcat(*ip_port, port);
+        }
         OPENSSL_free(host);
         OPENSSL_free(port);
     }