b2b_entities: free key returned by client_new

prevent pkg leak of b2b_key returned by client_new

(cherry picked from commit 60043ae)

modules/b2b_entities/dlg.c

@@ -260,6 +260,7 @@ str* b2b_htable_insert(b2b_table table, b2b_dlg_t* dlg, int hash_index,
 			LM_ERR("No more shared memory\n");
 			if(!safe)
 				lock_release(&table[hash_index].lock);
+			pkg_free(b2b_key);
 			return 0;
 		}
 		memcpy(dlg->tag[CALLEE_LEG].s, b2b_key->s, b2b_key->len);

modules/b2b_sdp_demux/b2b_sdp_demux.c

@@ -1634,9 +1634,11 @@ static int b2b_sdp_demux_start(struct sip_msg *msg, str *uri,
 		if (shm_str_dup(&client->b2b_key, b2b_key) < 0) {
 			LM_ERR("could not copy b2b client key\n");
 			/* key is not yet stored, but INVITE sent - terminate it */
+			pkg_free(b2b_key);
 			b2b_sdp_client_terminate(client, b2b_key);
 			return -1;
 		}
+		pkg_free(b2b_key);
 	}
 
 	return 0;

modules/media_exchange/media_exchange.c

@@ -331,8 +331,10 @@ static int handle_media_fork_to_uri(struct media_session_leg *msl, struct socket
 		LM_ERR("could not copy b2b client key\n");
 		/* key is not yet stored, so cannot be deleted */
 		media_b2b.entity_delete(B2B_CLIENT, b2b_key, msl->dlginfo, 1, 1);
+		pkg_free(b2b_key);
 		goto destroy;
 	}
+	pkg_free(b2b_key);
 	msl->b2b_entity = B2B_CLIENT;
 	return 1;
 destroy:
@@ -618,8 +620,10 @@ static int handle_media_exchange_from_uri(struct socket_info *si, struct dlg_cel
 		LM_ERR("could not copy b2b client key\n");
 		/* key is not yet stored, so cannot be deleted */
 		media_b2b.entity_delete(B2B_CLIENT, b2b_key, msl->dlginfo, 1, 1);
+		pkg_free(b2b_key);
 		goto unref;
 	}
+	pkg_free(b2b_key);
 	msl->b2b_entity = B2B_CLIENT;
 	return 1;
 unref:

modules/siprec/siprec_logic.c

@@ -464,10 +464,12 @@ static int srs_send_invite(struct src_sess *sess)
 	sess->b2b_key.s = shm_malloc(client->len);
 	if (!sess->b2b_key.s) {
 		LM_ERR("out of shm memory!\n");
+		pkg_free(client);
 		return -1;
 	}
 	memcpy(sess->b2b_key.s, client->s, client->len);
 	sess->b2b_key.len = client->len;
+	pkg_free(client);
 
 	return 0;
 }