Fixed #1535: Pending outgoing TCP transmission may cause crash if the library is shutdown

git-svn-id: http://svn.pjsip.org/repos/pjproject/trunk@4165 74dad513-b988-da41-8d7b-12977e46ad98

1 files changed, 5 insertions, 1 deletions

diff --git a/pjsip/src/pjsip/sip_transaction.c b/pjsip/src/pjsip/sip_transaction.c
index 0ef1f4d2..3560b775 100644
--- a/pjsip/src/pjsip/sip_transaction.c
+++ b/pjsip/src/pjsip/sip_transaction.c
@@ -1737,8 +1737,12 @@ static void send_msg_callback( pjsip_send_state *send_state,
 
     /* Check if transaction has cancelled itself from this transmit
      * notification (https://trac.pjsip.org/repos/ticket/1033).
+     * Also check if the transaction layer itself may have been shutdown
+     * (https://trac.pjsip.org/repos/ticket/1535)
      */
-    if (tdata->mod_data[mod_tsx_layer.mod.id] == NULL) {
+    if (mod_tsx_layer.mod.id < 0 ||
+	tdata->mod_data[mod_tsx_layer.mod.id] == NULL)
+    {
 	*cont = PJ_FALSE;
 	return;
     }