AST-2021-006 - res_pjsip_t38.c: Check for session_media on reinvite.
When Asterisk sends a reinvite negotiating T38 faxing, it's possible a crash can occur if the response contains a m=image and zero port. The reinvite callback code now checks session_media to see if it is null or not before trying to access the udptl variable on it. ASTERISK-29305 Change-Id: I1dfc51c5fa586e38579ede4bc228edee213ccaa9
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@ -325,7 +325,7 @@ static int t38_reinvite_response_cb(struct ast_sip_session *session, pjsip_rx_da
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* If there is a session_media object, but no udptl object available
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* then it's assumed the stream was declined.
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*/
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if (!session_media->udptl) {
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if (session_media && !session_media->udptl) {
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session_media = NULL;
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}
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