Summary:	ASTERISK-27956: res_pjsip_pubsub: segfault in function publish_expire
Reporter:	Alexei Gradinari (alexei gradinari)	Labels:	pjsip
Date Opened:	2018-07-06 15:04:43	Date Closed:	2018-07-10 06:30:03
Priority:	Major	Regression?
Status:	Closed/Complete	Components:	Resources/res_pjsip_pubsub
Versions:	13.21.0 15.4.1	Frequency of Occurrence
Related Issues:
Environment:		Attachments:
Description:	The function pubsub_on_rx_publish_request incorrectly uses of AST_SCHED_REPLACE_UNREF. The AST_SCHED_REPLACE_UNREF should unref old '_data'. Because of this, there may be a double unref of variable 'publication' when ast_sched_del is unsuccessful that leads to use after free of the 'publication' in publish_expire.
Comments:	By: Asterisk Team (asteriskteam) 2018-07-06 15:04:45.079-0500 Thanks for creating a report! The issue has entered the triage process. That means the issue will wait in this status until a Bug Marshal has an opportunity to review the issue. Once the issue has been reviewed you will receive comments regarding the next steps towards resolution. A good first step is for you to review the [Asterisk Issue Guidelines|https://wiki.asterisk.org/wiki/display/AST/Asterisk+Issue+Guidelines] if you haven't already. The guidelines detail what is expected from an Asterisk issue report. Then, if you are submitting a patch, please review the [Patch Contribution Process|https://wiki.asterisk.org/wiki/display/AST/Patch+Contribution+Process]. By: Friendly Automation (friendly-automation) 2018-07-10 06:30:03.725-0500 Change 9351 merged by Jenkins2: res_pjsip_pubsub: segfault in function publish_expire [https://gerrit.asterisk.org/9351|https://gerrit.asterisk.org/9351] By: Friendly Automation (friendly-automation) 2018-07-10 06:51:05.644-0500 Change 9372 merged by Jenkins2: res_pjsip_pubsub: segfault in function publish_expire [https://gerrit.asterisk.org/9372|https://gerrit.asterisk.org/9372] By: Friendly Automation (friendly-automation) 2018-07-10 06:52:36.913-0500 Change 9371 merged by Joshua Colp: res_pjsip_pubsub: segfault in function publish_expire [https://gerrit.asterisk.org/9371|https://gerrit.asterisk.org/9371]