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Matthew Jordan caf4a5f605 Fix crash in chan_sip when a core initiated op occurs at the same time as a BYE ... When a BYE request is processed in chan_sip, the current SIP dialog is detached from its associated Asterisk channel structure. The tech_pvt pointer in the channel object is set to NULL, and the dialog persists for an RFC mandated period of time to handle re-transmits. While this process occurs, the channel is locked (which is good). Unfortunately, operations that are initiated externally have no way of knowing that the channel they've just obtained (which is still valid) and that they are attempting to lock is about to have its tech_pvt pointer removed. By the time they obtain the channel lock and call the channel technology callback, the tech_pvt is NULL. This patch adds a few checks to some channel callbacks that make sure the tech_pvt isn't NULL before using it. Prime offenders were the DTMF digit callbacks, which would crash if AMI initiated a DTMF on the channel at the same time as a BYE was received from the UA. This patch also adds checks on sip_transfer (as AMI can also cause a callback into this function), as well as sip_indicate (as lots of things can queue an indication onto a channel). Review: https://reviewboard.asterisk.org/r/2434/ (closes issue ASTERISK-20225) Reported by: Jeff Hoppe ........ Merged revisions 385170 from http://svn.asterisk.org/svn/asterisk/branches/1.8 ........ Merged revisions 385173 from http://svn.asterisk.org/svn/asterisk/branches/11 git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@385174 65c4cc65-6c06-0410-ace0-fbb531ad65f3		14 years ago
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h323	…
iax2	…
misdn	…
sip	AST-2013-003: Prevent username disclosure in SIP channel driver	14 years ago
Makefile	…
chan_agent.c	…
chan_alsa.c	…
chan_bridge.c	…
chan_console.c	…
chan_dahdi.c	chan_dahdi: Change inband_on_proceeding option default to no/disabled.	14 years ago
chan_gtalk.c	…
chan_h323.c	…
chan_iax2.c	Convert MWI state message type to the new stasis naming convention	14 years ago
chan_jingle.c	Set the sin_family on the bind address socket during initialization	14 years ago
chan_local.c	…
chan_mgcp.c	Convert MWI state message type to the new stasis naming convention	14 years ago
chan_misdn.c	…
chan_motif.c	…
chan_multicast_rtp.c	…
chan_nbs.c	…
chan_oss.c	…
chan_phone.c	…
chan_phone.h	…
chan_sip.c	Fix crash in chan_sip when a core initiated op occurs at the same time as a BYE	14 years ago
chan_skinny.c	Convert MWI state message type to the new stasis naming convention	14 years ago
chan_unistim.c	Convert MWI state message type to the new stasis naming convention	14 years ago
chan_vpb.cc	…
console_board.c	…
console_gui.c	…
console_video.c	…
console_video.h	…
misdn_config.c	…
sig_analog.c	…
sig_analog.h	…
sig_pri.c	chan_dahdi: Add inband_on_proceeding compatibility option.	14 years ago
sig_pri.h	chan_dahdi: Add inband_on_proceeding compatibility option.	14 years ago
sig_ss7.c	…
sig_ss7.h	…
vcodecs.c	…
vgrabbers.c	…