[Asterisk-code-review] chan_sip: Fix crash when accessing RURI before initiating outgoing call (asterisk[master])

[N A]

Hello Friendly Automation, 

I'd like you to reexamine a change. Please visit

    https://gerrit.asterisk.org/c/asterisk/+/17583

to look at the new patch set (#3).

Change subject: chan_sip: Fix crash when accessing RURI before initiating outgoing call
......................................................................

chan_sip: Fix crash when accessing RURI before initiating outgoing call

Attempting to access ${CHANNEL(ruri)} in a pre-dial handler before
initiating an outgoing call will cause Asterisk to crash. This is
because a null field is accessed, resulting in an offset from null and
subsequent memory access violation.

Since RURI is not guaranteed to exist, we now check if the base
pointer is non-null before calculating an offset.

ASTERISK-29772

Change-Id: Icd3b02f07256bbe6615854af5717074087b95a83
---
M channels/sip/dialplan_functions.c
1 file changed, 6 insertions(+), 2 deletions(-)


  git pull ssh://gerrit.asterisk.org:29418/asterisk refs/changes/83/17583/3
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Gerrit-Project: asterisk
Gerrit-Branch: master
Gerrit-Change-Id: Icd3b02f07256bbe6615854af5717074087b95a83
Gerrit-Change-Number: 17583
Gerrit-PatchSet: 3
Gerrit-Owner: N A <mail at interlinked.x10host.com>
Gerrit-Reviewer: Friendly Automation
Gerrit-MessageType: newpatchset
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