[Asterisk-code-review] app voicemail: Fix stack overrun in append mailbox (asterisk[16.0])

[George Joseph]

Hello Jenkins2, 

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

    https://gerrit.asterisk.org/10238

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

Change subject: app_voicemail:  Fix stack overrun in append_mailbox
......................................................................

app_voicemail:  Fix stack overrun in append_mailbox

The append_mailbox function wasn't calculating the correct length
to pass to ast_alloca and it wasn't handling the case where context
might be empty.

Found by the Address Sanitizer.

Change-Id: I7eb51c7bd18a7a8dbdba261462a95cc69e84f161
---
M apps/app_voicemail.c
1 file changed, 12 insertions(+), 7 deletions(-)


  git pull ssh://gerrit.asterisk.org:29418/asterisk refs/changes/38/10238/3
-- 
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Gerrit-Project: asterisk
Gerrit-Branch: 16.0
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I7eb51c7bd18a7a8dbdba261462a95cc69e84f161
Gerrit-Change-Number: 10238
Gerrit-PatchSet: 3
Gerrit-Owner: George Joseph <gjoseph at digium.com>
Gerrit-Reviewer: Jenkins2
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