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Fix dialplan function NULL channel safety issues

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(closes issue ASTERISK-23391)
Reported by: Corey Farrell
Review: https://reviewboard.asterisk.org/r/3386/
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Merged revisions 411313 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 411314 from http://svn.asterisk.org/svn/asterisk/branches/11
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Merged revisions 411315 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@411328 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Corey Farrell
2014-03-27 19:21:44 +00:00
parent 44409401ec
commit fbe0dfaf44
31 changed files with 315 additions and 30 deletions
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5
funcs/func_math.c
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@@ -392,6 +392,11 @@ static int crement_function_read(struct ast_channel *chan, const char *cmd,
return -1;
}
if (!chan) {
ast_log(LOG_WARNING, "No channel was provided to %s function.\n", cmd);
return -1;
}
ast_channel_lock(chan);
if (!(var = pbx_builtin_getvar_helper(chan, data))) {