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pbx.c: Pre-initialize timezone to avoid crash on destroy

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In ast_build_timing, initialize the timezone value to NULL
in order to avoid deferencing an uninitialized value later
when calling ast_destroy_timing.  The timezone value could
be uninitialized if ast_build_timing were to fail due to a
zero length time string.

(closes issue ASTERISK-22861)
Reported by: Sebastian Murray-Roberts
Review: https://reviewboard.asterisk.org/r/3134/
Patches:
     ast_build_timing-initialize-timezone.patch uploaded by coreyfarrell (license 5909)
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Merged revisions 406241 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 406245 from http://svn.asterisk.org/svn/asterisk/branches/11
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Merged revisions 406264 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@406269 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Scott Griepentrog
2014-01-22 22:24:39 +00:00
parent 3e6c4a6f89
commit 64e2e1d5d8
2 changed files with 4 additions and 4 deletions
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4
utils/extconf.c
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@@ -4453,6 +4453,8 @@ int ast_build_timing(struct ast_timing *i, const char *info_in)
char *info;
int j, num_fields, last_sep = -1;
i->timezone = NULL;
/* Check for empty just in case */
if (ast_strlen_zero(info_in)) {
return 0;
@@ -4472,8 +4474,6 @@ int ast_build_timing(struct ast_timing *i, const char *info_in)
/* save the timezone, if it is specified */
if (num_fields == 5) {
i->timezone = ast_strdup(info + last_sep + 1);
} else {
i->timezone = NULL;
}
/* Assume everything except time */