res_calendar: Protect channel when adding datastore.

This change adds a missing channel lock when adding a datastore
to a channel.
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Merged revisions 404135 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 404136 from http://svn.asterisk.org/svn/asterisk/branches/11
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Merged revisions 404137 from http://svn.asterisk.org/svn/asterisk/branches/12

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@404138 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/res/res_calendar.c b/res/res_calendar.c
index dfae4985a3ac21eacd4eb6aecd2215bf88fc8735..eebd7b480e06f452f9431592149f2be07073ecda 100644 (file)
--- a/res/res_calendar.c
+++ b/res/res_calendar.c
@@ -775,7 +775,10 @@ static void *do_notify(void *data)
        datastore->inheritance = DATASTORE_INHERIT_FOREVER;
 
        ao2_ref(event, +1);
+
+       ast_channel_lock(chan);
        res = ast_channel_datastore_add(chan, datastore);
+       ast_channel_unlock(chan);
 
        if (!(tmpstr = ast_str_create(32))) {
                goto notify_cleanup;