res_calendar: Protect channel when adding datastore.

This change adds a missing channel lock when adding a datastore
to a channel.
........

Merged revisions 404135 from http://svn.asterisk.org/svn/asterisk/branches/1.8

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/11@404136 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/res/res_calendar.c b/res/res_calendar.c
index b60d8234d9501754d17a8bfcfc32a8ea7c760063..0ec032cf99e31a405131537a935e4e61d0412e3b 100644 (file)
--- a/res/res_calendar.c
+++ b/res/res_calendar.c
@@ -766,7 +766,10 @@ 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;