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The callback should never be called before an immediate return. The callback might reply to a control and the caller of ctdb_event_script_callback_v() may not have assigned/stolen the pointer to control structure into the private data. Therefore, calling the callback can dereference an uninitialised pointer to the control structure when attempting to reply. ctdb_event_script_callback_v() must succeed when there are no event scripts. On success the caller will mark the call as asynchronous and expect the callback to be called. Given that it can't be called before return then it needs to be scheduled. BUG: https://bugzilla.samba.org/show_bug.cgi?id=12180 Signed-off-by: Martin Schwenke <martin@meltin.net> Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This is the release version of CTDB, a clustered implementation of TDB database used by Samba and other projects to store temporary data. This software is freely distributable under the GNU public license, a copy of which you should have received with this software (in a file called COPYING). For documentation on CTDB, please visit CTDB website http://ctdb.samba.org.