(ITS#5595) bdb deadlock if add causes modify

Full_Name: Rein Tollevik Version: CVS head OS: linux and solaris URL: Submission from: (NULL) (81.93.160.250) Submitted by: rein

A deadlock occur in bdb_cache_modify() when it calls bdb_cache_entry_db_relock() if adding an entry triggers a modify of the same entry. Seen by adding the suffix entry of a backend with the syncprov overlay and syncprov-checkpoint set to "1 1", i.e the add causes syncprov_checkpoint() to be called.

The problem is that bdb_add() calls send_ldap_result() while the entry is locked. But I'm not sure whether releasing the entry before it is done is correct or not. Nor if this should be considered a usage bug in the first place...

Rein Tollevik Basefarm AS