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(ITS#6745) HEAD emfile race condition -> slapd stopping listening?
Full_Name: Hallvard B Furuseth
Submission from: (NULL) (220.127.116.11)
Submitted by: hallvard
In HEAD slapd/daemon.c, thanks to HEAD's multiple listener support:
slap_listener() protects emfile with slap_daemon[0 ].sd_mutex,
but slapd_remove() protects it with slap_daemon[id].sd_mutex.
Maybe to compensate, slapd_remove() has code which checks if emfile
is too big, but nothing checks if it is too small - which looks like
slapd might never start listening again.
Simplest fix: add this to slapd_remove():
if (id) ldap_pvt_thread_mutex_<lock,unlock>( &slap_daemon.sd_mutex );
slap_daemon.sd_mutex looks quite contended that way, though.
Maybe a separate emfile_mutex is better.