I found a workaround that shuts libnss up; the following settings in
/etc/ldap.conf were:
nss_initgroups_minimum_uid 0
nss_initgroups_ignoreusers root
I changed:
nss_initgroups_minimum_uid 30
then used usermodify to shuffle the syslog user uid (it was 120ish):
usermodify -u14 syslog
groupmodify -g14 syslog
I then re-populated nss_initgroups_ignore_users using:
service libnss-ldap restart
giving:
nss_initgroups_ignoreusers
bin,daemon,games,lp,mail,man,news,proxy,root,sync,sys,syslog,uucp
This shut libnss_ldap up and stopped the log from hanging.
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https://bugs.launchpad.net/bugs/1414507
Title:
rsyslog hangs if setuid during logging process causes further logging
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