[Bug 1100787] Re: Samba 3.6.3 segfault or panic.

[Matt Foggin]

Had two crashes today so far and I've managed to pull some more info
from the logs and reports.

We use the squid Kerberos authentication plugin to authenticate the user
and their password, then we use the wbinfo_group.pl script to check the
users membership of an AD group. It appears that the checking for a
group stage is where winbind crashes.

Interestingly the Kerberos authentication stage carries on authenticating users properly even after the crash.
Users that have had their authentication cached by squid can carry on accessing the internet as normal for a short time. Any new authentication attempts fail.

The SID in each initial segfault report was the SID for the "Domain
Users" group. The SIDs in the following segfaults are a mix of random
groups and users, different after each crash.

The last successful user to be looked up before each crash was also
different.

After the first segfault I had to force a server restart as it became totally unresponsive. The second time I managed to kill the Winbind service and restart it. 
No other faults so far but it does seem to be a quiet period at the moment, so the server isn't under a lot of load.

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Title:
  Samba 3.6.3 segfault or panic.

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