Bug 452430

What is the version of setroubleshoot? Versions less than 2.x can produce
excessive alerts in some situations.

setroubleshoot-2.0.5-2.fc8

Update: the system became totally catatonic within 2 hours and to be rebooted
with selinux disabled completely to get any user service back.

I do have the massive log files, but doubt I can upload them - they're massive.
 Is there any kind of grep I can perform on them that will help diagnose what
caused this problem.

I guess the key observations are:
1. doing the /.autorelabel suggested by sealert definitely made things much
worse than it had been.
2. sealert should probably detect just how many errors it's been reporting and
drop itself out of the loop after maybe a couple of hundred similar events in
quick succession - a "last message repeated 8,000 times" kind of response rather
than trying to queue that many notifications which seems likely the way it got
to 26 minutes CPU time in 1hr 20m uptime.

Hope that helps...

Regards, Bevis.

You should be fine with this version, I suspect there are other issues going on.
setroubleshoot does (or should) aggregate identical alerts into a single alert
(incrementing the alert's report count). setroubleshoot should also truncate
unique alerts to a maximum of 50.

I sounds like you've got a situation where you're constantly getting denials
(denials are reported in permissive mode). setroubleshoot still has to run to
determine the current denial is identical to a previous denial so even if
setroubleshoot is correctly coalescing these into a single alert it is going to
consume resources.

You have two choices, turn off setroubleshoot (service setroubleshoot stop or
chkconfig setroubleshoot off), or better yet fix the problem it's trying to warn
you about. Open the sealert browser (Applications-->System Tools-->SELinux
Troubleshooter) and look for alerts with high alert counts (or click on the
report count column to sort by report count). Then figure out why you're getting
that denial so frequently. We can help you here, after you identify the alert
with the high count use (Edit-->Copy Alert) to put the alert on the clipboard
and paste it into this bugzilla.

Re, large log files, you don't specify which log files you're talking about, the
audit log file should be large in this instance, but not the setroubleshoot log
file (/var/log/setroubleshoot/setroubleshootd.log) unless it's continuously
faulting and writing tracebacks into the log file, is it?

OK, I think I've tracked down where there problem is.  This is actually to do
with a memory leak in the NFS mountd code, the rpc.mountd does this about 20,000
times per mount request:

ioctl(9, DM_TABLE_DEPS, 0x7fd62ddc6490) = 0
ioctl(9, DM_TABLE_DEPS, 0x7fd62ddc6490) = 0
ioctl(9, DM_TABLE_DEPS, 0x7fd62ddc6490) = 0
ioctl(9, DM_TABLE_DEPS, 0x7fd62ddc6490) = 0
ioctl(9, DM_TABLE_DEPS, 0x7fd62ddc6490) = 0
ioctl(9, DM_TABLE_DEPS, 0x7fd62ddc6490) = 0
ioctl(9, DM_TABLE_DEPS, 0x7fd62ddc6490) = 0
ioctl(9, DM_TABLE_DEPS, 0x7fd62ddc6490) = 0
ioctl(9, DM_TABLE_DEPS, 0x7fd62ddc6490) = 0
ioctl(9, DM_TABLE_DEPS, 0x7fd62ddc6490) = 0

Doing some research this seems to be covered by debian bug:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=413661

and:
http://linux-nfs.org/pipermail/nfsv4/2007-July/006339.html

The discussions pointed to above seem to indicate that the bug was fixed in
e2fsprogs 1.40 and nfs-kernel-server 1.0.12.  I'm not sure where that leaves
Fedora 8.

I can understand that my situation may be extreme as the system has three Linux
software RAID devices, each producing a volume group, with a total of about 40
logical volumes defined.  Do a device manager rescan and you'll pretty much
disappear under the load.

Any thoughts on this?

Regards, Bevis.

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