Red Hat Bugzilla – Bug 133381
cat /proc/net/ip_conntrack produce kernel panic
Last modified: 2014-06-18 04:28:32 EDT
Description of problem:
cat /proc/net/ip_conntrack produce a kernel panic
Version-Release number of selected component (if applicable):
produce a kernel panic
but not always (unfortunately it's our production firewall) and we
inmediately reboot the server since it's not allowed to stop:-(
Steps to Reproduce:
kernel panic after a few hundred lines
all lines are produced
it's a server with four ethernet card and a huge iptables firewall
(generated by shorewall). anyway the whole system working properly.
Without a OOPS trace there is no way I can possibly
debug this problem.
I'm seeing kernel panics myself. If I run a script in cron that greps
/proc/net/ip_conntrack every few minutes, I get panics about once a week.
There's a bug entry at osdl.org:
And a mailing list posting to netfilter-devel:
As far as I know these only apply to the 2.4.26 source, and the
function destroy_conntrack is different enough in my kernel (RH9
2.4.20-8) I don't know how to apply the patch.
See also this netfilter bug entry:
I have just seen this panic on a RHEL3 U5 box, kernel-2.4.21-32.0.1.EL. I have
seen this back in the RH 7.x days but it's unfortunately it still happens with
the latest RHEL3 kernel.
We're still waiting for the oops output.
we no longer use rhel 3 we update all of our server to rhel 4 and no longer get
the kernel panic. but just look at the above osdl bugzilla entry.
This bug is filed against RHEL 3, which is in maintenance phase.
During the maintenance phase, only security errata and select mission
critical bug fixes will be released for enterprise products. Since
this bug does not meet that criteria, it is now being closed.
For more information of the RHEL errata support policy, please visit:
If you feel this bug is indeed mission critical, please contact your
support representative. You may be asked to provide detailed
information on how this bug is affecting you.