Red Hat Bugzilla – Bug 55185
HP-UX interaction with RedHat 7.1 lockd causes kernel oops
Last modified: 2007-04-18 12:37:48 EDT
Description of problem:
Using an HP-UX 11.0 (J6700 workstation) machine as an NFS client to a
RedHat 7.1 machine causes the RedHat machine to begin logging messages such
Oct 24 17:46:25 nas kernel: nfsd: request from insecure port
Eventually (but not necessarily immediately, or every time), this will
cause the RedHat system to get a kernel oops (in the lockd module) and lock
The problem can be fixed by adding the "insecure" option to the exports
file on the RedHat machine, but there is still the crash bug.
Steps to Reproduce:
1. Install an HP-UX 11.0 machine
2. Export a filesystem from a RedHat 7.1 server to the HP-UX machine, with
just the "rw" option, nothing special.
3. Set up the HP-UX machine to act as an NFS client to the RedHat server,
default options, nothing special.
4. Begin running programs on the HP-UX machine that use file locking.
5. On the RedHat server, you should begin receiving the "request from
insecure port" messages from nfsd/lockd.
6. After enough of them (2-3 in our case), you should see things like NFS
stop working altogether, kernel oops from lockd, and/or system crash/hang,
7.1 no longer supported. Closing.