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Created attachment 474201[details]
patch for linux-2.6.32-71.el6.x86_64
Description of problem:
When mounting NFSv4 filesystem, NFS client's kernel panic for a BUG_ON at
__rpc_create_common().
The panic place is:
rpc_mkpipe
__rpc_lookup_create() <=== find pipefile *idmap*
__rpc_mkpipe() <=== pipefile is *idmap*
__rpc_create_common()
****** BUG_ON(!d_unhashed(dentry)); ****** *panic*
Version-Release number of selected component (if applicable):
Red Hat Enterprise Linux 6.0
kernel-2.6.32-71
How reproducible:
# cat /etc/exports
/nfsv4 *(rw,insecure,no_root_squash,fsid=0)
# mkdir -p /nfsv4
# service nfs restart
# cat mount-panic.sh
#!/bin/sh
LOOPTOTAL=768
LOOPCOUNT=0
while [ $LOOPCOUNT -ne $LOOPTOTAL ]
do
((LOOPCOUNT += 1))
service nfs restart
/usr/sbin/rpc.idmapd
mount -t nfs4 127.0.0.1:/ /mnt || return;
ls -l /var/lib/nfs/rpc_pipefs/nfs/*
umount /mnt;
echo $LOOPCOUNT
done
# sh mount-panic.sh
Actual results:
Panic happens while the above script is running.
Expected results:
The script completes.
Additional info:
It's reported on the linux-nfs community, too.
http://marc.info/?l=linux-nfs&m=129231689022990&w=2
Patch for linux-2.6.32-71.el6.x86_64 is attached.
Comment 3RHEL Program Management
2011-01-19 14:50:41 UTC
This request was evaluated by Red Hat Product Management for inclusion
in a Red Hat Enterprise Linux maintenance release. Product Management has
requested further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed
products. This request is not yet committed for inclusion in an Update release.
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.
http://rhn.redhat.com/errata/RHSA-2011-0542.html