On 01/11/2012 02:15 PM, Glenn Morris wrote:
> Pat Riehecky wrote:
>
>> A new version of nfs-utils (nfs-utils-1.2.3-15.el6.0.sl6) has been
>> posted in the Scientific Linux testing repository.  The only
>> difference between it and the existing one is an incremented version
>> number.  If testing verifies it works as expected it may be placed in
>> the security tree.
> If I upgrade from the (fixed) nfs-utils-1.2.3-15.el6.x86_64 rpm to this
> version on otherwise up-to-date SL 6.1 x86_64 systems, the umount.nfs
> segfault issue is back:
>
>    umount.nfs[18630]: segfault at 19 ip 00007f605615653a sp 00007fffd63705c0 error 4 in libc-2.12.so[7f60560df000+197000]
>
> It only seems to occur with NFS mounts served from a RHEL 5.7 x86_64 system.
> There is no problem with unmounting mounts served from a RHEL 6.1 x86_64
> NFS system.
>
> This behaviour persists after a reboot.
>
> Downgrading back to nfs-utils-1.2.3-15.el6.x86_64 makes the issue go
> away again.

I don't have any RHEL systems, but I just spun up some SL5.7 systems.  I 
made a 32 and 64 bit system for both 6.1 and 5.7, I then made a read 
only and read-write nfs share from the 5.7 systems.  After mounting it 
on the 6.1 systems and doing various IO, I unmounted it without 
producing a segfault.

I fear I'm unable to replicate the issue.
Pat

-- 
Pat Riehecky
Scientific Linux Developer