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[SLUG] seg fault on df


sometime in the past month, I performed an upgrade
to my unstable debian. (apt-get update/upgrade) and possibly (i can't
remember, a dist-upgrade.

I'm now getting a seg fault on a few commands., but repeatable is
when attempting to run df.

Can anyone suggest a way I can resolve the issue? My ultimate aim is to
fix without a reinstall the box. (but if needed, I guess I will).

Probably the one thing that might be the issue is I am running
2.5.72 kernel.

Here's my seg fault (not that it will help much, but show my pain I
guess :-)

sebago:~# df
Filesystem           1K-blocks      Used Available Use% Mounted on
<1>Unable to handle kernel NULL pointer dereference at virtual address
 printing eip:
 *pde = 00000000
 Oops: 0000 [#14]
 CPU:    0
 EIP:    0060:[<00000018>]    Not tainted
 EFLAGS: 00010246
 eax: 0000010c   ebx: 08051228   ecx: 00000054   edx: 0000007b
 esi: bffff420   edi: 40156510   ebp: c438a000   esp: c438bfc0
 ds: 007b   es: 007b   ss: 0068
 Process df (pid: 9407, threadinfo=c438a000 task=c326ace0)
 Stack: c010904f 08051228 00000054 bffff420 bffff420 40156510 bffff408
        0000007b 0000007b 0000010c 400f0334 00000073 00000246 bffff3b0
        Call Trace: [<c010904f>]
        Code:  Bad EIP value.
         Segmentation fault