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Oops on sparse files

To: linux-xfs@xxxxxxxxxxx
Subject: Oops on sparse files
From: Kip Macy <kmacy@xxxxxxxxxxxxxxx>
Date: Mon, 3 Apr 2000 16:34:21 -0700 (PDT)
Sender: owner-linux-xfs@xxxxxxxxxxx
when I type 
> dd if=/dev/zero of=bigfile seek=1024 count=100
I get unable to handle kernel NULL pointer dereference at initial address
0000000c 
printing eip:
c01434dc
*pde=00000000
Entering kdb(0xc22fe000) on processor 0 Panic: Oops
due to panic @0xc01434dc

Then I type:
[0]kdb> bt
with the following response:

pagebuf_get
xfs_zero_last_block
xfs_zero_eof
xfs_igrow_stand
xfs_setattr
linvfs_notify_change
notify_change
do_truncate
sys_ftruncate


This is 100% reproducible.


                                        -Kip



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Kip Macy                               kmacy@xxxxxxxxxxxxxxx
University of California, Berkeley     
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