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Subject: Re: 2.6.18-rc4-mm1  BUG null pointer deref while saving a file
From: Dave Kleikamp <shaggy@austin.ibm.com>
To: Helge Hafting <helge.hafting@aitel.hist.no>
Cc: Andrew Morton <akpm@osdl.org>, linux-kernel@vger.kernel.org,
       Steve French <smfltc@us.ibm.com>
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Date: Fri, 18 Aug 2006 07:20:04 -0500
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On Fri, 2006-08-18 at 10:24 +0200, Helge Hafting wrote:
> Dave Kleikamp wrote:
> > On Wed, 2006-08-16 at 13:44 +0200, Helge Hafting wrote:

> >> Aug 16 13:20:30 hh kernel: Call Trace:
> >> Aug 16 13:20:30 hh kernel:  [<c0466bc7>] __down_failed+0x7/0xc
> >> Aug 16 13:20:30 hh kernel: DWARF2 unwinder stuck at __down_failed+0x7/0xc
> >> Aug 16 13:20:31 hh kernel: Leftover inexact backtrace:
> >> Aug 16 13:20:31 hh kernel:  [<c01ed987>] .text.lock.file+0x54/0x9d
> >> Aug 16 13:20:31 hh kernel:  [<c01516bd>] __fput+0xb2/0x163
> >> Aug 16 13:20:31 hh kernel:  [<c014ee9d>] filp_close+0x3e/0x62
> >> Aug 16 13:20:31 hh kernel:  [<c0150168>] sys_close+0x5c/0x6b
> >> Aug 16 13:20:31 hh kernel:  [<c01028c9>] sysenter_past_esp+0x56/0x79
> >>     
> >
> > By any chance would you be using cifs?  This looks just like the bug
> > that is fixed by this patch:
> > http://www.kernel.org/git/gitweb.cgi?p=linux/kernel/git/sfrench/cifs-2.6.git;a=commitdiff;h=e466e4876bf39474e15d0572f2204578137ae7f5
> >   
> Yes, this is on cifs.  I should have mentioned that.  Is this patch going
> in anyway, or should I test it?  I don't know a way of reproducing
> the problem.

This git tree is automatically pulled into the -mm build, so it will be
in the next -mm build.  The patch causing the problem isn't in mainline
yet, so there is no rush to fix it there.

Shaggy
-- 
David Kleikamp
IBM Linux Technology Center

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