linux-ext4 - Re: [PATCH] ext4: Fix crash due to getting bogus eh

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Date:	Mon, 12 Dec 2011 11:00:40 -0500
From:	Ted Ts'o <tytso@....edu>
To:	Paul Mackerras <paulus@...ba.org>
Cc:	linux-ext4@...r.kernel.org, Dmitry Monakhov <dmonakhov@...nvz.org>
Subject: Re: [PATCH] ext4: Fix crash due to getting bogus eh_depth value

On Mon, Dec 12, 2011 at 09:49:52PM +1100, Paul Mackerras wrote:
> Commit 1939dd84b3 ("ext4: cleanup ext4_ext_grow_indepth code") added a
> reference to ext4_extent_header.eh_depth, but forget to pass the value
> read through le16_to_cpu.  The result is a crash on big-endian
> machines, such as this crash on a POWER7 server:

Thanks for finding this!  While I was driving to work I had started
thinking that 0x0101 was a very suspicious number, and I was thinking
that it might have been a missing byte swap somewhere.

I'll get this pushed to Linus ASAP as a regression fix.

     	      				- Ted
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