linux-kernel - Re: btrfs zero divide

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Date:	Fri, 09 Aug 2013 14:30:38 +0200
From:	Andreas Schwab <schwab@...ux-m68k.org>
To:	Josef Bacik <jbacik@...ionio.com>
Cc:	Thorsten Glaser <tg@...bsd.de>, Joe Perches <joe@...ches.com>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Debian GNU/Linux m68k <debian-68k@...ts.debian.org>,
	<linux-btrfs@...r.kernel.org>,
	Linux Kernel Development <linux-kernel@...r.kernel.org>
Subject: Re: btrfs zero divide

Andreas Schwab <schwab@...ux-m68k.org> writes:

> Josef Bacik <jbacik@...ionio.com> writes:
>
>> So stripe_len shouldn't be 0, if it is you have bigger problems :).
>
> The bigger problem is that stripe_nr is u64, this is completely bogus.
> The first operand of do_div must be u32.  This goes through the whole
> file.

Of course, what I meant was that the *second* operand must be u32, but
that doesn't change my point.

Andreas.

-- 
Andreas Schwab, schwab@...ux-m68k.org
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