linux-kernel - Re: [PATCH] fix sun partition overflow over 1T

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Message-Id: <20060804.163549.106287275.davem@davemloft.net>
Date:	Fri, 04 Aug 2006 16:35:49 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	alan@...rguk.ukuu.org.uk
Cc:	esandeen@...hat.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] fix sun partition overflow over 1T

From: Alan Cox <alan@...rguk.ukuu.org.uk>
Date: Fri, 04 Aug 2006 17:56:30 +0100

> Ar Gwe, 2006-08-04 am 11:22 -0500, ysgrifennodd Eric Sandeen:
> > Although sun partition labels aren't supposed to support > 1T, apparently
> > linux partition editors will allow up to 2T.  This can cause problems
> > in the kernel when these larger partitions are read, due to a signed
> > int container.
> > 
> > num_sectors in the sun_disklabel struct is marked as __u32 in 2.4, and 
> > as __be32 in 2.6.  However, this is assigned to a signed int in
> > sun_partition():
> > 
> >                 int num_sectors;
> > 
> >                 st_sector = be32_to_cpu(p->start_cylinder) * spc;
> >                 num_sectors = be32_to_cpu(p->num_sectors);
> > 
> > Changing num_sectors to an unsigned int avoids this problem.
> > 
> 
> > Signed-off-by: Eric Sandeen <esandeen@...hat.com>
> 
> Acked-by: Alan Cox <alan@...hat.com>

Applied, thanks a lot.
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