linux-ext4 - Re: [PATCH 1/5] fallocate() implementation in i86, x86

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Message-Id: <20070503215528.d8ab4e47.akpm@linux-foundation.org>
Date:	Thu, 3 May 2007 21:55:28 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	"Amit K. Arora" <aarora@...ux.vnet.ibm.com>,
	torvalds@...ux-foundation.org, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-ext4@...r.kernel.org,
	xfs@....sgi.com, suparna@...ibm.com, cmm@...ibm.com
Subject: Re: [PATCH 1/5] fallocate() implementation in i86, x86_64 and
 powerpc

On Thu, 3 May 2007 21:29:55 -0700 Andrew Morton <akpm@...ux-foundation.org> wrote:

> > +	ret = -EFBIG;
> > +	if (offset + len > inode->i_sb->s_maxbytes)
> > +		goto out_fput;
> 
> This code does handle offset+len going negative, but only by accident, I
> suspect.

But it doesn't handle offset+len wrapping through zero.
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