linux-kernel - Re: [PATCH] vfs: rw_copy_check_uvector()

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Message-ID: <20140423050639.GA2755@zzz.student-wireless07.macalester.edu>
Date:	Wed, 23 Apr 2014 00:06:39 -0500
From:	Eric Biggers <ebiggers3@...il.com>
To:	Dave Jones <davej@...hat.com>, Miklos Szeredi <miklos@...redi.hu>,
	Al Viro <viro@...iv.linux.org.uk>,
	Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linux-Fsdevel <linux-fsdevel@...r.kernel.org>
Subject: Re: [PATCH] vfs: rw_copy_check_uvector() - free iov on error

The proposed patch doesn't work because in compat_rw_copy_check_uvector(), 'iov'
is incremented in the loop before it is freed or returned.  This probably should
be changed to indexing with 'seg', like in the non-compat version...
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