linux-kernel - Re: sg_io HARDENED_USERCOPY

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Message-ID: <20161229154351.6zrxuagi62pga6mt@codemonkey.org.uk>
Date:   Thu, 29 Dec 2016 10:43:51 -0500
From:   Dave Jones <davej@...emonkey.org.uk>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     Kees Cook <keescook@...omium.org>,
        Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: sg_io HARDENED_USERCOPY_PAGESPAN trace

On Wed, Dec 28, 2016 at 11:56:42PM -0800, Christoph Hellwig wrote:
 > On Wed, Dec 28, 2016 at 04:40:16PM -0500, Dave Jones wrote:
 > >  sg_io+0x113/0x470
 > 
 > Can you resolve that to a source line using a gdb?

It's the copy_from_user in an inlined copy of blk_fill_sghdr_rq.

	Dave