netdev - Re: PROBLEM: network data corruption (bisected to e5a4b0bb803b)

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Message-ID: <20160728003102.GS2356@ZenIV.linux.org.uk>
Date:	Thu, 28 Jul 2016 01:31:02 +0100
From:	Al Viro <viro@...IV.linux.org.uk>
To:	David Miller <davem@...emloft.net>
Cc:	alexmcwhirter@...adic.us, rlwinm@....org, chunkeey@...glemail.com,
	linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: PROBLEM: network data corruption (bisected to e5a4b0bb803b)

On Wed, Jul 27, 2016 at 04:45:43PM -0700, David Miller wrote:

> > I highly expect both my issue and OP's issue to revolve not around
> > commit e5a4b0bb803b specifically, but around other code that no longer
> > behaves as expected because of it.
> 
> Indeed, and that fault address rounding bug occurs two other times
> in arch/sparc/lib/user_fixup.c
> 
> The mentioned patchwork patch should fix the bug and I'll get that
> into my sparc tree, merged, and queued up for -stable ASAP.

Plausible for sparc, but I don't see similar __copy_to_user_inatomic()
bugs in case of x86_64...