linux-kernel - Re: [PATCH net v2 1/4] net/core: relax BUILD_BUG_ON in netdev_stats_to

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Message-ID: <20160131180704.GA36726@redhat.com>
Date:	Sun, 31 Jan 2016 13:07:04 -0500
From:	Jarod Wilson <jarod@...hat.com>
To:	David Miller <davem@...emloft.net>
Cc:	eric.dumazet@...il.com, linux-kernel@...r.kernel.org,
	edumazet@...gle.com, netdev@...r.kernel.org
Subject: Re: [PATCH net v2 1/4] net/core: relax BUILD_BUG_ON in
 netdev_stats_to_stats64

On Sat, Jan 30, 2016 at 03:26:35PM -0800, David Miller wrote:
> From: Jarod Wilson <jarod@...hat.com>
> Date: Sat, 30 Jan 2016 15:53:05 -0500
> 
> > On Sat, Jan 30, 2016 at 03:39:01PM -0500, Jarod Wilson wrote:
> >> Ew, no, it won't work correctly on 32-bit. The for loop is going to copy
> >> data into dst from beyond the end of netdev_stats, and the range looks
> >> like it won't be right either, only half of the added stats64 space will
> >> get zeroed out. Okay, I'll fix that up correctly.
> > 
> > Completely untested as of yet, but I think something like the following
> > looks correct. I'll give it a spin as soon as I can.
> 
> Jarod, please respin your entire series as a v3 once you sort this out.

Will do. I should be able to get it tested out on a 32-bit setup Monday.

-- 
Jarod Wilson
jarod@...hat.com