linux-kernel - Re: [PATCH][-next] mqueue: fix incorrect memset size for object v

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Message-ID: <20170704171310.GW10672@ZenIV.linux.org.uk>
Date:   Tue, 4 Jul 2017 18:13:10 +0100
From:   Al Viro <viro@...IV.linux.org.uk>
To:     Colin King <colin.king@...onical.com>
Cc:     Ingo Molnar <mingo@...nel.org>,
        Luc Van Oostenryck <luc.vanoostenryck@...il.com>,
        Steven Whitehouse <swhiteho@...hat.com>,
        Deepa Dinamani <deepa.kernel@...il.com>,
        Waiman Long <longman@...hat.com>,
        kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH][-next] mqueue: fix incorrect memset size for object v

On Tue, Jul 04, 2017 at 05:09:19PM +0100, Colin King wrote:
> From: Colin Ian King <colin.king@...onical.com>
> 
> The size of the memset is incorrect, it is currently using the size
> of attr (a struct mq_attr *) and not of v (a struct compat_mq_attr)

Folded (and that was a moderate infoleak - ->__reserved[] thing had
been copied out uninitialized).