netdev - Re: [PATCH net] net: socket: add check for negative optlen in compat setsockopt

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Message-Id: <20190222.115036.2198036492786822658.davem@davemloft.net>
Date:   Fri, 22 Feb 2019 11:50:36 -0800 (PST)
From:   David Miller <davem@...emloft.net>
To:     jannh@...gle.com
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net] net: socket: add check for negative optlen in
 compat setsockopt

From: Jann Horn <jannh@...gle.com>
Date: Wed, 20 Feb 2019 22:34:54 +0100

> __sys_setsockopt() already checks for `optlen < 0`. Add an equivalent check
> to the compat path for robustness. This has to be `> INT_MAX` instead of
> `< 0` because the signedness of `optlen` is different here.
> 
> Signed-off-by: Jann Horn <jannh@...gle.com>

Applied and queued up for -stable, thanks Jann.