linux-kernel - Re: Information leak in llcp_sock_bind/llcp_raw_sock

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Date:	Tue, 15 Dec 2015 15:58:56 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	dvyukov@...gle.com
Cc:	syzkaller@...glegroups.com, lauro.venancio@...nbossa.org,
	aloisio.almeida@...nbossa.org, sameo@...ux.intel.com,
	linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, edumazet@...gle.com, kcc@...gle.com,
	glider@...gle.com, sasha.levin@...cle.com
Subject: Re: Information leak in llcp_sock_bind/llcp_raw_sock_bind

From: Dmitry Vyukov <dvyukov@...gle.com>
Date: Tue, 15 Dec 2015 21:55:37 +0100

> I've seen a kernel address at least in pptp_bind,

We're not talking about pptp_bind.

We're talking about llcp_{,raw}_sock_bind().

If your hex dump doesn't show it, don't report anything unless you are
absolutely sure via code inspection that there could be a leak.  And
in that case make it perfectly clear exactly how that can happen.

I am generally unimpressed with your reports half of the time,
and just a small amount of extra effort would extraordinarily
improve the quality of the things your post.

Thanks.

> So it is almost impossible to prove that a PC cannot be leaked.

You can't show that anything is actually being leaked in this specific
case, period.
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