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From: Jens Axboe <axboe@kernel.dk>
To: Jinbum Park <jinb.park7@gmail.com>,
	bart.vanassche@wdc.com, jiufei.xue@linux.alibaba.com,
	gustavo@embeddedor.com
Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3] pktcdvd: Fix possible Spectre-v1 for pkt_devs
Date: Sat, 28 Jul 2018 09:08:28 -0600	[thread overview]
Message-ID: <bf58dfc7-3a76-3011-f575-0d43a8ff932b@kernel.dk> (raw)
In-Reply-To: <20180728042044.GA3571@pjb1027-Latitude-E5410>

On 7/27/18 10:20 PM, Jinbum Park wrote:
> User controls @dev_minor which to be used as index of pkt_devs.
> So, It can be exploited via Spectre-like attack. (speculative execution)
> 
> This kind of attack leaks address of pkt_devs, [1]
> It leads an attacker to bypass security mechanism such as KASLR.
> 
> So sanitize @dev_minor before using it to prevent attack.
> 
> [1] https://github.com/jinb-park/linux-exploit/
> tree/master/exploit-remaining-spectre-gadget/leak_pkt_devs.c

Applied for 4.19, thanks.

-- 
Jens Axboe

      reply	other threads:[~2018-07-28 15:08 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-07-28  4:20 [PATCH v3] pktcdvd: Fix possible Spectre-v1 for pkt_devs Jinbum Park
2018-07-28 15:08 ` Jens Axboe [this message]

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