linux-kernel - Re: PAX: size overflow detected in function __vhost_add_used

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Date:	Sat, 05 Dec 2015 21:26:52 +0100
From:	"PaX Team" <pageexec@...email.hu>
To:	kvm@...r.kernel.org,
	"Toralf Förster" <toralf.foerster@....de>
CC:	Linux Kernel <linux-kernel@...r.kernel.org>, re.emese@...il.com
Subject: Re: PAX: size overflow detected in function __vhost_add_used_n drivers/vhost/vhost.c:1517

On 5 Dec 2015 at 20:51, Toralf Förster wrote:

> run into the following at a 64bit hardened stable Gentoo Linux while
> running the following command at the host (probably just the ssh login
> was it yet) : 
> 
> $ cd ~/devel/linux/; git archive --prefix linux-4.4.x/ v4.4-rc3 | (ssh root@...kvm "cd /usr/src/; sudo tar -xf-")
> 
> 
> Dec  5 20:39:26 t44 kernel: PAX: size overflow detected in function __vhost_add_used_n drivers/vhost/vhost.c:1517 cicus.491_193 max, count: 7, decl: last_used_idx; num: 0; context: vhost_virtqueue;

it was already reported (and is fixed):
  https://forums.grsecurity.net/viewtopic.php?f=3&t=4329

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