linux-kernel - Re: [RFC PATCH 08/15] drivers/acrn: add VM memory management for ACRN char device

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20190819074614.GD4841@zn.tnic>
Date:   Mon, 19 Aug 2019 09:46:14 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Dan Carpenter <dan.carpenter@...cle.com>
Cc:     "Zhao, Yakui" <yakui.zhao@...el.com>, devel@...verdev.osuosl.org,
        Li@...osl.org, x86@...nel.org, linux-kernel@...r.kernel.org,
        Jason Chen CJ <jason.cj.chen@...el.com>,
        Liu Shuo <shuo.a.liu@...el.com>, Fei <lei1.li@...el.com>
Subject: Re: [RFC PATCH 08/15] drivers/acrn: add VM memory management for
 ACRN char device

On Mon, Aug 19, 2019 at 10:39:58AM +0300, Dan Carpenter wrote:
> On Mon, Aug 19, 2019 at 01:32:54PM +0800, Zhao, Yakui wrote:
> > In fact as this driver is mainly used for embedded IOT usage, it doesn't
> > handle the complex cleanup when such error is encountered. Instead the clean
> > up is handled in free_guest_vm.
> 
> A use after free here seems like a potential security problem.  Security
> matters for IoT...  :(

Yeah, the "S" in "IoT" stands for security.

-- 
Regards/Gruss,
    Boris.

Good mailing practices for 400: avoid top-posting and trim the reply.