netdev - Re: SECURITY PROBLEM: Any user can crash the kernel with TCP ZEROCOPY

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] [day] [month] [year] [list]

Message-ID: <CANn89iLThLScqJh0YSC0W3d2M6DrPzYeX3ViL7UM2BDiNbiWTA@mail.gmail.com>
Date: Thu, 25 Jan 2024 11:31:42 +0100
From: Eric Dumazet <edumazet@...gle.com>
To: "zhangpeng (AS)" <zhangpeng362@...wei.com>
Cc: Matthew Wilcox <willy@...radead.org>, linux-mm@...ck.org, linux-fsdevel@...r.kernel.org, 
	netdev@...r.kernel.org, akpm@...ux-foundation.org, davem@...emloft.net, 
	dsahern@...nel.org, kuba@...nel.org, pabeni@...hat.com, arjunroy@...gle.com, 
	wangkefeng.wang@...wei.com
Subject: Re: SECURITY PROBLEM: Any user can crash the kernel with TCP ZEROCOPY

On Thu, Jan 25, 2024 at 10:22 AM zhangpeng (AS) <zhangpeng362@...wei.com> wrote:
>

>
> This patch can fix this issue.
>
>

Great, I will submit this patch for review then, thanks a lot !

>
> If all the pages that need to be inserted by TCP zerocopy are
> page->mapping == NULL, this solution could be used.

At least the patch looks sane for stable submission.

If we need to extend functionality, it can be done in future kernels.