netdev - Re: [PATCH net] sk_msg: Always cancel strp work before freeing the psock

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]

Date:   Tue, 29 Jan 2019 00:24:43 +0100
From:   Daniel Borkmann <daniel@...earbox.net>
To:     Jakub Sitnicki <jakub@...udflare.com>, netdev@...r.kernel.org
Cc:     John Fastabend <john.fastabend@...il.com>,
        Marek Majkowski <marek@...udflare.com>
Subject: Re: [PATCH net] sk_msg: Always cancel strp work before freeing the
 psock

On 01/28/2019 10:13 AM, Jakub Sitnicki wrote:
> Despite having stopped the parser, we still need to deinitialize it by
> calling strp_done so that it cancels its work. Otherwise the worker
> thread can run after we have freed the parser, and attempt to access its
> workqueue resulting in a use-after-free:
> 
[...]
> Reported-by: Marek Majkowski <marek@...udflare.com>
> Link: https://lore.kernel.org/netdev/CAJPywTLwgXNEZ2dZVoa=udiZmtrWJ0q5SuBW64aYs0Y1khXX3A@mail.gmail.com
> Signed-off-by: Jakub Sitnicki <jakub@...udflare.com>

Applied, thanks!