linux-kernel - Re: [PATCH] net: tls: fix possible race condition between do_tls_getsockopt_conf() and do_tls_setsockopt

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Date:   Fri, 24 Feb 2023 10:55:08 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     Hangyu Hua <hbh25y@...il.com>
Cc:     Florian Westphal <fw@...len.de>, borisp@...dia.com,
        john.fastabend@...il.com, davem@...emloft.net, edumazet@...gle.com,
        pabeni@...hat.com, davejwatson@...com, aviadye@...lanox.com,
        ilyal@...lanox.com, sd@...asysnail.net, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: tls: fix possible race condition between
 do_tls_getsockopt_conf() and do_tls_setsockopt_conf()

On Fri, 24 Feb 2023 13:06:06 +0100 Florian Westphal wrote:
> Hangyu Hua <hbh25y@...il.com> wrote:
> > ctx->crypto_send.info is not protected by lock_sock in
> > do_tls_getsockopt_conf(). A race condition between do_tls_getsockopt_conf()
> > and do_tls_setsockopt_conf() can cause a NULL point dereference or
> > use-after-free read when memcpy.  
> 
> Its good practice to quote the relevant parts of the splat here.

Right, the bug and the fix seem completely bogus.
Please make sure the bugs are real and the fixes you sent actually 
fix them.