linux-kernel - Re: [PATCH v6 6/8] io_uring/cmd: Introduce SOCKET_URING_OP

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: <3b56190a-e651-43e9-ad16-0d0797593904@kernel.dk>
Date:   Wed, 13 Sep 2023 13:37:39 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     Breno Leitao <leitao@...ian.org>, sdf@...gle.com,
        asml.silence@...il.com, willemdebruijn.kernel@...il.com,
        kuba@...nel.org, pabeni@...hat.com, martin.lau@...ux.dev,
        krisman@...e.de
Cc:     bpf@...r.kernel.org, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, io-uring@...r.kernel.org
Subject: Re: [PATCH v6 6/8] io_uring/cmd: Introduce SOCKET_URING_OP_GETSOCKOPT

On 9/13/23 1:36 PM, Jens Axboe wrote:
> On 9/13/23 9:27 AM, Breno Leitao wrote:
>> Add support for getsockopt command (SOCKET_URING_OP_GETSOCKOPT), where
>> level is SOL_SOCKET. This is similar to the getsockopt(2) system
>> call, and both parameters are pointers to userspace.
>>
>> Important to say that userspace needs to keep the pointer alive until
>> the CQE is completed.
> 
> Since it's holding the data needed, this is true for any request that
> is writing data. IOW, this is not unusual and should be taken for
> granted. I think this may warrant a bit of rewording if the patch is
> respun, if not then just ignore it.

reads data of course, writing into the userspace buffer.

-- 
Jens Axboe