linux-kernel - Re: Is ->sendmsg() allowed to change the msghdr struct it is given?

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 for Android: free password hash cracker in your pocket

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

Message-ID: <20230626142257.6e14a801@kernel.org>
Date:   Mon, 26 Jun 2023 14:22:57 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     David Howells <dhowells@...hat.com>
Cc:     Ilya Dryomov <idryomov@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>, ceph-devel@...r.kernel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: Is ->sendmsg() allowed to change the msghdr struct it is given?

On Mon, 26 Jun 2023 22:14:41 +0100 David Howells wrote:
> Do you know if ->sendmsg() might alter the msghdr struct it is passed as an
> argument? Certainly it can alter msg_iter, but can it also modify,
> say, msg_flags?

I'm not aware of a precedent either way.
Eric or Paolo would know better than me, tho.