linux-kernel - Re: [GIT PULL] hotfixes for 6.3-rc1

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: <CAHk-=wiHX2NQiVH8uQZ_U8vB=qnzmQHauGAqAkC=4ZWp95ya8w@mail.gmail.com>
Date:   Sat, 4 Mar 2023 15:37:11 -0800
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     "Huang, Ying" <ying.huang@...el.com>, linux-mm@...ck.org,
        mm-commits@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [GIT PULL] hotfixes for 6.3-rc1

On Sat, Mar 4, 2023 at 3:21 PM Andrew Morton <akpm@...ux-foundation.org> wrote:
>
> Ah. Ying did it this way:

Yeah, I saw that patch flying past, but I actually think that it only
silences the warning almost by mistake. There's nothing fundamental in
there that a compiler wouldn't just follow across two assignments, and
it just happens to now not trigger any more.

Assigning to a union entry is a more fundamental operation in that
respect. Not that the compiler still doesn't see that it's assigning a
value that in the end is not really type compatible, so a different
version of gcc could still warn, but at that point I feel like it's
more of an actual compiler bug than just "oh, the compiler didn't
happen to follow the cast through a temporary".

            Linus