linux-kernel - Re: [PATCH] coredump, vmcore: Set p_align to 4 for PT

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Message-Id: <168427275061.1358677.10611822490555556072.b4-ty@chromium.org>
Date:   Tue, 16 May 2023 14:32:34 -0700
From:   Kees Cook <keescook@...omium.org>
To:     linux-fsdevel@...r.kernel.org, kexec@...ts.infradead.org,
        Al Viro <viro@...iv.linux.org.uk>, bhe@...hat.com,
        maskray@...gle.com, ebiederm@...ssion.com, brauner@...nel.org,
        vgoyal@...hat.com, dyoung@...hat.com
Cc:     Kees Cook <keescook@...omium.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] coredump, vmcore: Set p_align to 4 for PT_NOTE

On Fri, 12 May 2023 02:25:28 +0000, Fangrui Song wrote:
> Tools like readelf/llvm-readelf use p_align to parse a PT_NOTE program
> header as an array of 4-byte entries or 8-byte entries. Currently, there
> are workarounds[1] in place for Linux to treat p_align==0 as 4. However,
> it would be more appropriate to set the correct alignment so that tools
> do not have to rely on guesswork. FreeBSD coredumps set p_align to 4 as
> well.
> 
> [...]

Applied to for-next/execve, thanks!

[1/1] coredump, vmcore: Set p_align to 4 for PT_NOTE
      https://git.kernel.org/kees/c/60592fb6b67c

-- 
Kees Cook