linux-kernel - Re: [PATCH v2 0/2] qnx4: Avoid confusing compiler about buffer lengths

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Message-ID: <CALk6UxrWjHAfUXQZF4UcA-iwW92gpmfc41LBETC5_wDXn4zWww@mail.gmail.com>
Date:   Tue, 5 Dec 2023 01:46:27 +1000
From:   Ronald Monthero <debug.penguin32@...il.com>
To:     Kees Cook <keescook@...omium.org>
Cc:     Anders Larsen <al@...rsen.net>, linux-kernel@...r.kernel.org,
        linux-hardening@...r.kernel.org
Subject: Re: [PATCH v2 0/2] qnx4: Avoid confusing compiler about buffer lengths

Cheers Kees,
BR,
ronald


On Fri, Dec 1, 2023 at 6:51 AM Kees Cook <keescook@...omium.org> wrote:
>
> Hi,
>
> This attempts to fix the issue Ronald Monthero found[1]. Avoids using a
> too-short struct buffer when reading the string, by using the existing
> struct union.
>
> -Kees
>
> [1] https://lore.kernel.org/lkml/20231112095353.579855-1-debug.penguin32@gmail.com/
>
> v2:
>  - Use BUILD_BUG_ON() instead of _Static_assert()
> v1: https://lore.kernel.org/all/20231118032638.work.955-kees@kernel.org/
>
> Kees Cook (2):
>   qnx4: Extract dir entry filename processing into helper
>   qnx4: Use get_directory_fname() in qnx4_match()
>
>  fs/qnx4/dir.c   | 52 ++++++------------------------------------
>  fs/qnx4/namei.c | 29 +++++++++---------------
>  fs/qnx4/qnx4.h  | 60 +++++++++++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 78 insertions(+), 63 deletions(-)
>
> --
> 2.34.1
>