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

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Message-ID: <202312041410.708A1416AD@keescook>
Date:   Mon, 4 Dec 2023 14:10:18 -0800
From:   Kees Cook <keescook@...omium.org>
To:     Ronald Monthero <debug.penguin32@...il.com>
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

On Tue, Dec 05, 2023 at 01:46:27AM +1000, Ronald Monthero wrote:
> Cheers Kees,
> BR,
> ronald

Is this a "Tested-by"? :)

-Kees

> 
> 
> 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
> >

-- 
Kees Cook