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

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Message-Id: <20231130205010.it.412-kees@kernel.org>
Date:   Thu, 30 Nov 2023 12:51:17 -0800
From:   Kees Cook <keescook@...omium.org>
To:     Anders Larsen <al@...rsen.net>
Cc:     Kees Cook <keescook@...omium.org>,
        Ronald Monthero <debug.penguin32@...il.com>,
        linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: [PATCH v2 0/2] qnx4: Avoid confusing compiler about buffer lengths

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