linux-hardening - [PATCH v1 0/6] vsprintf: Add __printf attribute to where it's required

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Message-ID: <20250320180926.4002817-1-andriy.shevchenko@linux.intel.com>
Date: Thu, 20 Mar 2025 20:04:21 +0200
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Petr Mladek <pmladek@...e.com>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Christophe JAILLET <christophe.jaillet@...adoo.fr>,
	Kees Cook <kees@...nel.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	"Masami Hiramatsu (Google)" <mhiramat@...nel.org>,
	linux-kernel@...r.kernel.org,
	linux-hardening@...r.kernel.org,
	linux-trace-kernel@...r.kernel.org
Cc: John Ogness <john.ogness@...utronix.de>,
	Sergey Senozhatsky <senozhatsky@...omium.org>,
	Andy Shevchenko <andy@...nel.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Rasmus Villemoes <linux@...musvillemoes.dk>
Subject: [PATCH v1 0/6] vsprintf: Add __printf attribute to where it's required

This whole series started from a simple fix (see the last patch)
to make GCC (Debian 14.2.0-17) happy when compiling with `make W=1`
(note, that CONFIG_WERROR=y and all warnings break the build!)
down to a rabbit hole.

The series is organised in a strict order and can't be split or
reshuffled, otherwise see above.

Also note the last patch has a bit of a hackish approach and
I have no idea how to fix it differently, I tried a few different,
all failed. So, if you think there is a better one, please advise!

I believe the best route for the series is printk tree with immutable
tag or branch for the others.

Andy Shevchenko (6):
  seq_buf: Mark binary printing functions with __printf() attribute
  seq_file: Mark binary printing functions with __printf() attribute
  tracing: Mark binary printing functions with __printf() attribute
  vsnprintf: Mark binary printing functions with __printf() attribute
  vsnprintf: Mark pointer() with __printf() attribute
  vsnprintf: Mark va_format() with __printf() attribute

 include/linux/printk.h    |  5 ++++-
 include/linux/seq_buf.h   |  4 ++--
 include/linux/seq_file.h  |  1 +
 include/linux/string.h    |  4 ++--
 include/linux/trace_seq.h |  7 ++++---
 kernel/trace/trace.c      |  3 ---
 kernel/trace/trace.h      | 16 +++++++++-------
 lib/vsprintf.c            |  9 +++++----
 8 files changed, 27 insertions(+), 22 deletions(-)

-- 
2.47.2