linux-hardening - Re: [PATCH] usb: gadget: f_fs: Annotate struct ffs_buffer with __counted

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Message-Id: <169601526969.3013632.10440475414357366621.b4-ty@chromium.org>
Date: Fri, 29 Sep 2023 12:21:11 -0700
From: Kees Cook <keescook@...omium.org>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Kees Cook <keescook@...omium.org>
Cc: John Keeping <john@...ping.me.uk>,
	Udipto Goswami <quic_ugoswami@...cinc.com>,
	Linyu Yuan <quic_linyyuan@...cinc.com>,
	linux-usb@...r.kernel.org,
	Nathan Chancellor <nathan@...nel.org>,
	Nick Desaulniers <ndesaulniers@...gle.com>,
	Tom Rix <trix@...hat.com>,
	Krishna Kurapati <quic_kriskura@...cinc.com>,
	Jeff Layton <jlayton@...nel.org>,
	Uttkarsh Aggarwal <quic_uaggarwa@...cinc.com>,
	Yuta Hayama <hayama@...eo.co.jp>,
	linux-kernel@...r.kernel.org,
	llvm@...ts.linux.dev,
	linux-hardening@...r.kernel.org
Subject: Re: [PATCH] usb: gadget: f_fs: Annotate struct ffs_buffer with __counted_by

On Fri, 15 Sep 2023 12:58:49 -0700, Kees Cook wrote:
> Prepare for the coming implementation by GCC and Clang of the __counted_by
> attribute. Flexible array members annotated with __counted_by can have
> their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS
> (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family
> functions).
> 
> As found with Coccinelle[1], add __counted_by for struct ffs_buffer.
> 
> [...]

Applied to for-next/hardening, thanks!

[1/1] usb: gadget: f_fs: Annotate struct ffs_buffer with __counted_by
      https://git.kernel.org/kees/c/84657a30a0c9

Take care,

-- 
Kees Cook