linux-hardening - Re: [PATCH] udf: Annotate struct udf_bitmap with __counted

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Date:   Mon, 18 Sep 2023 09:10:57 +0200
From:   Jan Kara <jack@...e.cz>
To:     "Gustavo A. R. Silva" <gustavo@...eddedor.com>
Cc:     Kees Cook <keescook@...omium.org>, Jan Kara <jack@...e.com>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Tom Rix <trix@...hat.com>, linux-kernel@...r.kernel.org,
        llvm@...ts.linux.dev, linux-hardening@...r.kernel.org
Subject: Re: [PATCH] udf: Annotate struct udf_bitmap with __counted_by

On Fri 15-09-23 14:50:14, Gustavo A. R. Silva wrote:
> 
> 
> On 9/15/23 14:14, 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 udf_bitmap.
> > 
> > [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
> > 
> > Cc: Jan Kara <jack@...e.com>
> > Signed-off-by: Kees Cook <keescook@...omium.org>
> 
> Reviewed-by: Gustavo A. R. Silva <gustavoars@...nel.org>

Thanks. I've queued the patch to my tree.

								Honza
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR