[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <429e0417-67c3-0187-a588-ca53a3d6c9ff@embeddedor.com>
Date: Thu, 17 Aug 2023 14:59:44 -0600
From: "Gustavo A. R. Silva" <gustavo@...eddedor.com>
To: Kees Cook <keescook@...omium.org>, Paul Moore <paul@...l-moore.com>
Cc: Eric Paris <eparis@...hat.com>, audit@...r.kernel.org,
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] audit: Annotate struct audit_chunk with __counted_by
On 8/17/23 14:35, 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 audit_chunk.
>
> [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
>
> Cc: Paul Moore <paul@...l-moore.com>
> Cc: Eric Paris <eparis@...hat.com>
> Cc: audit@...r.kernel.org
> Signed-off-by: Kees Cook <keescook@...omium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@...nel.org>
Thanks
--
Gustavo
> ---
> kernel/audit_tree.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/kernel/audit_tree.c b/kernel/audit_tree.c
> index e867c17d3f84..85a5b306733b 100644
> --- a/kernel/audit_tree.c
> +++ b/kernel/audit_tree.c
> @@ -34,7 +34,7 @@ struct audit_chunk {
> struct list_head list;
> struct audit_tree *owner;
> unsigned index; /* index; upper bit indicates 'will prune' */
> - } owners[];
> + } owners[] __counted_by(count);
> };
>
> struct audit_tree_mark {
Powered by blists - more mailing lists