From: Kees Cook <keescook@chromium.org>
To: "Gustavo A. R. Silva" <gustavoars@kernel.org>
Cc: Kalle Valo <kvalo@kernel.org>,
linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-hardening@vger.kernel.org
Subject: Re: [PATCH][next] hostap: Add __counted_by for struct prism2_download_data and use struct_size()
Date: Tue, 10 Oct 2023 15:50:06 -0700 [thread overview]
Message-ID: <202310101549.E09DE6F@keescook> (raw)
In-Reply-To: <ZSRXXvWMMkm7qqRW@work>
On Mon, Oct 09, 2023 at 01:41:18PM -0600, Gustavo A. R. Silva 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 via CONFIG_UBSAN_BOUNDS (for
> array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family
> functions).
>
> While there, use struct_size() helper, instead of the open-coded
> version, to calculate the size for the allocation of the whole
> flexible structure, including of course, the flexible-array member.
>
> This code was found with the help of Coccinelle, and audited and
> fixed manually.
>
> Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
I realize I didn't actually send my R-b for this thread, so here it is:
Reviewed-by: Kees Cook <keescook@chromium.org>
:)
--
Kees Cook
next prev parent reply other threads:[~2023-10-10 22:50 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-09 19:41 [PATCH][next] hostap: Add __counted_by for struct prism2_download_data and use struct_size() Gustavo A. R. Silva
2023-10-09 19:54 ` Kees Cook
2023-10-09 20:33 ` Gustavo A. R. Silva
2023-10-09 20:42 ` Kees Cook
2023-10-10 6:17 ` Kalle Valo
2023-10-10 12:44 ` Gustavo A. R. Silva
2023-10-10 22:50 ` Kees Cook [this message]
2023-10-10 23:24 ` Gustavo A. R. Silva
2023-10-11 9:20 ` [next] wifi: " Kalle Valo
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