linux-kernel - Re: [PATCH] rust: fix bindgen build error with UBSAN_BOUNDS

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Message-ID: <202307110911.D0E735849@keescook>
Date:   Tue, 11 Jul 2023 09:11:56 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Andrea Righi <andrea.righi@...onical.com>
Cc:     Miguel Ojeda <ojeda@...nel.org>,
        Alex Gaynor <alex.gaynor@...il.com>,
        Wedson Almeida Filho <wedsonaf@...il.com>,
        Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>,
        Björn Roy Baron <bjorn3_gh@...tonmail.com>,
        Benno Lossin <benno.lossin@...ton.me>,
        rust-for-linux@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] rust: fix bindgen build error with UBSAN_BOUNDS_STRICT

On Tue, Jul 11, 2023 at 09:19:14AM +0200, Andrea Righi wrote:
> With commit 2d47c6956ab3 ("ubsan: Tighten UBSAN_BOUNDS on GCC") if
> CONFIG_UBSAN is enabled and gcc supports -fsanitize=bounds-strict, we
> can trigger the following build error due to bindgen lacking support for
> this additional build option:
> 
>    BINDGEN rust/bindings/bindings_generated.rs
>  error: unsupported argument 'bounds-strict' to option '-fsanitize='
> 
> Fix by adding -fsanitize=bounds-strict to the list of skipped gcc flags
> for bindgen.
> 
> Fixes: 2d47c6956ab3 ("ubsan: Tighten UBSAN_BOUNDS on GCC")
> Signed-off-by: Andrea Righi <andrea.righi@...onical.com>

Thanks for catching this!

Acked-by: Kees Cook <keescook@...omium.org>

-- 
Kees Cook