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From:   Andrea Righi <andrea.righi@canonical.com>
To:     Miguel Ojeda <ojeda@kernel.org>,
        Alex Gaynor <alex.gaynor@gmail.com>,
        Wedson Almeida Filho <wedsonaf@gmail.com>
Cc:     Boqun Feng <boqun.feng@gmail.com>, Gary Guo <gary@garyguo.net>,
        =?UTF-8?q?Bj=C3=B6rn=20Roy=20Baron?= <bjorn3_gh@protonmail.com>,
        Benno Lossin <benno.lossin@proton.me>,
        Kees Cook <keescook@chromium.org>,
        rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] rust: fix bindgen build error with UBSAN_BOUNDS_STRICT
Date:   Tue, 11 Jul 2023 09:19:14 +0200
Message-Id: <20230711071914.133946-1-andrea.righi@canonical.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
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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@canonical.com>
---
 rust/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/rust/Makefile b/rust/Makefile
index 7c9d9f11aec5..4124bfa01798 100644
--- a/rust/Makefile
+++ b/rust/Makefile
@@ -257,7 +257,7 @@ bindgen_skip_c_flags := -mno-fp-ret-in-387 -mpreferred-stack-boundary=% \
 	-fno-partial-inlining -fplugin-arg-arm_ssp_per_task_plugin-% \
 	-fno-reorder-blocks -fno-allow-store-data-races -fasan-shadow-offset=% \
 	-fzero-call-used-regs=% -fno-stack-clash-protection \
-	-fno-inline-functions-called-once \
+	-fno-inline-functions-called-once -fsanitize=bounds-strict \
 	--param=% --param asan-%
 
 # Derived from `scripts/Makefile.clang`.
-- 
2.40.1