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rust: kasan: KASAN+RUST requires clang

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[ Upstream commit 5b271543d0 ]

Kernel KASAN involves passing various llvm/gcc specific arguments to
the C and Rust compiler. Since these arguments differ between llvm and
gcc, it's not safe to mix an llvm-based rustc with a gcc build when
kasan is enabled.

Signed-off-by: Alice Ryhl <aliceryhl@google.com>
Reviewed-by: Gary Guo <gary@garyguo.net>
Cc: stable@vger.kernel.org
Fixes: e3117404b4 ("kbuild: rust: Enable KASAN support")
Link: https://patch.msgid.link/20260408-kasan-rust-sw-tags-v3-1-e07964d14363@google.com
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Alice Ryhl
2026-07-18 16:53:06 +02:00
committed by Greg Kroah-Hartman
parent a2d5d3ee7b
commit 20133754d4
1 changed files with 1 additions and 0 deletions
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init/Kconfig
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@@ -2096,6 +2096,7 @@ config RUST
depends on !CFI || HAVE_CFI_ICALL_NORMALIZE_INTEGERS_RUSTC
select CFI_ICALL_NORMALIZE_INTEGERS if CFI
depends on !CALL_PADDING || RUSTC_VERSION >= 108100
depends on !KASAN || CC_IS_CLANG
depends on !KASAN_SW_TAGS
depends on !(MITIGATION_RETHUNK && KASAN) || RUSTC_VERSION >= 108300
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