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| author | Alice Ryhl <aliceryhl@google.com> | 2026-04-08 11:32:17 +0300 |
|---|---|---|
| committer | Miguel Ojeda <ojeda@kernel.org> | 2026-05-27 02:54:22 +0300 |
| commit | 72d33b8bfeacbfdccf2cda4650e8e002def036f8 (patch) | |
| tree | 7b123fcabd348cb5b72e460a272161d13cd88f21 | |
| parent | 5b271543d0f08e9733d4732721e960e285f6448f (diff) | |
| download | linux-72d33b8bfeacbfdccf2cda4650e8e002def036f8.tar.xz | |
rust: kasan: add support for Software Tag-Based KASAN
This adds support for Software Tag-Based KASAN (KASAN_SW_TAGS) when
CONFIG_RUST is enabled. This requires that rustc includes support for
the kernel-hwaddress sanitizer, which is available since 1.96.0 [1].
Unlike with clang, we need to pass -Zsanitizer-recover in addition to
-Zsanitizer because the option is not implied automatically.
The kasan makefile uses different names for the flags depending on
whether CC is clang or gcc, but as we require that CC is clang when
using KASAN, we do not need to try to handle mixed gcc/llvm builds when
Rust is enabled.
Link: https://github.com/rust-lang/rust/pull/153049 [1]
Reviewed-by: Danilo Krummrich <dakr@kernel.org>
Signed-off-by: Alice Ryhl <aliceryhl@google.com>
Reviewed-by: Gary Guo <gary@garyguo.net>
Link: https://patch.msgid.link/20260408-kasan-rust-sw-tags-v3-2-e07964d14363@google.com
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
| -rw-r--r-- | init/Kconfig | 2 | ||||
| -rw-r--r-- | scripts/Makefile.kasan | 2 |
2 files changed, 1 insertions, 3 deletions
diff --git a/init/Kconfig b/init/Kconfig index 826a7d768ca3..7ef3fa222ca3 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -2199,7 +2199,7 @@ config RUST depends on !CFI || HAVE_CFI_ICALL_NORMALIZE_INTEGERS_RUSTC select CFI_ICALL_NORMALIZE_INTEGERS if CFI depends on !KASAN || CC_IS_CLANG - depends on !KASAN_SW_TAGS + depends on !KASAN_SW_TAGS || RUSTC_VERSION >= 109600 help Enables Rust support in the kernel. diff --git a/scripts/Makefile.kasan b/scripts/Makefile.kasan index 0ba2aac3b8dc..91504e81247a 100644 --- a/scripts/Makefile.kasan +++ b/scripts/Makefile.kasan @@ -71,8 +71,6 @@ ifdef CONFIG_KASAN_SW_TAGS CFLAGS_KASAN := -fsanitize=kernel-hwaddress -# This sets flags that will enable SW_TAGS KASAN once enabled in Rust. These -# will not work today, and is guarded against in dependencies for CONFIG_RUST. RUSTFLAGS_KASAN := -Zsanitizer=kernel-hwaddress \ -Zsanitizer-recover=kernel-hwaddress |