From 2625480a1bf79c62ffb09aafdf61778e682da492 Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Tue, 1 Sep 2026 23:50:02 +0100 Subject: [PATCH] hardening: Default randstruct off with rust for better allmodconfig support Currently randstruct does not support rust so we have Kconfig dependencies which prevent rust being enabled when randstruct is. Unfortunately this prevents rust being enabled in allmodconfig, our standard coverage build. randstruct gets turned on by default, then the dependency on !RANDSTRUCT causes rust to get disabled. Work around this by disabling randstruct by default if we have a usable rust toolchain and rust support for the architecture, circular dependencies prevent us directly depending on !RUST. This means we might end up with a configuration that disables both rust and randstruct but hopefully it's more likely go give the expected result. Signed-off-by: Mark Brown Acked-by: Miguel Ojeda Link: https://patch.msgid.link/20260901-rust-reverse-randstruct-dep-v4-1-3bfa19efe1fa@kernel.org Signed-off-by: Kees Cook --- security/Kconfig.hardening | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/security/Kconfig.hardening b/security/Kconfig.hardening index 6923036e1a2f..81c81ad983ad 100644 --- a/security/Kconfig.hardening +++ b/security/Kconfig.hardening @@ -278,7 +278,7 @@ config CC_HAS_RANDSTRUCT choice prompt "Randomize layout of sensitive kernel structures" - default RANDSTRUCT_FULL if COMPILE_TEST && (GCC_PLUGINS || CC_HAS_RANDSTRUCT) + default RANDSTRUCT_FULL if !(RUST_IS_AVAILABLE && HAVE_RUST) && COMPILE_TEST && (GCC_PLUGINS || CC_HAS_RANDSTRUCT) default RANDSTRUCT_NONE help If you enable this, the layouts of structures that are entirely