On Fri, Jun 05, 2026 at 05:01:46PM +0100, Mark Brown wrote: > 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, 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 <[email protected]>
Can we instead just allow it? This has been ready to go for a while, IIUC: https://lore.kernel.org/all/CANiq72n=hgh4bqjjp8msmhaaxaao75gsbchgtvft3ntsavp...@mail.gmail.com/ -Kees > --- > security/Kconfig.hardening | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/security/Kconfig.hardening b/security/Kconfig.hardening > index 86f8768c63d4..1677c4f9637b 100644 > --- a/security/Kconfig.hardening > +++ b/security/Kconfig.hardening > @@ -285,7 +285,7 @@ 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 && COMPILE_TEST && > (GCC_PLUGINS || CC_HAS_RANDSTRUCT) > default RANDSTRUCT_NONE > help > If you enable this, the layouts of structures that are entirely > > --- > base-commit: e43ffb69e0438cddd72aaa30898b4dc446f664f8 > change-id: 20260605-rust-reverse-randstruct-dep-5a504c861128 > > Best regards, > -- > Mark Brown <[email protected]> > -- Kees Cook
