6.8-stable review patch. If anyone has any objections, please let me know.
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From: Conor Dooley conor.dooley@microchip.com
commit 8933cf4651e02853ca679be7b2d978dfcdcc5e0c upstream.
On RISC-V and arm64, and presumably x86, if CFI_CLANG is enabled, loading a rust module will trigger a kernel panic. Support for sanitisers, including kcfi (CFI_CLANG), is in the works, but for now they're nightly-only options in rustc. Make RUST depend on !CFI_CLANG to prevent configuring a kernel without symmetrical support for kfi.
[ Matthew Maurer writes [1]:
This patch is fine by me - the last patch needed for KCFI to be functional in Rust just landed upstream last night, so we should revisit this (in the form of enabling it) once we move to `rustc-1.79.0` or later.
Ramon de C Valle also gave feedback [2] on the status of KCFI for Rust and created a tracking issue [3] in upstream Rust. - Miguel ]
Fixes: 2f7ab1267dc9 ("Kbuild: add Rust support") Cc: stable@vger.kernel.org Signed-off-by: Conor Dooley conor.dooley@microchip.com Acked-by: Nathan Chancellor nathan@kernel.org Link: https://lore.kernel.org/rust-for-linux/CAGSQo024u1gHJgzsO38Xg3c4or+JupoPABQx... [1] Link: https://lore.kernel.org/rust-for-linux/CAOcBZOS2kPyH0Dm7Fuh4GC3=v7nZhyzBj_-d... [2] Link: https://github.com/rust-lang/rust/issues/123479 [3] Link: https://lore.kernel.org/r/20240404-providing-emporium-e652e359c711@spud [ Added feedback from the list, links, and used Cc for the tag. ] Signed-off-by: Miguel Ojeda ojeda@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- init/Kconfig | 1 + 1 file changed, 1 insertion(+)
--- a/init/Kconfig +++ b/init/Kconfig @@ -1904,6 +1904,7 @@ config RUST bool "Rust support" depends on HAVE_RUST depends on RUST_IS_AVAILABLE + depends on !CFI_CLANG depends on !MODVERSIONS depends on !GCC_PLUGINS depends on !RANDSTRUCT