The patch titled
Subject: x86: disable EXECMEM_ROX support
has been added to the -mm mm-hotfixes-unstable branch. Its filename is
x86-disable-execmem_rox-support.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/x86-disable-execmem_rox-support.patch
This patch will later appear in the mm-hotfixes-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Subject: x86: disable EXECMEM_ROX support
Date: Mon, 13 Jan 2025 12:29:34 +0100
module_writable_address() made a mess of alternative.c, and it still
contains bugs -- notably some of the CFI variants crash and burn.
Mike has been working on patches to clean all this up again, but given the
current state of things, this stuff just isn't ready.
Disable for now, lets try again next cycle.
Link: https://lkml.kernel.org/r/20250113112934.GA8385@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: 5185e7f9f3bd ("x86/module: enable ROX caches for module text on 64 bit")
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Tested-by: Ville Syrjl <ville.syrjala@xxxxxxxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Mike Rapoport <rppt@xxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/x86/Kconfig | 1 -
1 file changed, 1 deletion(-)
--- a/arch/x86/Kconfig~x86-disable-execmem_rox-support
+++ a/arch/x86/Kconfig
@@ -83,7 +83,6 @@ config X86
select ARCH_HAS_DMA_OPS if GART_IOMMU || XEN
select ARCH_HAS_EARLY_DEBUG if KGDB
select ARCH_HAS_ELF_RANDOMIZE
- select ARCH_HAS_EXECMEM_ROX if X86_64
select ARCH_HAS_FAST_MULTIPLIER
select ARCH_HAS_FORTIFY_SOURCE
select ARCH_HAS_GCOV_PROFILE_ALL
_
Patches currently in -mm which might be from peterz@xxxxxxxxxxxxx are
x86-disable-execmem_rox-support.patch
kasan-make-kasan_record_aux_stack_noalloc-the-default-behaviour.patch
