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x86: Disable EXECMEM_ROX support

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The whole module_writable_address() nonsense made a giant mess of
alternative.c, not to mention it still contains bugs -- notable 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.

Fixes: 5185e7f9f3 ("x86/module: enable ROX caches for module text on 64 bit")
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20250113112934.GA8385@noisy.programming.kicks-ass.net
This commit is contained in:
Peter Zijlstra 2025-01-13 12:29:34 +01:00 committed by Borislav Petkov (AMD)
parent 5bc55a333a
commit a9bbe34133
1 changed files with 0 additions and 1 deletions
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arch/x86/Kconfig
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@ -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