Re: [PATCH 4.19 49/81] powerpc: Remove STRICT_KERNEL_RWX incompatibility with RELOCATABLE

On Tue 2020-05-26 20:53:24, Greg Kroah-Hartman wrote:

From: Russell Currey ruscur@russell.cc

[ Upstream commit c55d7b5e64265fdca45c85b639013e770bde2d0e ]

I have tested this with the Radix MMU and everything seems to work, and the previous patch for Hash seems to fix everything too. STRICT_KERNEL_RWX should still be disabled by default for now.

Please test STRICT_KERNEL_RWX + RELOCATABLE!

I don't believe this is suitable for -stable. Yes, it is needed for the next patch, but doing the merge is right solution this time.

Best regards, Pavel

+++ b/arch/powerpc/Kconfig @@ -139,7 +139,7 @@ config PPC select ARCH_HAS_MEMBARRIER_CALLBACKS select ARCH_HAS_SCALED_CPUTIME if VIRT_CPU_ACCOUNTING_NATIVE select ARCH_HAS_SG_CHAIN

• select ARCH_HAS_STRICT_KERNEL_RWX if ((PPC_BOOK3S_64 || PPC32) && !RELOCATABLE && !HIBERNATION)

• select ARCH_HAS_STRICT_KERNEL_RWX if ((PPC_BOOK3S_64 || PPC32) && !HIBERNATION) select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST select ARCH_HAS_UACCESS_FLUSHCACHE if PPC64 select ARCH_HAS_UBSAN_SANITIZE_ALL