Catalin Marinas d89a351b08 arm64: Revert support for execute-only user mappings ... commit 24cecc3774 upstream. The ARMv8 64-bit architecture supports execute-only user permissions by clearing the PTE_USER and PTE_UXN bits, practically making it a mostly privileged mapping but from which user running at EL0 can still execute. The downside, however, is that the kernel at EL1 inadvertently reading such mapping would not trip over the PAN (privileged access never) protection. Revert the relevant bits from commit cab15ce604 ("arm64: Introduce execute-only page access permissions") so that PROT_EXEC implies PROT_READ (and therefore PTE_USER) until the architecture gains proper support for execute-only user mappings. Fixes: cab15ce604 ("arm64: Introduce execute-only page access permissions") Cc: <stable@vger.kernel.org> # 4.9.x- Acked-by: Will Deacon <will@kernel.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2020-01-09 10:19:03 +01:00
..
boot	arm64: dts: exynos: Revert "Remove unneeded address space mapping for soc node"	2019-12-13 08:52:44 +01:00
configs	arm64: defconfig: Enable TI's AM6 SoC platform	2018-08-29 11:51:26 -07:00
crypto	crypto: arm64/sha2-ce - correct digest for empty data in finup	2019-07-26 09:14:19 +02:00
include	arm64: Revert support for execute-only user mappings	2020-01-09 10:19:03 +01:00
kernel	arm64: psci: Reduce the waiting time for cpu_psci_cpu_kill()	2019-12-31 16:35:26 +01:00
kvm	KVM: arm64: Ensure 'params' is initialised when looking up sys register	2019-12-31 16:36:28 +01:00
lib	arm64: lib: use C string functions with KASAN enabled	2019-12-01 09:17:01 +01:00
mm	arm64: Revert support for execute-only user mappings	2020-01-09 10:19:03 +01:00
net	bpf, arm64: use more scalable stadd over ldxr / stxr loop in xadd	2019-07-03 13:14:49 +02:00
xen
Kconfig	arm64: enable generic CPU vulnerabilites support	2019-10-11 18:21:33 +02:00
Kconfig.debug	Kconfig: consolidate the "Kernel hacking" menu	2018-08-02 08:06:48 +09:00
Kconfig.platforms	ARM: SoC: late updates	2018-08-25 14:12:36 -07:00
Makefile	arm64: makefile fix build of .i file in external module case	2019-12-01 09:17:14 +01:00