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linux-uconsole/arch/arm64/include/asm
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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
..
xen License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
acenv.h
acpi.h arm64: acpi: fix alignment fault in accessing ACPI 2018-07-23 15:34:12 +01:00
alternative.h arm64: Avoid flush_icache_range() in alternatives patching code 2018-06-27 18:21:53 +01:00
arch_gicv3.h irqchip/gic-v3: Probe for SCR_EL3 being clear before resetting AP0Rn 2018-03-22 13:46:18 +00:00
arch_timer.h arm64: arch_timer: Ensure counter register reads occur with seqlock held 2019-05-22 07:37:35 +02:00
arm-cci.h
arm_dsu_pmu.h perf: ARM DynamIQ Shared Unit PMU support 2018-01-02 16:43:12 +00:00
asm-bug.h arm64: asm-bug: Renumber macro local labels to avoid clashes 2017-10-25 15:57:15 +01:00
asm-offsets.h
asm-uaccess.h arm64: mm: Add additional parameter to uaccess_ttbr0_disable 2018-01-17 13:57:49 +01:00
assembler.h Revert "arm64: preempt: Fix big-endian when checking preempt count in assembly" 2019-12-21 10:57:20 +01:00
atomic.h atomics/treewide: Make conditional inc/dec ops optional 2018-06-21 14:25:24 +02:00
atomic_ll_sc.h arm64: Remove redundant mov from LL/SC cmpxchg 2017-05-15 18:30:10 +01:00
atomic_lse.h arm64: lse: Add early clobbers to some input/output asm operands 2018-05-21 19:00:36 +01:00
barrier.h arm64: barrier: Implement smp_cond_load_relaxed 2018-07-05 10:05:05 +01:00
bitops.h locking/atomics/arm64, arm64/bitops: Include <asm-generic/bitops/ext2-atomic-setbit.h> 2018-06-21 12:52:12 +02:00
bitrev.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
boot.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
brk-imm.h
bug.h arm64: Add ASM_BUG() 2017-08-08 16:28:13 +01:00
cache.h arm64: Fix mismatched cache line size detection 2018-07-05 10:19:57 +01:00
cacheflush.h arm64: IPI each CPU after invalidating the I-cache for kernel mappings 2018-07-05 17:24:36 +01:00
checksum.h arm64: add missing conversion to __wsum in ip_fast_csum() 2017-06-29 16:32:43 +01:00
clocksource.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
cmpxchg.h arm64: fix unreachable code issue with cmpxchg 2019-10-07 18:57:01 +02:00
compat.h arm64: compat: Provide definition for COMPAT_SIGMINSTKSZ 2019-08-04 09:30:52 +02:00
compiler.h
cpu.h arm64/sve: Probe SVE capabilities and usable vector lengths 2017-11-03 15:24:17 +00:00
cpu_ops.h
cpucaps.h arm64: cpufeature: Detect SSBS and advertise to userspace 2019-10-11 18:21:10 +02:00
cpufeature.h arm64: Always enable ssb vulnerability detection 2019-10-11 18:21:33 +02:00
cpuidle.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
cputype.h arm64: Add MIDR encoding for HiSilicon Taishan CPUs 2019-11-06 13:05:33 +01:00
current.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
daifflags.h arm64: Move the async/fiq helpers to explicitly set process context flags 2017-11-02 15:55:41 +00:00
dcc.h arm64: dcc: simplify accessors 2016-09-09 11:41:13 +01:00
debug-monitors.h arm64: Add uprobe support 2016-11-07 18:15:21 +00:00
device.h xen/arm,arm64: fix xen_dma_ops after 815dd18 "Consolidate get_dma_ops..." 2017-05-02 11:14:42 +02:00
dma-mapping.h dma-mapping: move dma_mark_clean to dma-direct.h 2018-01-10 16:41:12 +01:00
dmi.h
efi.h arm64/efi: fix variable 'si' set but not used 2019-08-25 10:47:56 +02:00
elf.h arm64: signal: Report signal frame size to userspace via auxv 2018-06-01 15:53:10 +01:00
esr.h arm64: fpsimd: Fix bad si_code for undiagnosed SIGFPE 2018-03-20 10:03:11 +00:00
exception.h arm64: kernel: Prepare for a DISR user 2018-01-16 15:07:12 +00:00
exec.h arm64: suspend: Reconfigure PSTATE after resume from idle 2016-10-20 09:50:54 +01:00
extable.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
fb.h
fixmap.h arm64: kaslr: Put kernel vectors address in separate data page 2017-12-11 13:41:20 +00:00
fpsimd.h arm64: move sve_user_{enable,disable} to <asm/fpsimd.h> 2018-07-12 14:40:39 +01:00
fpsimdmacros.h arm64/sve: Write ZCR_EL1 on context switch only if changed 2018-05-17 18:19:53 +01:00
ftrace.h arm64: ftrace: Fix to enable syscall events on arm64 2018-12-08 12:59:06 +01:00
futex.h arm64: futex: Avoid copying out uninitialised stack in failed cmpxchg() 2019-07-03 13:14:49 +02:00
hardirq.h arm64: Fix HCR.TGE status for NMI contexts 2019-03-23 20:10:08 +01:00
hugetlb.h arm64: mm: Use READ_ONCE/WRITE_ONCE when accessing page tables 2018-02-16 18:13:57 +00:00
hw_breakpoint.h perf/hw_breakpoint: Remove default hw_breakpoint_arch_parse() 2018-06-26 09:07:58 +02:00
hwcap.h
hypervisor.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
insn.h arm64: insn: Fix ldadd instruction encoding 2019-07-03 13:14:49 +02:00
io.h arm64: io: Ensure value passed to __iormb() is held in a 64-bit register 2019-02-12 19:47:03 +01:00
irq.h arm64: Use the new GENERIC_IRQ_MULTI_HANDLER 2018-08-03 12:14:09 +02:00
irq_work.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
irqflags.h arm64: Move the async/fiq helpers to explicitly set process context flags 2017-11-02 15:55:41 +00:00
jump_label.h arm64: jump_label.h: use asm_volatile_goto macro instead of "asm goto" 2018-09-11 11:07:11 +01:00
kasan.h kasan: clean up KASAN_SHADOW_SCALE_SHIFT usage 2018-02-06 18:32:43 -08:00
Kbuild arm64: locking: Replace ticket lock implementation with qspinlock 2018-07-05 10:05:06 +01:00
kernel-pgtable.h arm64: kpti: Make use of nG dependent on arm64_kernel_unmapped_at_el0() 2018-02-06 22:53:14 +00:00
kexec.h arm64: kdump: implement machine_crash_shutdown() 2017-04-05 18:29:15 +01:00
kgdb.h
kprobes.h arm64/kprobes: Remove jprobe implementation 2018-06-21 12:33:07 +02:00
kvm_arm.h arm64: Don't trap host pointer auth use to EL2 2019-01-22 21:40:30 +01:00
kvm_asm.h Small update for KVM. 2018-06-12 11:34:04 -07:00
kvm_coproc.h
kvm_emulate.h KVM/arm updates for 4.19 2018-08-22 14:07:56 +02:00
kvm_host.h KVM: arm64: Set SCTLR_EL2.DSSBS if SSBD is forcefully disabled and !vhe 2019-10-11 18:21:30 +02:00
kvm_hyp.h KVM: arm/arm64: Avoid VGICv3 save/restore on VHE with no IRQs 2018-03-19 10:53:21 +00:00
kvm_mmio.h
kvm_mmu.h KVM: arm/arm64: vgic-its: Take the srcu lock when writing to guest memory 2019-05-04 09:20:13 +02:00
linkage.h arm64: relax assembly code alignment from 16 byte to 4 byte 2017-09-18 11:20:19 +01:00
lse.h arm64: lse: Include compiler_types.h and export.h for out-of-line LL/SC 2018-03-27 13:14:49 +01:00
memblock.h
memory.h arm64: kasan: Increase stack size for KASAN_EXTRA 2019-01-26 09:32:38 +01:00
mmu.h arm64: KVM: Allow mapping of vectors outside of the RAM region 2018-03-19 13:06:46 +00:00
mmu_context.h arm64: mm: Use READ_ONCE/WRITE_ONCE when accessing page tables 2018-02-16 18:13:57 +00:00
mmzone.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
module.h arm64/kernel: rename module_emit_adrp_veneer->module_emit_veneer_for_adrp 2018-04-24 19:07:35 +01:00
neon.h arm64: drop unused kernel_neon_begin_partial() macro 2018-07-31 10:13:50 +01:00
numa.h arm64: numa: separate out updates to percpu nodeid and NUMA node cpumap 2018-07-06 13:18:18 +01:00
page-def.h arm64: factor out PAGE_* and CONT_* definitions 2017-08-15 18:35:00 +01:00
page.h arm64: factor out PAGE_* and CONT_* definitions 2017-08-15 18:35:00 +01:00
paravirt.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pci.h PCI: remove PCI_DMA_BUS_IS_PHYS 2018-05-07 07:15:41 +02:00
percpu.h arm64: percpu: Initialize ret in the default case 2018-11-27 16:13:01 +01:00
perf_event.h arm64/bpf: correct broken uapi for BPF_PROG_TYPE_PERF_EVENT program type 2017-12-05 15:02:41 +01:00
pgalloc.h arm64: mm: Use READ_ONCE/WRITE_ONCE when accessing page tables 2018-02-16 18:13:57 +00:00
pgtable-hwdef.h arm64: kaslr: Set TCR_EL1.NFD1 when CONFIG_RANDOMIZE_BASE=y 2018-03-06 18:52:34 +00:00
pgtable-prot.h arm64: Revert support for execute-only user mappings 2020-01-09 10:19:03 +01:00
pgtable-types.h arch, mm: convert all architectures to use 5level-fixup.h 2017-03-09 11:48:47 -08:00
pgtable.h arm64: Revert support for execute-only user mappings 2020-01-09 10:19:03 +01:00
probes.h arm64: Remove reference to asm/opcodes.h 2016-12-05 10:42:34 +00:00
proc-fns.h arm64: mm: Move ASID from TTBR0 to TTBR1 2017-12-11 13:40:25 +00:00
processor.h arm64: Force SSBS on context switch 2019-10-11 18:21:37 +02:00
ptdump.h arm64: dump: Add checking for writable and exectuable pages 2016-11-07 18:15:04 +00:00
ptrace.h arm64: ssbd: Add support for PSTATE.SSBS rather than trapping to EL3 2019-10-11 18:21:30 +02:00
sdei.h arm64: Add stack information to on_accessible_stack 2018-07-26 11:36:07 +01:00
seccomp.h
sections.h arm64: mmu: add the entry trampolines start/end section markers into sections.h 2018-01-14 18:49:50 +00:00
shmparam.h
signal32.h arm64: compat: Remove leftover variable declaration 2017-08-10 18:17:32 +01:00
simd.h arm64: neon: Fix function may_use_simd() return error status 2018-07-11 17:02:02 +01:00
smp.h arm64: kexec: have own crash_smp_send_stop() for crash dump for nonpanic cores 2017-08-21 18:01:04 +01:00
smp_plat.h
sparsemem.h arm64: add kconfig symbol to configure physical address size 2017-12-22 17:30:33 +00:00
spinlock.h arm64: locking: Replace ticket lock implementation with qspinlock 2018-07-05 10:05:06 +01:00
spinlock_types.h arm64: locking: Replace ticket lock implementation with qspinlock 2018-07-05 10:05:06 +01:00
stack_pointer.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
stackprotector.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
stacktrace.h arm64: Add stack information to on_accessible_stack 2018-07-26 11:36:07 +01:00
stage2_pgtable-nopmd.h
stage2_pgtable-nopud.h
stage2_pgtable.h
stat.h compat: Move compat_timespec/ timeval to compat_time.h 2018-04-19 13:29:54 +02:00
string.h arm64: lib: use C string functions with KASAN enabled 2019-12-01 09:17:01 +01:00
suspend.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sync_bitops.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
syscall.h arm64: fix syscall_fn_t type 2019-06-22 08:15:20 +02:00
syscall_wrapper.h arm64: use the correct function type in SYSCALL_DEFINE0 2019-06-22 08:15:20 +02:00
sysreg.h arm64: ssbd: Add support for PSTATE.SSBS rather than trapping to EL3 2019-10-11 18:21:30 +02:00
system_misc.h arm64: Move show_unhandled_signals_ratelimited into traps.c 2018-03-06 18:52:31 +00:00
thread_info.h Small update for KVM. 2018-06-12 11:34:04 -07:00
timex.h arm64: Use physical counter for in-kernel reads when booted in EL2 2017-11-06 16:23:09 +01:00
tlb.h arm64: tlb: Provide forward declaration of tlb_flush() before including tlb.h 2018-08-23 18:34:57 -07:00
tlbflush.h arm64: tlb: Ensure we execute an ISB following walk cache invalidation 2019-10-05 13:10:07 +02:00
topology.h arm64: topology: rename llc_siblings to align with other struct members 2018-07-06 13:18:18 +01:00
traps.h arm64: Introduce arm64_force_sig_info and hook up in arm64_notify_die 2018-03-06 18:52:23 +00:00
uaccess.h arm64: uaccess: Formalise types for access_ok() 2018-02-19 13:59:58 +00:00
unistd.h arm64: compat: Avoid sending SIGILL for unallocated syscall numbers 2019-01-09 17:38:49 +01:00
unistd32.h arm64: convert compat wrappers to C 2018-07-12 14:49:48 +01:00
uprobes.h arm64: Add uprobe support 2016-11-07 18:15:21 +00:00
vdso.h
vdso_datapage.h arm64: vdso: Fix clock_getres() for CLOCK_REALTIME 2019-05-31 06:46:21 -07:00
virt.h arm64: capabilities: Change scope of VHE to Boot CPU feature 2018-03-26 18:01:41 +01:00
vmap_stack.h arm64: Add vmap_stack header file 2018-01-13 10:45:03 +00:00
word-at-a-time.h Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00