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15956689a0
linux/arch/arm64/include/asm
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Will Deacon 15956689a0 arm64: compat: Ensure upper 32 bits of x0 are zero on syscall return 
Although we zero the upper bits of x0 on entry to the kernel from an
AArch32 task, we do not clear them on the exception return path and can
therefore expose 64-bit sign extended syscall return values to userspace
via interfaces such as the 'perf_regs' ABI, which deal exclusively with
64-bit registers.

Explicitly clear the upper 32 bits of x0 on return from a compat system
call.

Cc: <stable@vger.kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Keno Fischer <keno@juliacomputing.com>
Cc: Luis Machado <luis.machado@linaro.org>
Signed-off-by: Will Deacon <will@kernel.org>
2020-07-16 11:41:31 +01:00
..
vdso arm64: Introduce a way to disable the 32bit vdso 2020-07-08 21:57:51 +01:00
xen xen: fixes and cleanups for 5.4-rc2 2019-10-04 11:13:09 -07:00
acenv.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
acpi.h arm64: acpi: fix UBSAN warning 2020-06-10 11:41:08 +01:00
alternative.h arm64/alternatives: use subsections for replacement sequences 2020-07-02 12:57:17 +01:00
arch_gicv3.h KVM/arm fixes for 5.6, take #1 2020-02-28 11:50:06 +01:00
arch_timer.h arm64: arch_timer: Allow an workaround descriptor to disable compat vdso 2020-07-08 21:57:51 +01:00
archrandom.h arm64: add credited/trusted RNG support 2020-02-27 23:21:52 -05:00
arm_dsu_pmu.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
arm-cci.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
asm_pointer_auth.h arm64: simplify ptrauth initialization 2020-04-28 11:23:21 +01:00
asm-bug.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
asm-offsets.h
asm-prototypes.h arm64: asm-prototypes: Fix fat-fingered typo in comment 2019-01-10 11:11:46 +00:00
asm-uaccess.h arm64 updates for 5.5: 2019-11-25 15:39:19 -08:00
assembler.h arm64: asm: Provide a mechanism for generating ELF note for BTI 2020-05-07 17:53:20 +01:00
atomic_ll_sc.h arm64: Move the LSE gas support detection to Kconfig 2020-01-15 12:50:48 +00:00
atomic_lse.h arm64: lse: fix LSE atomics with LLVM's integrated assembler 2020-01-16 17:25:10 +00:00
atomic.h locking/atomics: Flip fallbacks and instrumentation 2020-06-11 08:03:24 +02:00
barrier.h arm64: barrier: Use '__unqual_scalar_typeof' for acquire/release macros 2020-04-16 12:28:35 +01:00
bitops.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
bitrev.h
boot.h treewide: replace #include <asm/sizes.h> with #include <linux/sizes.h> 2019-05-14 19:52:52 -07:00
brk-imm.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
bug.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
cache.h arm64: Ask the compiler to __always_inline functions used by KVM at HYP 2020-02-22 11:01:47 +00:00
cacheflush.h arm64: use asm-generic/cacheflush.h 2020-06-08 11:05:57 -07:00
checksum.h arm64: csum: Optimise IPv6 header checksum 2020-03-09 18:08:25 +00:00
clocksource.h arm64: Introduce asm/vdso/clocksource.h 2020-03-21 15:23:55 +01:00
cmpxchg.h arm64: fix unreachable code issue with cmpxchg 2019-09-17 12:11:50 +01:00
compat.h compat: provide compat_ptr() on all architectures 2020-01-03 09:32:51 +01:00
compiler.h arm64/crash_core: Export KERNELPACMASK in vmcoreinfo 2020-05-11 14:29:10 +01:00
cpu_ops.h arm64: Introduce get_cpu_ops() helper function 2020-03-24 17:24:19 +00:00
cpu.h arm64/cpuinfo: Add ID_MMFR4_EL1 into the cpuinfo_arm64 context 2020-05-21 15:47:12 +01:00
cpucaps.h Merge branch 'for-next/kvm/errata' into for-next/core 2020-05-28 18:02:51 +01:00
cpufeature.h Merge branch 'for-next/bti' into for-next/core 2020-05-28 18:00:51 +01:00
cpuidle.h
cputype.h arm64: Add MIDR value for KRYO4XX gold CPU cores 2020-07-03 16:39:16 +01:00
current.h
daifflags.h arm64: acpi: fix DAIF manipulation with pNMI 2020-01-22 14:41:22 +00:00
dcc.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 284 2019-06-05 17:36:37 +02:00
debug-monitors.h arm64: ptrace: Override SPSR.SS when single-stepping is enabled 2020-07-16 11:41:21 +01:00
device.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
dmi.h
efi.h efi/libstub: unify EFI call wrappers for non-x86 2020-04-23 20:15:06 +02:00
elf.h Split the old READ_IMPLIES_EXEC workaround from executable PT_GNU_STACK 2020-06-05 13:45:21 -07:00
esr.h Merge branch 'for-next/bti-user' into for-next/bti 2020-05-05 15:15:58 +01:00
exception.h arm64: Basic Branch Target Identification support 2020-03-16 17:19:48 +00:00
exec.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
extable.h
fb.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
fixmap.h firmware: arm_sdei: Add ACPI GHES registration helper 2019-02-11 11:07:49 +01:00
fpsimd.h arm64: remove pointless __KERNEL__ guards 2019-08-05 11:06:33 +01:00
fpsimdmacros.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
ftrace.h arm64: implement ftrace with regs 2019-11-06 14:17:35 +00:00
futex.h futex: arch_futex_atomic_op_inuser() calling conventions change 2020-03-27 23:58:51 -04:00
hardirq.h arm64: Prepare arch_nmi_enter() for recursion 2020-05-19 15:51:17 +02:00
hugetlb.h mm/hugetlb: define a generic fallback for arch_clear_hugepage_flags() 2020-06-03 20:09:46 -07:00
hw_breakpoint.h arm64: remove pointless __KERNEL__ guards 2019-08-05 11:06:33 +01:00
hwcap.h arm64: Basic Branch Target Identification support 2020-03-16 17:19:48 +00:00
hypervisor.h
image.h docs: arm64: convert docs to ReST and rename to .rst 2019-06-14 14:20:27 -06:00
insn.h arm64: insn: Provide a better name for aarch64_insn_is_nop() 2020-05-04 16:06:29 +01:00
io.h mm: reorder includes after introduction of linux/pgtable.h 2020-06-09 09:39:13 -07:00
irq_work.h
irq.h arm64: Use the new GENERIC_IRQ_MULTI_HANDLER 2018-08-03 12:14:09 +02:00
irqflags.h arm64: Relax ICC_PMR_EL1 accesses when ICC_CTLR_EL1.PMHE is clear 2019-10-15 12:26:09 +01:00
jump_label.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
kasan.h arm64: mm: Introduce vabits_actual 2019-08-09 11:17:21 +01:00
Kbuild asm-generic: make more kernel-space headers mandatory 2020-04-02 09:35:25 -07:00
kernel-pgtable.h mm: introduce include/linux/pgtable.h 2020-06-09 09:39:13 -07:00
kexec.h Revert "arm64: kexec: make dtb_mem always enabled" 2020-01-10 16:00:50 +00:00
kgdb.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
kprobes.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
kvm_arm.h arm64/kvm: disable access to AMU registers from kvm guests 2020-03-06 16:02:50 +00:00
kvm_asm.h KVM: arm64: Move hyp_symbol_addr() to kvm_asm.h 2020-06-10 19:09:09 +01:00
kvm_coproc.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
kvm_emulate.h KVM/arm64 fixes for Linux 5.8, take #1 2020-06-11 14:02:32 -04:00
kvm_host.h KVM/arm64 fixes for Linux 5.8, take #1 2020-06-11 14:02:32 -04:00
kvm_hyp.h ARM: 2020-06-03 15:13:47 -07:00
kvm_mmu.h MIPS: 2020-06-12 11:05:52 -07:00
kvm_ptrauth.h KVM: arm/arm64: Context-switch ptrauth registers 2019-04-24 15:30:40 +01:00
kvm_ras.h arm64: KVM/mm: Move SEA handling behind a single 'claim' interface 2019-02-07 23:10:45 +01:00
linkage.h arm64: Don't insert a BTI instruction at inner labels 2020-06-24 14:24:29 +01:00
lse.h arm64: lse: Fix LSE atomics with LLVM 2020-02-18 18:10:49 +00:00
memory.h arm64: remove CONFIG_DEBUG_ALIGN_RODATA feature 2020-04-01 21:44:43 +01:00
mman.h arm64: Basic Branch Target Identification support 2020-03-16 17:19:48 +00:00
mmu_context.h mm: reorder includes after introduction of linux/pgtable.h 2020-06-09 09:39:13 -07:00
mmu.h arm64: compat: Allow 32-bit vdso and sigpage to co-exist 2020-06-23 14:47:03 +01:00
mmzone.h
module.h arch: split MODULE_ARCH_VERMAGIC definitions out to <asm/vermagic.h> 2020-04-23 10:50:26 +09:00
neon-intrinsics.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
neon.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
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 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
page.h mm/vma: define a default value for VM_DATA_DEFAULT_FLAGS 2020-04-10 15:36:21 -07:00
paravirt.h arm64: Retrieve stolen time as paravirtualized guest 2019-10-21 19:20:31 +01:00
pci.h arm64: remove pointless __KERNEL__ guards 2019-08-05 11:06:33 +01:00
percpu.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
perf_event.h arm64: perf: Add support for ARMv8.5-PMU 64-bit counters 2020-03-17 22:50:30 +00:00
pgalloc.h arm64: add support for folded p4d page tables 2020-06-04 19:06:21 -07:00
pgtable-hwdef.h Merge branch 'for-next/bti' into for-next/core 2020-05-28 18:00:51 +01:00
pgtable-prot.h KVM: arm64: Fix definition of PAGE_HYP_DEVICE 2020-07-08 21:35:48 +01:00
pgtable-types.h arm64: add support for folded p4d page tables 2020-06-04 19:06:21 -07:00
pgtable.h arm64: pgtable: Clear the GP bit for non-executable kernel pages 2020-06-16 17:21:07 +01:00
pointer_auth.h arm64: sync kernel APIAKey when installing 2020-04-21 15:52:56 +01:00
preempt.h sched/rt, arm64: Use CONFIG_PREEMPTION 2019-12-08 14:37:32 +01:00
probes.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
proc-fns.h arm64: mm: convert cpu_do_switch_mm() to C 2020-02-27 14:30:50 +00:00
processor.h arm64 updates for 5.7: 2020-03-31 10:05:01 -07:00
ptdump.h arm64: mm: convert mm/dump.c to use walk_page_range() 2020-02-04 03:05:25 +00:00
ptrace.h KVM: arm64: Parametrize exception entry with a target EL 2020-05-28 13:16:55 +01:00
pvclock-abi.h KVM: arm64: Implement PV_TIME_FEATURES call 2019-10-21 19:20:27 +01:00
scs.h scs: Move scs_overflow_check() out of architecture code 2020-05-18 17:47:40 +01:00
sdei.h arm64: Use the correct style for SPDX License Identifier 2019-04-16 16:28:01 +01:00
seccomp.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
sections.h arm64: Remove __exception_text_start and __exception_text_end from asm/section.h 2020-01-08 17:30:19 +00:00
shmparam.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
signal32.h arm64: remove pointless __KERNEL__ guards 2019-08-05 11:06:33 +01:00
simd.h arm64: fpsimd: Make sure SVE setup is complete before SIMD is used 2020-01-14 17:11:21 +00:00
smp_plat.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
smp.h arm64: simplify ptrauth initialization 2020-04-28 11:23:21 +01:00
sparsemem.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
spinlock_types.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
spinlock.h arm64/spinlock: fix a -Wunused-function warning 2020-02-10 11:29:24 +00:00
stack_pointer.h
stackprotector.h arm64: initialize ptrauth keys for kernel booting task 2020-03-18 09:50:20 +00:00
stacktrace.h arm64: add loglvl to dump_backtrace() 2020-06-09 09:39:11 -07:00
stage2_pgtable.h mm: introduce include/linux/pgtable.h 2020-06-09 09:39:13 -07:00
stat.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
string.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
suspend.h arm64: Preserve register x18 when CPU is suspended 2020-05-15 16:35:50 +01:00
sync_bitops.h arm64, locking/atomics: Use instrumented atomics 2018-11-01 11:01:40 +01:00
syscall_wrapper.h arm64: simplify syscall wrapper ifdeffery 2019-10-14 10:55:00 +01:00
syscall.h arm64: compat: Ensure upper 32 bits of x0 are zero on syscall return 2020-07-16 11:41:31 +01:00
sysreg.h Merge branch 'for-next/bti' into for-next/core 2020-05-28 18:00:51 +01:00
system_misc.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
thread_info.h arm64: ptrace: Consistently use pseudo-singlestep exceptions 2020-07-16 11:41:07 +01:00
timex.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
tlb.h mm: treewide: clarify pgtable_page_{ctor,dtor}() naming 2019-09-26 10:10:44 -07:00
tlbflush.h arm64: tlb: Ensure we execute an ISB following walk cache invalidation 2019-08-27 17:38:26 +01:00
topology.h arm64 updates for 5.7: 2020-03-31 10:05:01 -07:00
traps.h arm64: remove __exception annotations 2019-10-28 11:22:38 +00:00
uaccess.h arm64: Add get_user() type annotation on the !access_ok() path 2020-05-22 16:59:49 +01:00
unistd32.h vfs: add faccessat2 syscall 2020-05-14 16:44:25 +02:00
unistd.h vfs: add faccessat2 syscall 2020-05-14 16:44:25 +02:00
uprobes.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
vdso.h arm64: remove pointless __KERNEL__ guards 2019-08-05 11:06:33 +01:00
vermagic.h arch: split MODULE_ARCH_VERMAGIC definitions out to <asm/vermagic.h> 2020-04-23 10:50:26 +09:00
virt.h KVM: arm64: Use cpus_have_final_cap for has_vhe() 2020-05-16 15:04:51 +01:00
vmalloc.h mm/vmalloc: Add empty <asm/vmalloc.h> headers and use them from <linux/vmalloc.h> 2019-12-10 10:12:55 +01:00
vmap_stack.h mm: reorder includes after introduction of linux/pgtable.h 2020-06-09 09:39:13 -07:00
word-at-a-time.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
xor.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00