Will Deacon 5c2450ac7c arm64: compat: Ensure upper 32 bits of x0 are zero on syscall return ... commit 15956689a0 upstream. 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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2020-07-22 09:33:16 +02:00
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boot	arm64: dts: spcfpga: Align GIC, NAND and UART nodenames with dtschema	2020-07-22 09:33:04 +02:00
configs	arm64/ARM: configs: Change CONFIG_REMOTEPROC from m to y	2019-09-30 11:48:00 -07:00
crypto	crypto: arch/nhpoly1305 - process in explicit 4k chunks	2020-05-14 07:58:25 +02:00
include	arm64: compat: Ensure upper 32 bits of x0 are zero on syscall return	2020-07-22 09:33:16 +02:00
kernel	arm64: compat: Ensure upper 32 bits of x0 are zero on syscall return	2020-07-22 09:33:16 +02:00
kvm	KVM: arm64: Fix kvm_reset_vcpu() return code being incorrect with SVE	2020-07-16 08:16:44 +02:00
lib	arm64: uaccess: Remove uaccess_*_not_uao asm macros	2019-11-20 18:51:54 +00:00
mm	arm64: hugetlb: avoid potential NULL dereference	2020-05-14 07:58:26 +02:00
net	arm64: bpf: optimize modulo operation	2019-09-03 15:44:40 +02:00
xen	xen/efi: have a common runtime setup function	2019-10-02 10:31:07 -04:00
Kbuild	arm64: add arch/arm64/Kbuild	2019-08-21 18:47:15 +01:00
Kconfig	arm64: errata: Hide CTR_EL0.DIC on systems affected by Neoverse-N1 #1542419	2020-04-29 16:32:56 +02:00
Kconfig.debug	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
Kconfig.platforms	arm64: exynos: Enable exynos-chipid driver	2019-09-04 22:43:26 +02:00
Makefile	arm64: Always force a branch protection mode when the compiler has one	2020-04-17 10:50:23 +02:00