linux/arch/arm64
EunTaik Lee 52d7523d84 arm64: mm: allow the kernel to handle alignment faults on user accesses
Although we don't expect to take alignment faults on access to normal
memory, misbehaving (i.e. buggy) user code can pass MMIO pointers into
system calls, leading to things like get_user accessing device memory.

Rather than OOPS the kernel, allow any exception fixups to run and
return something like -EFAULT back to userspace. This makes the
behaviour more consistent with userspace, even though applications with
access to device mappings can easily cause other issues if they try
hard enough.

Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Eun Taik Lee <eun.taik.lee@samsung.com>
[will: dropped __kprobes annotation and rewrote commit mesage]
Signed-off-by: Will Deacon <will.deacon@arm.com>
2016-02-19 12:20:37 +00:00
..
boot arm64: kbuild: make "make install" not depend on vmlinux 2016-02-19 10:33:35 +00:00
configs arm64: defconfig: updates for 4.5 2016-01-26 11:24:41 +00:00
crypto arm/arm64: crypto: assure that ECB modes don't require an IV 2016-02-15 15:48:29 +00:00
include arm64: asm: Explicitly include linux/personality.h in asm/page.h 2016-02-03 19:22:02 +00:00
kernel arm64/efi: Make strnlen() available to the EFI namespace 2016-02-16 10:32:10 +00:00
kvm arm64: KVM: Add support for 16-bit VMID 2015-12-18 10:15:12 +00:00
lib arm64/efi: Make strnlen() available to the EFI namespace 2016-02-16 10:32:10 +00:00
mm arm64: mm: allow the kernel to handle alignment faults on user accesses 2016-02-19 12:20:37 +00:00
net arm64: bpf: add extra pass to handle faulty codegen 2016-01-17 19:15:26 -05:00
xen xen/arm: introduce HYPERVISOR_platform_op on arm and arm64 2015-12-21 14:40:56 +00:00
Kconfig dma-mapping: always provide the dma_map_ops based implementation 2016-01-20 17:09:18 -08:00
Kconfig.debug arch: consolidate CONFIG_STRICT_DEVM in lib/Kconfig.debug 2016-01-09 06:30:49 -08:00
Kconfig.platforms ARM: SoC support for Tegra platforms for v4.5 2016-01-22 17:30:52 -08:00
Makefile arm64: kbuild: make "make install" not depend on vmlinux 2016-02-19 10:33:35 +00:00