Thomas Garnier e33f8d3267 arm/syscalls: Optimize address limit check ... Disable the generic address limit check in favor of an architecture specific optimized implementation. The generic implementation using pending work flags did not work well with ARM and alignment faults. The address limit is checked on each syscall return path to user-mode path as well as the irq user-mode return function. If the address limit was changed, a function is called to report data corruption (stopping the kernel or process based on configuration). The address limit check has to be done before any pending work because they can reset the address limit and the process is killed using a SIGKILL signal. For example the lkdtm address limit check does not work because the signal to kill the process will reset the user-mode address limit. Signed-off-by: Thomas Garnier <thgarnie@google.com> Signed-off-by: Kees Cook <keescook@chromium.org> Tested-by: Kees Cook <keescook@chromium.org> Tested-by: Leonard Crestez <leonard.crestez@nxp.com> Reviewed-by: Kees Cook <keescook@chromium.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Pratyush Anand <panand@redhat.com> Cc: Dave Martin <Dave.Martin@arm.com> Cc: Will Drewry <wad@chromium.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Russell King <linux@armlinux.org.uk> Cc: Andy Lutomirski <luto@amacapital.net> Cc: David Howells <dhowells@redhat.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: linux-api@vger.kernel.org Cc: Yonghong Song <yhs@fb.com> Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1504798247-48833-4-git-send-email-keescook@chromium.org		2017-09-17 19:45:33 +02:00
..
.gitignore
arch_timer.c
armksyms.c	ARM: implement memset32 & memset64	2017-09-08 18:26:48 -07:00
asm-offsets.c
atags_compat.c
atags_parse.c
atags_proc.c
atags.h
bios32.c
cpuidle.c	ARM: Convert to using %pOF instead of full_name	2017-08-16 22:25:30 +02:00
crash_dump.c
debug.S
devtree.c	ARM: Convert to using %pOF instead of full_name	2017-08-16 22:25:30 +02:00
dma-isa.c
dma.c
early_printk.c
efi.c
elf.c
entry-armv.S	Merge branches 'fixes' and 'misc' into for-linus	2017-09-09 16:34:41 +01:00
entry-common.S	arm/syscalls: Optimize address limit check	2017-09-17 19:45:33 +02:00
entry-ftrace.S
entry-header.S
entry-v7m.S
fiq.c
fiqasm.S
ftrace.c
head-common.S
head-nommu.S
head.S	ARM: align .data section	2017-08-14 16:22:55 +01:00
hibernate.c
hw_breakpoint.c
hyp-stub.S	ARM: align .data section	2017-08-14 16:22:55 +01:00
insn.c
io.c
irq.c
isa.c
iwmmxt.S	ARM: align .data section	2017-08-14 16:22:55 +01:00
jump_label.c
kgdb.c
machine_kexec.c
Makefile
module-plts.c
module.c
module.lds
opcodes.c
paravirt.c
patch.c
perf_callchain.c
perf_event_v6.c
perf_event_v7.c
perf_event_xscale.c
perf_regs.c
pj4-cp0.c
process.c
psci_smp.c
ptrace.c
reboot.c
reboot.h
relocate_kernel.S
return_address.c
setup.c
signal.c	arm/syscalls: Optimize address limit check	2017-09-17 19:45:33 +02:00
sigreturn_codes.S
sleep.S	ARM: align .data section	2017-08-14 16:22:55 +01:00
smccc-call.S
smp_scu.c
smp_tlb.c
smp_twd.c
smp.c
stacktrace.c	ARM: 8691/1: Export save_stack_trace_tsk()	2017-09-09 16:26:42 +01:00
suspend.c
swp_emulate.c
sys_arm.c
sys_oabi-compat.c
tcm.c
thumbee.c
time.c
topology.c	ARM: Convert to using %pOF instead of full_name	2017-08-16 22:25:30 +02:00
traps.c
unwind.c
v7m.c
vdso.c
vmlinux-xip.lds.S
vmlinux.lds.S
xscale-cp0.c