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072b1b62a6
linux/arch/arm64/include/asm
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Steve Capper 072b1b62a6 ARM64: mm: Make PAGE_NONE pages read only and no-execute. 
If we consider the following code sequence:

	my_pte = pte_modify(entry, myprot);
	x = pte_write(my_pte);
	y = pte_exec(my_pte);

If myprot comes from a PROT_NONE page, then x and y will both be
true which is undesireable behaviour.

This patch sets the no-execute and read-only bits for PAGE_NONE
such that the code above will return false for both x and y.

Signed-off-by: Steve Capper <steve.capper@linaro.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
2013-06-14 09:42:46 +01:00
..
arch_timer.h ARM: convert arm/arm64 arch timer to use CLKSRC_OF init 2013-04-11 15:11:15 -05:00
asm-offsets.h
assembler.h arm64: debug: fix mdscr.ss check when enabling debug exceptions 2013-05-17 18:24:19 +01:00
atomic.h arm64: atomics: fix grossly inconsistent asm constraints for exclusives 2013-02-11 18:16:41 +00:00
barrier.h arm64: Miscellaneous header files 2012-09-17 13:42:21 +01:00
bitops.h arm64: klib: Optimised atomic bitops 2013-03-21 17:39:31 +00:00
cache.h arm64: Cache maintenance routines 2012-09-17 13:42:00 +01:00
cacheflush.h arm64: Convert empty flush_cache_{mm,page} functions to static inline 2012-11-23 18:15:32 +00:00
cachetype.h arm64: Cache maintenance routines 2012-09-17 13:42:00 +01:00
cmpxchg.h arm64: Define cmpxchg64 and cmpxchg64_local for outside use 2013-04-23 11:47:26 +01:00
compat.h arm64: Fix compat types affecting struct compat_stat 2013-04-25 17:45:50 +01:00
compiler.h arm64: Miscellaneous header files 2012-09-17 13:42:21 +01:00
cputable.h arm64: CPU support 2012-09-17 13:41:59 +01:00
cputype.h arm64: head: match all affinity levels in the pen of the secondaries 2013-03-20 18:09:42 +00:00
debug-monitors.h arm64: Debugging support 2012-09-17 13:42:14 +01:00
device.h arm64: Device specific operations 2012-09-17 13:42:04 +01:00
dma-mapping.h ARM64: dma_debug: add debug_dma_mapping_error support 2012-11-28 15:28:57 +01:00
elf.h arm64: elf: fix core dumping to match what glibc expects 2013-01-22 17:50:59 +00:00
esr.h arm64: add explicit symbols to ESR_EL1 decoding 2013-04-17 15:58:25 +01:00
exception.h arm64: Use irqchip_init() for interrupt controller initialisation 2013-03-26 16:02:23 +00:00
exec.h arm64: Miscellaneous header files 2012-09-17 13:42:21 +01:00
fb.h arm64: Device specific operations 2012-09-17 13:42:04 +01:00
fpsimd.h arm64: elf: fix core dumping definitions for GP and FP registers 2012-11-08 16:06:20 +00:00
fpsimdmacros.h arm64: move FP-SIMD save/restore code to a macro 2012-12-05 11:26:50 +00:00
futex.h arm64: atomics: fix grossly inconsistent asm constraints for exclusives 2013-02-11 18:16:41 +00:00
hardirq.h arm64: Use irqchip_init() for interrupt controller initialisation 2013-03-26 16:02:23 +00:00
hw_breakpoint.h arm64: Debugging support 2012-09-17 13:42:14 +01:00
hwcap.h UAPI: (Scripted) Disintegrate arch/arm64/include/asm 2012-10-11 11:05:13 +01:00
io.h arm64: Define readq and writeq for driver module using 2013-04-19 13:57:46 +01:00
irq.h arm64: Use irqchip_init() for interrupt controller initialisation 2013-03-26 16:02:23 +00:00
irqflags.h arm64: IRQ handling 2012-09-17 13:42:02 +01:00
Kbuild arm64: compiling issue, need add include/asm/vga.h file 2013-04-25 17:45:47 +01:00
linkage.h arm64: fix alignment padding in assembly code 2012-10-20 11:12:01 +01:00
memblock.h arm64: MMU initialisation 2012-09-17 13:41:56 +01:00
memory.h arm64: Add simple earlyprintk support 2013-01-22 17:51:01 +00:00
mmu_context.h arm64: mm: update CONTEXTIDR register to contain PID of current process 2013-02-11 18:24:18 +00:00
mmu.h arm64: Add simple earlyprintk support 2013-01-22 17:51:01 +00:00
module.h arm64: Loadable modules 2012-09-17 13:42:19 +01:00
page.h arm64: MMU fault handling and page table management 2012-09-17 13:41:57 +01:00
perf_event.h arm64: perf: add guest vs host discrimination 2013-01-29 16:56:17 +00:00
pgalloc.h arm64: MMU fault handling and page table management 2012-09-17 13:41:57 +01:00
pgtable-2level-hwdef.h arm64: MMU definitions 2012-09-17 13:41:56 +01:00
pgtable-2level-types.h arm64: MMU definitions 2012-09-17 13:41:56 +01:00
pgtable-3level-hwdef.h arm64: MMU definitions 2012-09-17 13:41:56 +01:00
pgtable-3level-types.h arm64: MMU definitions 2012-09-17 13:41:56 +01:00
pgtable-hwdef.h arm64: Distinguish between user and kernel XN bits 2012-11-16 15:50:25 +00:00
pgtable.h ARM64: mm: Make PAGE_NONE pages read only and no-execute. 2013-06-14 09:42:46 +01:00
pmu.h arm64: Performance counters support 2012-09-17 13:42:17 +01:00
proc-fns.h arm64: CPU support 2012-09-17 13:41:59 +01:00
processor.h Merge branch 'arch-microblaze' into no-rebases 2012-11-16 22:28:43 -05:00
prom.h arm64: Build infrastructure 2012-09-17 13:42:21 +01:00
psci.h arm64: psci: add support for PSCI invocations from the kernel 2013-01-29 16:56:37 +00:00
ptrace.h arm64: add COMPAT_PSR_*_BIT flags 2013-01-29 16:56:17 +00:00
shmparam.h arm64: ELF definitions 2012-09-17 13:42:07 +01:00
sigcontext.h UAPI: (Scripted) Disintegrate arch/arm64/include/asm 2012-10-11 11:05:13 +01:00
signal32.h arm64: 32-bit (compat) applications support 2012-09-17 13:42:12 +01:00
smp_plat.h arm64: kernel: initialise cpu_logical_map from the DT 2013-03-20 17:26:24 +00:00
smp.h arm64: SMP: enable PSCI boot method 2013-01-29 16:56:37 +00:00
sparsemem.h arm64: MMU definitions 2012-09-17 13:41:56 +01:00
spinlock_types.h arm64: SMP support 2012-09-17 13:42:06 +01:00
spinlock.h arm64: atomics: fix grossly inconsistent asm constraints for exclusives 2013-02-11 18:16:41 +00:00
stacktrace.h arm64: Exception handling 2012-09-17 10:24:46 +01:00
stat.h UAPI: (Scripted) Disintegrate arch/arm64/include/asm 2012-10-11 11:05:13 +01:00
string.h arm64: klib: Optimised string functions 2013-03-21 17:39:30 +00:00
syscall.h arm64: Miscellaneous library functions 2012-09-17 13:42:18 +01:00
syscalls.h arm64: switch to generic sigaltstack 2013-02-14 09:17:29 -05:00
system_misc.h arm64: vexpress: Add support for poweroff/restart 2013-05-08 10:23:00 +01:00
thread_info.h arm64: Process management 2012-09-17 13:41:58 +01:00
timex.h arm64: Generic timers support 2012-09-17 13:42:20 +01:00
tlb.h arm64: TLB maintenance functionality 2012-09-17 13:42:01 +01:00
tlbflush.h arm64: TLB maintenance functionality 2012-09-17 13:42:01 +01:00
traps.h arm64: Exception handling 2012-09-17 10:24:46 +01:00
uaccess.h arm64: User access library functions 2012-09-17 13:42:11 +01:00
ucontext.h arm64: fix padding computation in struct ucontext 2013-03-18 10:42:16 +00:00
unistd32.h unify compat fanotify_mark(2), switch to COMPAT_SYSCALL_DEFINE 2013-05-09 13:46:38 -04:00
unistd.h burying unused conditionals 2013-02-14 09:21:15 -05:00
vdso_datapage.h arm64: VDSO support 2012-09-17 13:42:09 +01:00
vdso.h arm64: VDSO support 2012-09-17 13:42:09 +01:00
virt.h arm64: add hypervisor stub 2012-12-05 11:26:49 +00:00