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109c32ffd8
linux/arch/mips
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Matt Redfearn 109c32ffd8 MIPS: Add support for ARCH_MMAP_RND_{COMPAT_}BITS 
arch_mmap_rnd() uses hard-coded limits of 16MB for the randomisation
of mmap within 32bit processes and 256MB in 64bit processes. Since v4.4
other arches support tuning this value in /proc/sys/vm/mmap_rnd_bits.
Add support for this to MIPS.

Set the minimum(default) number of bits randomisation for 32bit to 8 -
which with 4k pagesize is unchanged from the current 16MB total
randomness. The minimum(default) for 64bit is 12bits, again with 4k
pagesize this is the same as the current 256MB.

This patch is necessary for MIPS32 to pass the Android CTS tests, with
the number of random bits set to 15.

Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Daniel Cashman <dcashman@android.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-mips@linux-mips.org
Cc: kernel-hardening@lists.openwall.com
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/14617/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-01-03 16:34:43 +01:00
..
alchemy clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
ar7 MIPS: ar7: use gpiochip data pointer 2016-02-19 09:51:43 +01:00
ath25 genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
ath79 MIPS: ath79: Fix error handling 2017-01-03 16:34:39 +01:00
bcm47xx MIPS: BCM47xx: Make serial explicitly non-modular 2016-10-04 16:13:57 +02:00
bcm63xx MIPS: BCM63xx: Let clk_disable() return immediately if clk is NULL 2016-10-04 16:13:57 +02:00
bmips MIPS: BMIPS: Support APPENDED_DTB 2016-10-06 17:31:02 +02:00
boot MIPS: DTS: img: add device tree for Marduk board 2017-01-03 16:34:41 +01:00
cavium-octeon MIPS: SMP: Remove cpu_callin_map 2017-01-03 16:34:38 +01:00
cobalt MIPS: Cobalt: Fix typo 2016-08-03 08:16:30 +02:00
configs MIPS: Lantiq: Activate more drivers in default configuration 2017-01-03 16:34:43 +01:00
dec Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
emma
fw MIPS: Fix misspellings in comments. 2016-04-03 12:32:09 +02:00
generic MIPS: generic: Fix KASLR for generic kernel. 2016-11-04 00:32:06 +01:00
include MIPS: Loongson1: Add watchdog support for Loongson1 board 2017-01-03 16:34:42 +01:00
jazz Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
jz4740 clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
kernel MIPS: Remove r2_emul_return from struct thread_info 2017-01-03 16:34:41 +01:00
kvm KVM: MIPS: Precalculate MMIO load resume PC 2016-10-26 13:43:55 +02:00
lantiq MIPS: Lantiq: Fix mask of GPE frequency 2016-12-11 11:20:25 +01:00
lasat mips: separate extable.h, switch module.h to it 2016-10-05 18:36:18 -04:00
lib MIPS: dump_tlb: Fix printk continuations 2016-11-04 01:04:32 +01:00
loongson32 MIPS: Loongson1: Add watchdog support for Loongson1 board 2017-01-03 16:34:42 +01:00
loongson64 MIPS: SMP: Remove cpu_callin_map 2017-01-03 16:34:38 +01:00
math-emu Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
mm MIPS: Add support for ARCH_MMAP_RND_{COMPAT_}BITS 2017-01-03 16:34:43 +01:00
mti-malta clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
net treewide: remove redundant #include <linux/kconfig.h> 2016-10-11 15:06:33 -07:00
netlogic MIPS: Netlogic: Exclude netlogic,xlp-pic code from XLR builds 2017-01-03 16:34:38 +01:00
oprofile Merge branch 'smp-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-12-25 14:05:56 -08:00
paravirt
pci MIPS: TXx9: Modernize printing of kernel messages 2017-01-03 16:34:32 +01:00
pic32 Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2016-08-06 09:13:11 -04:00
pistachio Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2016-08-06 09:13:11 -04:00
pmcs-msp71xx MIPS: MSP71xx: Use __flush_cache_all instead of flush_cache_all. 2016-05-13 14:01:38 +02:00
pnx833x MIPS: Squash lines for simple wrapper functions 2016-10-04 16:13:57 +02:00
power
ralink ralink: Introduce fw_passed_dtb to arch/mips/ralink 2017-01-03 16:34:43 +01:00
rb532 MIPS: rb532: use gpiochip data pointer 2016-02-19 09:51:44 +01:00
sgi-ip22 Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
sgi-ip27 clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
sgi-ip32 Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
sibyte Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
sni char/genrtc: remove asm-generic/rtc.h from mips 2016-06-04 00:23:36 +02:00
txx9 MIPS: TXx9: Modernize printing of kernel messages 2017-01-03 16:34:32 +01:00
vdso MIPS: VDSO: Drop duplicated -I*/-E* aflags 2016-10-11 15:07:30 +02:00
vr41xx MIPS: VR41xx: Fix typo 2016-05-28 12:35:09 +02:00
xilfpga MIPS: xilfpga: Use irqchip instead of the legacy way 2017-01-03 16:34:39 +01:00
Kbuild MIPS: Initial implementation of a VDSO 2015-11-11 08:36:36 +01:00
Kbuild.platforms MIPS: generic: Convert SEAD-3 to a generic board 2016-10-06 18:04:20 +02:00
Kconfig MIPS: Add support for ARCH_MMAP_RND_{COMPAT_}BITS 2017-01-03 16:34:43 +01:00
Kconfig.debug MIPS: Remove compact branch policy Kconfig entries 2016-09-13 14:14:50 +02:00
Makefile MIPS: Use Makefile.postlink to insert relocations into vmlinux 2017-01-03 16:34:37 +01:00
Makefile.postlink MIPS: Use Makefile.postlink to insert relocations into vmlinux 2017-01-03 16:34:37 +01:00