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8f0d3aa9de
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Daniel Cashman 8f0d3aa9de arm64: mm: support ARCH_MMAP_RND_BITS 
arm64: arch_mmap_rnd() uses STACK_RND_MASK to generate the random offset
for the mmap base address.  This value represents a compromise between
increased ASLR effectiveness and avoiding address-space fragmentation.
Replace it with a Kconfig option, which is sensibly bounded, so that
platform developers may choose where to place this compromise.  Keep
default values as new minimums.

Signed-off-by: Daniel Cashman <dcashman@google.com>
Cc: Russell King <linux@arm.linux.org.uk>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Heinrich Schuchardt <xypron.glpk@gmx.de>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: David Rientjes <rientjes@google.com>
Cc: Mark Salyzyn <salyzyn@android.com>
Cc: Jeff Vander Stoep <jeffv@google.com>
Cc: Nick Kralevich <nnk@google.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Hector Marco-Gisbert <hecmargi@upv.es>
Cc: Borislav Petkov <bp@suse.de>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-01-14 16:00:49 -08:00
..
alpha soreuseport: setsockopt SO_ATTACH_REUSEPORT_[CE]BPF 2016-01-04 22:49:59 -05:00
arc ARC: dw2 unwind: Catch Dwarf SNAFUs early 2015-12-21 14:01:49 +05:30
arm arm: mm: support ARCH_MMAP_RND_BITS 2016-01-14 16:00:49 -08:00
arm64 arm64: mm: support ARCH_MMAP_RND_BITS 2016-01-14 16:00:49 -08:00
avr32 soreuseport: setsockopt SO_ATTACH_REUSEPORT_[CE]BPF 2016-01-04 22:49:59 -05:00
blackfin MTD updates for v4.5: 2016-01-13 11:25:54 -08:00
c6x Merge branch 'for-linux-next' of git://linux-c6x.org/git/projects/linux-c6x-upstreaming 2016-01-12 13:00:16 -08:00
cris cris: nand: remove useless mtd->priv = chip assignments 2015-12-18 13:22:11 -08:00
frv libnvdimm for 4.5 2016-01-13 19:15:14 -08:00
h8300 h8300: Rename ctlr_out/in[bwl] to raw_read/write[bwl] 2015-12-15 10:12:03 +01:00
hexagon Linux 4.3-rc4 2015-10-06 17:10:28 +02:00
ia64 ia64: split off early_ioremap() declarations into asm/early_ioremap.h 2016-01-13 10:35:14 -08:00
m32r m32r: fix m32104ut_defconfig build fail 2016-01-14 16:00:49 -08:00
m68k Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2016-01-12 17:11:47 -08:00
metag metag: ftrace: Fix the comments for ftrace_modify_code 2015-12-23 14:27:25 -05:00
microblaze Revert "scatterlist: use sg_phys()" 2015-12-15 12:54:06 -08:00
mips MTD updates for v4.5: 2016-01-13 11:25:54 -08:00
mn10300 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2016-01-12 18:57:02 -08:00
nios2 nios2: fix cache coherency 2015-11-26 22:25:58 +08:00
openrisc
parisc soreuseport: setsockopt SO_ATTACH_REUSEPORT_[CE]BPF 2016-01-04 22:49:59 -05:00
powerpc kmemcg: account certain kmem allocations to memcg 2016-01-14 16:00:49 -08:00
s390 mm, shmem: add internal shmem resident memory accounting 2016-01-14 16:00:49 -08:00
score Merge branch 'strscpy' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile 2015-10-04 16:31:13 +01:00
sh MTD updates for v4.5: 2016-01-13 11:25:54 -08:00
sparc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2016-01-12 18:57:02 -08:00
tile libnvdimm for 4.5 2016-01-13 19:15:14 -08:00
um Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2016-01-12 17:11:47 -08:00
unicore32 arch: consolidate CONFIG_STRICT_DEVM in lib/Kconfig.debug 2016-01-09 06:30:49 -08:00
x86 libnvdimm for 4.5 2016-01-13 19:15:14 -08:00
xtensa Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2016-01-12 18:57:02 -08:00
.gitignore
Kconfig mm: mmap: add new /proc tunable for mmap_base ASLR 2016-01-14 16:00:49 -08:00