Rik van Riel cf92251dc5 arm64/mmap: properly account for stack randomization in mmap_base ...

When RLIMIT_STACK is, for example, 256MB, the current code results in a
gap between the top of the task and mmap_base of 256MB, failing to take
into account the amount by which the stack address was randomized.  In
other words, the stack gets less than RLIMIT_STACK space.

Ensure that the gap between the stack and mmap_base always takes stack
randomization and the stack guard gap into account.

Obtained from Daniel Micay's linux-hardened tree.

Link: http://lkml.kernel.org/r/20170622200033.25714-3-riel@redhat.com
Signed-off-by: Daniel Micay <danielmicay@gmail.com>
Signed-off-by: Rik van Riel <riel@redhat.com>
Reported-by: Florian Weimer <fweimer@redhat.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Daniel Micay <danielmicay@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Hugh Dickins <hughd@google.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2017-07-12 16:26:03 -07:00

..

cache.S

arm64: don't pull uaccess.h into *.S

2016-12-26 13:05:17 -05:00

context.c

arm64: cache: Remove support for ASID-tagged VIVT I-caches

2017-03-20 16:16:57 +00:00

copypage.c

arm64: Defer dcache flush in __cpu_copy_user_page

2015-12-17 11:07:13 +00:00

dma-mapping.c

Merge tag 'dma-mapping-4.13' of git://git.infradead.org/users/hch/dma-mapping

2017-07-06 19:20:54 -07:00

dump.c

arm64: dump: Add checking for writable and exectuable pages

2016-11-07 18:15:04 +00:00

extable.c

arm64: migrate exception table users off module.h and onto extable.h

2016-09-20 09:36:21 +01:00

fault.c

Merge branch 'aarch64/for-next/ras-apei' into aarch64/for-next/core

2017-06-26 10:54:27 +01:00

flush.c

arm64: cache: Merge cachetype.h into cache.h

2017-03-20 16:16:59 +00:00

hugetlbpage.c

mm/hugetlb: add size parameter to huge_pte_offset()

2017-07-06 16:24:34 -07:00

init.c

arm64: kdump: provide /proc/vmcore file

2017-04-05 18:31:38 +01:00

ioremap.c

arm64: use is_vmalloc_addr

2017-02-09 13:47:56 +00:00

kasan_init.c

arm64/kasan: don't allocate extra shadow memory

2017-07-10 16:32:33 -07:00

Makefile

arm64: Add support for CONFIG_DEBUG_VIRTUAL

2017-01-12 15:05:39 +00:00

mmap.c

arm64/mmap: properly account for stack randomization in mmap_base

2017-07-12 16:26:03 -07:00

mmu.c

arm64: mm: explicity include linux/vmalloc.h

2017-05-30 11:07:42 +01:00

numa.c

ACPI/NUMA: Do not map pxm to node when NUMA is turned off

2016-12-15 11:32:32 +01:00

pageattr.c

arm64: use set_memory.h header

2017-05-08 17:15:13 -07:00

pgd.c

arm64: mm: drop fixup_init() and mm.h

2016-09-06 19:09:38 +01:00

physaddr.c

arm64: Add support for CONFIG_DEBUG_VIRTUAL

2017-01-12 15:05:39 +00:00

proc.S

arm64: Avoid clobbering mm in erratum workaround on QDF2400

2017-02-24 10:55:31 +00:00

ptdump_debugfs.c

arm64: dump: Make ptdump debugfs a separate option

2016-11-07 18:15:04 +00:00