Rik van Riel c204d21f22 x86/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/20170622200033.25714-2-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>
Acked-by: 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

..

kmemcheck

x86/mm: Audit and remove any unnecessary uses of module.h

2016-07-14 13:04:20 +02:00

amdtopology.c

x86/boot/e820: Move asm/e820.h to asm/e820/api.h

2017-01-28 09:31:13 +01:00

debug_pagetables.c

x86/mm/ptdump: Make (debugfs)/kernel_page_tables read-only

2015-12-04 12:55:01 +01:00

dump_pagetables.c

x86/boot/64: Rename init_level4_pgt and early_level4_pgt

2017-06-13 08:56:55 +02:00

extable.c

x86/debug: Handle early WARN_ONs proper

2017-06-12 21:17:48 +02:00

fault.c

x86/mm: Split read_cr3() into read_cr3_pa() and __read_cr3()

2017-06-13 08:48:09 +02:00

highmem_32.c

x86/mm: Audit and remove any unnecessary uses of module.h

2016-07-14 13:04:20 +02:00

hugetlbpage.c

mm/hugetlb: add size parameter to huge_pte_offset()

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

ident_map.c

x86/mm: Add support for gbpages to kernel_ident_mapping_init()

2017-05-08 08:28:40 +02:00

init_32.c

mm, memory_hotplug: replace for_device by want_memblock in arch_add_memory

2017-07-06 16:24:32 -07:00

init_64.c

mm, memory_hotplug: replace for_device by want_memblock in arch_add_memory

2017-07-06 16:24:32 -07:00

init.c

Merge branch 'linus' into x86/mm, to pick up fixes

2017-06-22 10:57:28 +02:00

iomap_32.c

x86/mm: Audit and remove any unnecessary uses of module.h

2016-07-14 13:04:20 +02:00

ioremap.c

x86/mm: Split read_cr3() into read_cr3_pa() and __read_cr3()

2017-06-13 08:48:09 +02:00

kasan_init_64.c

x86/kasan: don't allocate extra shadow memory

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

kaslr.c

x86/mm: Add support for 5-level paging for KASLR

2017-06-13 08:56:58 +02:00

kmmio.c

x86/mm: Audit and remove any unnecessary uses of module.h

2016-07-14 13:04:20 +02:00

Makefile

x86/mm/gup: Switch GUP to the generic get_user_page_fast() implementation

2017-06-13 08:56:50 +02:00

mm_internal.h

x86: Enable PAT to use cache mode translation tables

2014-11-16 11:04:26 +01:00

mmap.c

x86/mmap: properly account for stack randomization in mmap_base

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

mmio-mod.c

x86/boot/e820: Move asm/e820.h to asm/e820/api.h

2017-01-28 09:31:13 +01:00

mpx.c

x86/mpx: Correctly report do_mpx_bt_fault() failures to user-space

2017-04-12 08:40:58 +02:00

numa_32.c

x86/mm/32: Set the '__vmalloc_start_set' flag in initmem_init()

2017-05-09 08:12:27 +02:00

numa_64.c

x86, mm: kill numa_free_all_bootmem()

2012-11-17 11:59:47 -08:00

numa_emulation.c

x86: delete __cpuinit usage from all x86 files

2013-07-14 19:36:56 -04:00

numa_internal.h

x86-32, mm: Rip out x86_32 NUMA remapping code

2013-01-31 14:12:30 -08:00

numa.c

Merge branch 'x86/boot' into x86/mm, to avoid conflict

2017-04-11 08:56:05 +02:00

pageattr-test.c

x86/mm/pat: Make mm/pageattr[-test].c explicitly non-modular

2015-08-25 09:48:38 +02:00

pageattr.c

x86, libnvdimm, pmem: move arch_invalidate_pmem() to libnvdimm

2017-06-27 16:29:00 -07:00

pat_internal.h

x86/mm/pat: Convert to pr_*() usage

2015-05-27 14:40:59 +02:00

pat_rbtree.c

x86/mm/pat: Use rb_entry()

2017-02-04 17:18:00 +01:00

pat.c

x86/mm/pat: Don't report PAT on CPUs that don't support it

2017-07-05 09:01:24 +02:00

pf_in.c

x86/mm: Audit and remove any unnecessary uses of module.h

2016-07-14 13:04:20 +02:00

pf_in.h

x86 mmiotrace: move files into arch/x86/mm/.

2008-05-24 11:25:37 +02:00

pgtable_32.c

Merge branch 'x86/boot' into x86/mm, to avoid conflict

2017-04-11 08:56:05 +02:00

pgtable.c

x86/mm: Add basic defines/helpers for CONFIG_X86_5LEVEL=y

2017-04-04 08:22:34 +02:00

physaddr.c

x86/mm: Audit and remove any unnecessary uses of module.h

2016-07-14 13:04:20 +02:00

physaddr.h

x86: split __phys_addr out into separate file

2009-09-10 11:48:55 -07:00

pkeys.c

x86/fpu: Finish excising 'eagerfpu'

2016-10-18 09:56:03 +02:00

setup_nx.c

Revert "x86/mm/32: Set NX in __supported_pte_mask before enabling paging"

2016-04-26 19:52:57 +02:00

srat.c

x86/boot/e820: Move asm/e820.h to asm/e820/api.h

2017-01-28 09:31:13 +01:00

testmmiotrace.c

Annotate hardware config module parameters in arch/x86/mm/

2017-04-04 16:54:21 +01:00

tlb.c

x86/mm: Delete a big outdated comment about TLB flushing

2017-06-30 10:12:35 +02:00