Martin Schwidefsky 8ab867cb08 s390/mm: fix BUG_ON in crst_table_upgrade ...

A 31-bit compat process can force a BUG_ON in crst_table_upgrade
with specific, invalid mmap calls, e.g.

   mmap((void*) 0x7fff8000, 0x10000, 3, 32, -1, 0)

The arch_get_unmapped_area[_topdown] functions miss an if condition
in the decision to do a page table upgrade.

Fixes: 9b11c7912d00 ("s390/mm: simplify arch_get_unmapped_area[_topdown]")
Cc: <stable@vger.kernel.org>  # v4.12+
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

2017-08-31 14:03:21 +02:00

..

cmm.c

s390: mm: Audit and remove any unnecessary uses of module.h

2017-02-17 07:40:35 +01:00

dump_pagetables.c

s390/mm: implement 5 level pages tables

2017-06-12 16:25:54 +02:00

extmem.c

s390: mm: Audit and remove any unnecessary uses of module.h

2017-02-17 07:40:35 +01:00

fault.c

s390/fault: use _ASCE_ORIGIN instead of PAGE_MASK

2017-06-12 16:25:59 +02:00

gmap.c

s390/mm: add __rcu annotations

2017-06-12 16:25:55 +02:00

gup.c

s390/mm: implement 5 level pages tables

2017-06-12 16:25:54 +02:00

hugetlbpage.c

mm/hugetlb: add size parameter to huge_pte_offset()

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

init.c

mm, memory_hotplug: replace for_device by want_memblock in arch_add_memory

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

maccess.c

s390/maccess: reduce stnsm instructions

2016-02-17 09:05:04 +01:00

Makefile

s390/extable: use generic search and sort routines

2016-03-22 15:36:02 -07:00

mem_detect.c

s390: mm: Audit and remove any unnecessary uses of module.h

2017-02-17 07:40:35 +01:00

mmap.c

s390/mm: fix BUG_ON in crst_table_upgrade

2017-08-31 14:03:21 +02:00

page-states.c

s390/kvm: Add PGSTE manipulation functions

2017-04-20 13:33:08 +02:00

pageattr.c

s390/mm: implement 5 level pages tables

2017-06-12 16:25:54 +02:00

pgalloc.c

s390/mm: implement 5 level pages tables

2017-06-12 16:25:54 +02:00

pgtable.c

s390/mm: set change and reference bit on lazy key enablement

2017-07-13 11:28:29 +02:00

vmem.c

s390/mm: implement 5 level pages tables

2017-06-12 16:25:54 +02:00