AuxXxilium/linux_dsm_epyc7002
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561b5e0709
linux_dsm_epyc7002/mm
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Michal Hocko 561b5e0709 mm/mmap.c: do not blow on PROT_NONE MAP_FIXED holes in the stack 
Commit 1be7107fbe ("mm: larger stack guard gap, between vmas") has
introduced a regression in some rust and Java environments which are
trying to implement their own stack guard page.  They are punching a new
MAP_FIXED mapping inside the existing stack Vma.

This will confuse expand_{downwards,upwards} into thinking that the
stack expansion would in fact get us too close to an existing non-stack
vma which is a correct behavior wrt safety.  It is a real regression on
the other hand.

Let's work around the problem by considering PROT_NONE mapping as a part
of the stack.  This is a gros hack but overflowing to such a mapping
would trap anyway an we only can hope that usespace knows what it is
doing and handle it propely.

Fixes: 1be7107fbe ("mm: larger stack guard gap, between vmas")
Link: http://lkml.kernel.org/r/20170705182849.GA18027@dhcp22.suse.cz
Signed-off-by: Michal Hocko <mhocko@suse.com>
Debugged-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Ben Hutchings <ben@decadent.org.uk>
Cc: Willy Tarreau <w@1wt.eu>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-07-10 16:32:33 -07:00
..
kasan Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-05-10 10:30:46 -07:00
backing-dev.c
balloon_compaction.c mm/balloon_compaction.c: enqueue zero page to balloon device 2017-07-10 16:32:32 -07:00
bootmem.c
cleancache.c fs: switch ->s_uuid to uuid_t 2017-06-05 16:59:12 +02:00
cma_debug.c
cma.c cma: fix calculation of aligned offset 2017-07-10 16:32:32 -07:00
cma.h
compaction.c mm, compaction: skip over holes in __reset_isolation_suitable 2017-07-06 16:24:32 -07:00
debug_page_ref.c
debug.c
dmapool.c
early_ioremap.c
fadvise.c
failslab.c
filemap.c mm: hugetlb: return immediately for hugetlb page in __delete_from_page_cache() 2017-07-10 16:32:30 -07:00
frame_vector.c treewide: use kv[mz]alloc* rather than opencoded variants 2017-05-08 17:15:13 -07:00
frontswap.c
gup.c mm, gup: ensure real head page is ref-counted when using hugepages 2017-07-06 16:24:34 -07:00
highmem.c
huge_memory.c mm, THP, swap: check whether THP can be split firstly 2017-07-06 16:24:31 -07:00
hugetlb_cgroup.c
hugetlb.c hugetlb: add support for preferred node to alloc_huge_page_nodemask 2017-07-10 16:32:32 -07:00
hwpoison-inject.c mm: hwpoison: call shake_page() unconditionally 2017-05-03 15:52:12 -07:00
init-mm.c
internal.h mm, compaction: finish whole pageblock to reduce fragmentation 2017-05-08 17:15:10 -07:00
interval_tree.c
Kconfig powerpc updates for 4.13 2017-07-07 13:55:45 -07:00
Kconfig.debug mm: enable page poisoning early at boot 2017-05-03 15:52:10 -07:00
khugepaged.c mm: make PR_SET_THP_DISABLE immediately active 2017-07-10 16:32:31 -07:00
kmemcheck.c
kmemleak-test.c
kmemleak.c mm: kmemleak: treat vm_struct as alternative reference to vmalloc'ed objects 2017-07-06 16:24:34 -07:00
ksm.c ksm: optimize refile of stable_node_dup at the head of the chain 2017-07-06 16:24:31 -07:00
list_lru.c
maccess.c
madvise.c userfaultfd: non-cooperative: add madvise() event for MADV_FREE request 2017-07-10 16:32:32 -07:00
Makefile percpu: expose statistics about percpu memory via debugfs 2017-06-20 15:31:38 -04:00
memblock.c mm, memory_hotplug: move movable_node to the hotplug proper 2017-07-06 16:24:35 -07:00
memcontrol.c mm, memcg: fix potential undefined behavior in mem_cgroup_event_ratelimit() 2017-07-10 16:32:32 -07:00
memory_hotplug.c mm/memory_hotplug.c: remove unused local zone_type from __remove_zone() 2017-07-10 16:32:32 -07:00
memory-failure.c mm, hugetlb, soft_offline: use new_page_nodemask for soft offline migration 2017-07-10 16:32:32 -07:00
memory.c mm/memory.c: convert to DEFINE_DEBUGFS_ATTRIBUTE 2017-07-10 16:32:30 -07:00
mempolicy.c mm, mempolicy: don't check cpuset seqlock where it doesn't matter 2017-07-06 16:24:34 -07:00
mempool.c sched/wait: Rename wait_queue_t => wait_queue_entry_t 2017-06-20 12:18:27 +02:00
memtest.c
migrate.c mm/migrate.c: stabilise page count when migrating transparent hugepages 2017-07-10 16:32:31 -07:00
mincore.c
mlock.c mlock: fix mlock count can not decrease in race condition 2017-06-02 15:07:38 -07:00
mm_init.c
mmap.c mm/mmap.c: do not blow on PROT_NONE MAP_FIXED holes in the stack 2017-07-10 16:32:33 -07:00
mmu_context.c
mmu_notifier.c
mmzone.c
mprotect.c mm: drop NULL return check of pte_offset_map_lock() 2017-07-06 16:24:33 -07:00
mremap.c
msync.c
nobootmem.c mm/nobootmem.c: return 0 when start_pfn equals end_pfn 2017-07-06 16:24:31 -07:00
nommu.c mm, vmalloc: use __GFP_HIGHMEM implicitly 2017-05-08 17:15:13 -07:00
oom_kill.c mm/oom_kill.c: add tracepoints for oom reaper-related events 2017-07-10 16:32:32 -07:00
page_alloc.c mm/page_alloc.c: eliminate unsigned confusion in __rmqueue_fallback 2017-07-10 16:32:32 -07:00
page_counter.c
page_ext.c mm: enable page poisoning early at boot 2017-05-03 15:52:10 -07:00
page_idle.c mm: make rmap_one boolean function 2017-05-03 15:52:10 -07:00
page_io.c swap: add block io poll in swapin path 2017-07-10 16:32:30 -07:00
page_isolation.c mm: unify new_node_page and alloc_migrate_target 2017-07-10 16:32:31 -07:00
page_owner.c mm: avoid taking zone lock in pagetypeinfo_showmixed() 2017-07-10 16:32:32 -07:00
page_poison.c mm: enable page poisoning early at boot 2017-05-03 15:52:10 -07:00
page_vma_mapped.c mm/hugetlb: add size parameter to huge_pte_offset() 2017-07-06 16:24:34 -07:00
page-writeback.c Writeback error handling fixes (pile #1) 2017-07-07 18:39:15 -07:00
pagewalk.c mm/hugetlb: add size parameter to huge_pte_offset() 2017-07-06 16:24:34 -07:00
percpu-internal.h percpu: fix early calls for spinlock in pcpu_stats 2017-06-21 13:53:52 -04:00
percpu-km.c percpu: fix static checker warnings in pcpu_destroy_chunk 2017-06-29 11:23:38 -04:00
percpu-stats.c percpu: expose statistics about percpu memory via debugfs 2017-06-20 15:31:38 -04:00
percpu-vm.c percpu: fix static checker warnings in pcpu_destroy_chunk 2017-06-29 11:23:38 -04:00
percpu.c percpu: resolve err may not be initialized in pcpu_alloc 2017-06-21 12:00:45 -04:00
pgtable-generic.c
process_vm_access.c
quicklist.c
readahead.c
rmap.c mm: memcontrol: per-lruvec stats infrastructure 2017-07-06 16:24:35 -07:00
rodata_test.c mm: remove rodata_test_data export, add pr_fmt 2017-05-03 15:52:09 -07:00
shmem.c mm: make PR_SET_THP_DISABLE immediately active 2017-07-10 16:32:31 -07:00
slab_common.c mm: allow slab_nomerge to be set at build time 2017-07-06 16:24:31 -07:00
slab.c mm: memcontrol: account slab stats per lruvec 2017-07-06 16:24:35 -07:00
slab.h mm: memcontrol: account slab stats per lruvec 2017-07-06 16:24:35 -07:00
slob.c
slub.c mm: memcontrol: account slab stats per lruvec 2017-07-06 16:24:35 -07:00
sparse-vmemmap.c
sparse.c mm, memory_hotplug: do not associate hotadded memory to zones until online 2017-07-06 16:24:32 -07:00
swap_cgroup.c mm, THP, swap: delay splitting THP during swap out 2017-07-06 16:24:31 -07:00
swap_slots.c mm/swap_slots.c: don't disable preemption while taking the per-CPU cache 2017-07-10 16:32:32 -07:00
swap_state.c swap: add block io poll in swapin path 2017-07-10 16:32:30 -07:00
swap.c mm: per-cgroup memory reclaim stats 2017-07-06 16:24:35 -07:00
swapfile.c swap: add block io poll in swapin path 2017-07-10 16:32:30 -07:00
truncate.c mm/truncate.c: fix THP handling in invalidate_mapping_pages() 2017-07-10 16:32:32 -07:00
usercopy.c
userfaultfd.c
util.c mm: clarify why we want kmalloc before falling backto vmallock 2017-06-02 15:07:37 -07:00
vmacache.c
vmalloc.c vmalloc: show lazy-purged vma info in vmallocinfo 2017-07-10 16:32:31 -07:00
vmpressure.c mm, vmpressure: pass-through notification support 2017-07-10 16:32:31 -07:00
vmscan.c mm, vmscan: avoid thrashing anon lru when free + file is low 2017-07-10 16:32:30 -07:00
vmstat.c mm: avoid taking zone lock in pagetypeinfo_showmixed() 2017-07-10 16:32:32 -07:00
workingset.c mm: memcontrol: per-lruvec stats infrastructure 2017-07-06 16:24:35 -07:00
z3fold.c
zbud.c
zpool.c
zsmalloc.c mm/zsmalloc.c: fix -Wunneeded-internal-declaration warning 2017-07-10 16:32:30 -07:00
zswap.c mm/zswap.c: delete an error message for a failed memory allocation in zswap_dstmem_prepare() 2017-07-06 16:24:35 -07:00