+ mm-sparse-more-check-on-mem_section-number.patch added to -mm tree

+ mm-sparse-more-check-on-mem_section-number.patch added to -mm tree

[akpm]

The patch titled
     Subject: mm/sparse: more checks on mem_section number
has been added to the -mm tree.  Its filename is
     mm-sparse-more-check-on-mem_section-number.patch

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------------------------------------------------------
From: Gavin Shan <shangw@linux.vnet.ibm.com>
Subject: mm/sparse: more checks on mem_section number

__section_nr() was implemented to retrieve the corresponding memory
section number according to its descriptor.  It's possible that the
specified memory section descriptor doesn't exist in the global array.  So
add more checking on that and report an error for a wrong case.

Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/sparse.c |    2 ++
 1 file changed, 2 insertions(+)

diff -puN mm/sparse.c~mm-sparse-more-check-on-mem_section-number mm/sparse.c
--- a/mm/sparse.c~mm-sparse-more-check-on-mem_section-number
+++ a/mm/sparse.c
@@ -130,6 +130,8 @@ int __section_nr(struct mem_section* ms)
 		     break;
 	}
 
+	VM_BUG_ON(root_nr == NR_SECTION_ROOTS);
+
 	return (root_nr * SECTIONS_PER_ROOT) + (ms - root);
 }
 
_
Subject: Subject: mm/sparse: more checks on mem_section number

Patches currently in -mm which might be from shangw@linux.vnet.ibm.com are

linux-next.patch
mm-slab-remove-duplicate-check.patch
mm-buddy-cleanup-on-should_fail_alloc_page.patch
mm-compaction-cleanup-on-compaction_deferred.patch
memcg-add-mem_cgroup_from_css-helper.patch
memcg-add-mem_cgroup_from_css-helper-fix.patch
memcg-add-mem_cgroup_from_css-helper-fix-2.patch
mm-sparse-optimize-sparse_index_alloc.patch
mm-sparse-more-check-on-mem_section-number.patch
mm-sparse-remove-index_init_lock.patch