mm: fix invalid node in alloc_migrate_target()
authorXishi Qiu <qiuxishi@huawei.com>
Fri, 1 Apr 2016 21:31:20 +0000 (14:31 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 1 Apr 2016 22:03:37 +0000 (17:03 -0500)
commit6f25a14a7053b69917e2ebea0d31dd444cd31fd5
tree48914967e96ffd5e054252cab541f15f768323ee
parent969e8d7e47f93ef693028667480558de8f70523f
mm: fix invalid node in alloc_migrate_target()

It is incorrect to use next_node to find a target node, it will return
MAX_NUMNODES or invalid node.  This will lead to crash in buddy system
allocation.

Fixes: c8721bbbdd36 ("mm: memory-hotplug: enable memory hotplug to handle hugepage")
Signed-off-by: Xishi Qiu <qiuxishi@huawei.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Joonsoo Kim <js1304@gmail.com>
Cc: David Rientjes <rientjes@google.com>
Cc: "Laura Abbott" <lauraa@codeaurora.org>
Cc: Hui Zhu <zhuhui@xiaomi.com>
Cc: Wang Xiaoqiang <wangxq10@lzu.edu.cn>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/page_isolation.c