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| author | Wen Yang | 2017-09-07 01:24:06 +0200 |
|---|---|---|
| committer | Linus Torvalds | 2017-09-07 02:27:29 +0200 |
| commit | 88d6ac40c1c6b2334046d3f89f1911a3c8febd4c (patch) | |
| tree | 15b853c5e0a033d0b69ccfb28b3fbdb30baad430 /mm/vmalloc.c | |
| parent | mm, hugetlb: do not allocate non-migrateable gigantic pages from movable zones (diff) | |
| download | kernel-qcow2-linux-88d6ac40c1c6b2334046d3f89f1911a3c8febd4c.tar.gz kernel-qcow2-linux-88d6ac40c1c6b2334046d3f89f1911a3c8febd4c.tar.xz kernel-qcow2-linux-88d6ac40c1c6b2334046d3f89f1911a3c8febd4c.zip | |
mm/vmstat: fix divide error at __fragmentation_index
When order is -1 or too big, *1UL << order* will be 0, which will cause
a divide error. Although it seems that all callers of
__fragmentation_index() will only do so with a valid order, the patch
can make it more robust.
Should prevent reoccurrences of
https://bugzilla.kernel.org/show_bug.cgi?id=196555
Link: http://lkml.kernel.org/r/1501751520-2598-1-git-send-email-wen.yang99@zte.com.cn
Signed-off-by: Wen Yang <wen.yang99@zte.com.cn>
Reviewed-by: Jiang Biao <jiang.biao2@zte.com.cn>
Suggested-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/vmalloc.c')
0 files changed, 0 insertions, 0 deletions