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| author | Wei Yang <richard.weiyang@gmail.com> | 2022-11-12 23:43:08 +0000 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-01-31 16:44:08 -0800 |
| commit | ab6ef70a8b0d314c2160af70b0de984664d675e0 (patch) | |
| tree | 22b7ff508245eee847c17e1b340dc82b6a76d9c2 /lib | |
| parent | 889a904fe34d90c4416dd403f5d3ad859180cf68 (diff) | |
| download | lwn-ab6ef70a8b0d314c2160af70b0de984664d675e0.tar.gz lwn-ab6ef70a8b0d314c2160af70b0de984664d675e0.zip | |
maple_tree: should get pivots boundary by type
We should get pivots boundary by type. Fixes a potential overindexing of
mt_pivots[].
Link: https://lkml.kernel.org/r/20221112234308.23823-1-richard.weiyang@gmail.com
Fixes: 54a611b60590 ("Maple Tree: add new data structure")
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/maple_tree.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/lib/maple_tree.c b/lib/maple_tree.c index b990ccea454e..5a976393c9ae 100644 --- a/lib/maple_tree.c +++ b/lib/maple_tree.c @@ -670,12 +670,13 @@ static inline unsigned long mte_pivot(const struct maple_enode *mn, unsigned char piv) { struct maple_node *node = mte_to_node(mn); + enum maple_type type = mte_node_type(mn); - if (piv >= mt_pivots[piv]) { + if (piv >= mt_pivots[type]) { WARN_ON(1); return 0; } - switch (mte_node_type(mn)) { + switch (type) { case maple_arange_64: return node->ma64.pivot[piv]; case maple_range_64: |