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| author | Wei Yang <richard.weiyang@gmail.com> | 2022-11-12 23:43:08 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-02-09 11:28:08 +0100 |
| commit | e0514483fa88f4e4960a080ad0613c1503386f34 (patch) | |
| tree | ae707b42c083967a4c8fa227cff8b4f1ad684dd1 /lib/maple_tree.c | |
| parent | 29e774dcb27116c06b9c57b1f1f14a1623738989 (diff) | |
| download | linux-e0514483fa88f4e4960a080ad0613c1503386f34.tar.gz | |
maple_tree: should get pivots boundary by type
[ Upstream commit ab6ef70a8b0d314c2160af70b0de984664d675e0 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'lib/maple_tree.c')
| -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 fe21bf276d91..5bfaae60ed8b 100644 --- a/lib/maple_tree.c +++ b/lib/maple_tree.c @@ -665,12 +665,13 @@ 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: |