The patch titled
Subject: maple_tree: should get pivots boundary by type
has been added to the -mm mm-hotfixes-unstable branch. Its filename is
maple_tree-should-get-pivots-boundary-by-type.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/maple_tree-should-get-pivots-boundary-by-type.patch
This patch will later appear in the mm-hotfixes-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Wei Yang <richard.weiyang@xxxxxxxxx>
Subject: maple_tree: should get pivots boundary by type
Date: Sat, 12 Nov 2022 23:43:08 +0000
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@xxxxxxxxx
Fixes: 54a611b60590 (Maple Tree: add new data structure)
Signed-off-by: Wei Yang <richard.weiyang@xxxxxxxxx>
Reviewed-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
--- a/lib/maple_tree.c~maple_tree-should-get-pivots-boundary-by-type
+++ a/lib/maple_tree.c
@@ -670,12 +670,13 @@ static inline unsigned long mte_pivot(co
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:
_
Patches currently in -mm which might be from richard.weiyang@xxxxxxxxx are
maple_tree-should-get-pivots-boundary-by-type.patch
