The patch titled
Subject: maple_tree: return error on mte_pivots() out of range
has been added to the -mm mm-unstable branch. Its filename is
maple_tree-return-error-on-mte_pivots-out-of-range.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/maple_tree-return-error-on-mte_pivots-out-of-range.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: "Liam R. Howlett" <Liam.Howlett@xxxxxxxxxx>
Subject: maple_tree: return error on mte_pivots() out of range
Date: Thu, 18 May 2023 10:55:24 -0400
Rename mte_pivots() to mas_pivots() and pass through the ma_state to set
the error code to -EIO when the offset is out of range for the node type.
Change the WARN_ON() to MAS_WARN_ON() to log the maple state.
Link: https://lkml.kernel.org/r/20230518145544.1722059-16-Liam.Howlett@xxxxxxxxxx
Signed-off-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
Reviewed-by: Peng Zhang <zhangpeng.00@xxxxxxxxxxxxx>
Cc: David Binderman <dcb314@xxxxxxxxxxx>
Cc: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>
Cc: Vernon Yang <vernon2gm@xxxxxxxxx>
Cc: Wei Yang <richard.weiyang@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
lib/maple_tree.c | 25 ++++++++++++++-----------
1 file changed, 14 insertions(+), 11 deletions(-)
--- a/lib/maple_tree.c~maple_tree-return-error-on-mte_pivots-out-of-range
+++ a/lib/maple_tree.c
@@ -663,22 +663,22 @@ static inline unsigned long *ma_gaps(str
}
/*
- * mte_pivot() - Get the pivot at @piv of the maple encoded node.
- * @mn: The maple encoded node.
+ * mas_pivot() - Get the pivot at @piv of the maple encoded node.
+ * @mas: The maple state.
* @piv: The pivot.
*
* Return: the pivot at @piv of @mn.
*/
-static inline unsigned long mte_pivot(const struct maple_enode *mn,
- unsigned char piv)
+static inline unsigned long mas_pivot(struct ma_state *mas, unsigned char piv)
{
- struct maple_node *node = mte_to_node(mn);
- enum maple_type type = mte_node_type(mn);
+ struct maple_node *node = mas_mn(mas);
+ enum maple_type type = mte_node_type(mas->node);
- if (piv >= mt_pivots[type]) {
- WARN_ON(1);
+ if (MAS_WARN_ON(mas, piv >= mt_pivots[type])) {
+ mas_set_err(mas, -EIO);
return 0;
}
+
switch (type) {
case maple_arange_64:
return node->ma64.pivot[piv];
@@ -5394,8 +5394,8 @@ static inline int mas_alloc(struct ma_st
return xa_err(mas->node);
if (!mas->index)
- return mte_pivot(mas->node, 0);
- return mte_pivot(mas->node, 1);
+ return mas_pivot(mas, 0);
+ return mas_pivot(mas, 1);
}
/* Must be walking a tree. */
@@ -5412,7 +5412,10 @@ static inline int mas_alloc(struct ma_st
*/
min = mas->min;
if (mas->offset)
- min = mte_pivot(mas->node, mas->offset - 1) + 1;
+ min = mas_pivot(mas, mas->offset - 1) + 1;
+
+ if (mas_is_err(mas))
+ return xa_err(mas->node);
if (mas->index < min)
mas->index = min;
_
Patches currently in -mm which might be from Liam.Howlett@xxxxxxxxxx are
maple_tree-fix-static-analyser-cppcheck-issue.patch
maple_tree-avoid-unnecessary-ascending.patch
maple_tree-clean-up-mas_dfs_postorder.patch
maple_tree-add-debug-bug_on-and-warn_on-variants.patch
maple_tree-use-mas_bug_on-when-setting-a-leaf-node-as-a-parent.patch
maple_tree-use-mas_bug_on-in-mas_set_height.patch
maple_tree-use-mas_bug_on-from-mas_topiary_range.patch
maple_tree-use-mas_wr_bug_on-in-mas_store_prealloc.patch
maple_tree-use-mas_bug_on-prior-to-calling-mas_meta_gap.patch
maple_tree-return-error-on-mte_pivots-out-of-range.patch
maple_tree-make-test-code-work-without-debug-enabled.patch
mm-update-validate_mm-to-use-vma-iterator.patch
mm-update-vma_iter_store-to-use-mas_warn_on.patch
maple_tree-add-__init-and-__exit-to-test-module.patch
maple_tree-remove-unnecessary-check-from-mas_destroy.patch
maple_tree-mas_start-reset-depth-on-dead-node.patch
mm-mmap-change-do_vmi_align_munmap-for-maple-tree-iterator-changes.patch
maple_tree-try-harder-to-keep-active-node-after-mas_next.patch
maple_tree-try-harder-to-keep-active-node-with-mas_prev.patch
maple_tree-revise-limit-checks-in-mas_empty_area_rev.patch
maple_tree-fix-testing-mas_empty_area.patch
maple_tree-introduce-mas_next_slot-interface.patch
maple_tree-add-mas_next_range-and-mas_find_range-interfaces.patch
maple_tree-relocate-mas_rewalk-and-mas_rewalk_if_dead.patch
maple_tree-introduce-mas_prev_slot-interface.patch
maple_tree-add-mas_prev_range-and-mas_find_range_rev-interface.patch
maple_tree-clear-up-index-and-last-setting-in-single-entry-tree.patch
maple_tree-update-testing-code-for-mas_nextprevwalk.patch
mm-add-vma_iter_nextprev_range-to-vma-iterator.patch
mm-avoid-rewalk-in-mmap_region.patch
