The patch titled
Subject: maple_tree: fix mas_alloc_nodes()
has been added to the -mm mm-unstable branch. Its filename is
maple-tree-add-new-data-structure-fix-3.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/maple-tree-add-new-data-structure-fix-3.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days
------------------------------------------------------
From: Liam Howlett <liam.howlett@xxxxxxxxxx>
Subject: maple_tree: fix mas_alloc_nodes()
Date: Tue, 2 Aug 2022 19:36:24 +0000
Use MAPLE_ALLOC_SLOTS, which differs on 32bit. This was causing an
out of bounds issue on 32bit bulk allocations
Link: https://lkml.kernel.org/r/20220802193612.2886170-1-Liam.Howlett@xxxxxxxxxx
Fixes: 06b152b7980a (Maple Tree: add new data structure)
Signed-off-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
lib/maple_tree.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/lib/maple_tree.c~maple-tree-add-new-data-structure-fix-3
+++ a/lib/maple_tree.c
@@ -1242,7 +1242,7 @@ static inline void mas_alloc_nodes(struc
node = mas->alloc;
while (requested) {
- max_req = MAPLE_NODE_SLOTS - 1;
+ max_req = MAPLE_ALLOC_SLOTS;
if (node->slot[0]) {
unsigned int offset = node->node_count + 1;
_
Patches currently in -mm which might be from liam.howlett@xxxxxxxxxx are
maple-tree-add-new-data-structure-fix-2.patch
maple-tree-add-new-data-structure-fix.patch
maple-tree-add-new-data-structure-fix-3.patch
kernel-fork-use-maple-tree-for-dup_mmap-during-forking-fix.patch
maple_tree-do-not-inline-write-slow-path.patch
