diff mbox series

maple_tree: Fix mas_alloc_nodes()

Message ID 20220802193612.2886170-1-Liam.Howlett@oracle.com (mailing list archive)
State New
Headers show
Series maple_tree: Fix mas_alloc_nodes() | expand

Commit Message

Liam R. Howlett Aug. 2, 2022, 7:36 p.m. UTC 
Use MAPLE_ALLOC_SLOTS, which differs on 32bit.  This was causing an
out of bounds issue on 32bit bulk allocations

Fixes: 06b152b7980a (Maple Tree: add new data structure)
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
---
 lib/maple_tree.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/lib/maple_tree.c b/lib/maple_tree.c
index 4e41f3394114..032e7bb0d44f 100644
--- a/lib/maple_tree.c
+++ b/lib/maple_tree.c
@@ -1242,7 +1242,7 @@  static inline void mas_alloc_nodes(struct ma_state *mas, gfp_t gfp)
 
 	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;