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| author | Liam R. Howlett <Liam.Howlett@Oracle.com> | 2023-04-11 11:10:43 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-04-13 16:55:38 +0200 |
| commit | f41e9e69277b08db8eab5f23715f17eb34418953 (patch) | |
| tree | 79e1ed834eb628de5636365c499b1c0a84207083 /lib | |
| parent | edc5a4e880face9dd479e44c8a87e6d80d620e12 (diff) | |
| download | linux-f41e9e69277b08db8eab5f23715f17eb34418953.tar.gz | |
maple_tree: fix potential rcu issue
commit 65be6f058b0eba98dc6c6f197ea9f62c9b6a519f upstream.
Ensure the node isn't dead after reading the node end.
Link: https://lkml.kernel.org/r/20230120162650.984577-3-Liam.Howlett@oracle.com
Cc: <Stable@vger.kernel.org>
Fixes: 54a611b60590 ("Maple Tree: add new data structure")
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/maple_tree.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/maple_tree.c b/lib/maple_tree.c index bf5eefde92b7fc..f8e1e85dd7a659 100644 --- a/lib/maple_tree.c +++ b/lib/maple_tree.c @@ -4650,13 +4650,13 @@ static inline void *mas_next_nentry(struct ma_state *mas, pivots = ma_pivots(node, type); slots = ma_slots(node, type); mas->index = mas_safe_min(mas, pivots, mas->offset); + count = ma_data_end(node, type, pivots, mas->max); if (ma_dead_node(node)) return NULL; if (mas->index > max) return NULL; - count = ma_data_end(node, type, pivots, mas->max); if (mas->offset > count) return NULL; |