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| author | Liam R. Howlett <Liam.Howlett@Oracle.com> | 2023-01-20 11:26:03 -0500 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-02-09 16:51:30 -0800 |
| commit | 65be6f058b0eba98dc6c6f197ea9f62c9b6a519f (patch) | |
| tree | f020b5d0d6f69d63c223e9fe047cbaa6179736c0 /lib/maple_tree.c | |
| parent | e7f43ca99fc8bff2333547bb08dae20a35a23450 (diff) | |
| download | lwn-65be6f058b0eba98dc6c6f197ea9f62c9b6a519f.tar.gz lwn-65be6f058b0eba98dc6c6f197ea9f62c9b6a519f.zip | |
maple_tree: fix potential rcu issue
Ensure the node isn't dead after reading the node end.
Link: https://lkml.kernel.org/r/20230120162650.984577-3-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'lib/maple_tree.c')
| -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 1c5d3b640a24..7e3cf5b7e68b 100644 --- a/lib/maple_tree.c +++ b/lib/maple_tree.c @@ -4655,13 +4655,13 @@ 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; |