ARRAY_OF_MAPS and HASH_OF_MAPS map types have special logic to save
a few extra fields required for correct operations of ARRAY maps, when
they are used as inner maps. PERCPU_ARRAY maps have similar
requirements as they now support generating inline element lookup
logic. So make sure that both classes of maps are handled correctly.
Reported-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Fixes: db69718b8efa ("bpf: inline bpf_map_lookup_elem() for PERCPU_ARRAY maps")
Signed-off-by: Andrii Nakryiko <andrii@xxxxxxxxxx>
---
kernel/bpf/map_in_map.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/kernel/bpf/map_in_map.c b/kernel/bpf/map_in_map.c
index 8ef269e66ba5..b4f18c85d7bc 100644
--- a/kernel/bpf/map_in_map.c
+++ b/kernel/bpf/map_in_map.c
@@ -32,7 +32,7 @@ struct bpf_map *bpf_map_meta_alloc(int inner_map_ufd)
inner_map_meta_size = sizeof(*inner_map_meta);
/* In some cases verifier needs to access beyond just base map. */
- if (inner_map->ops == &array_map_ops)
+ if (inner_map->ops == &array_map_ops || inner_map->ops == &percpu_array_map_ops)
inner_map_meta_size = sizeof(struct bpf_array);
inner_map_meta = kzalloc(inner_map_meta_size, GFP_USER);
@@ -68,7 +68,7 @@ struct bpf_map *bpf_map_meta_alloc(int inner_map_ufd)
/* Misc members not needed in bpf_map_meta_equal() check. */
inner_map_meta->ops = inner_map->ops;
- if (inner_map->ops == &array_map_ops) {
+ if (inner_map->ops == &array_map_ops || inner_map->ops == &percpu_array_map_ops) {
struct bpf_array *inner_array_meta =
container_of(inner_map_meta, struct bpf_array, map);
struct bpf_array *inner_array = container_of(inner_map, struct bpf_array, map);
--
2.43.0
