From: Hou Tao houtao1@huawei.com
commit 52bd05eb7c88e1ad8541a48873188ccebca9da26 upstream.
The value of sock local storage map is writable in map iterator, so check max_rdwr_access instead of max_rdonly_access.
Fixes: 5ce6e77c7edf ("bpf: Implement bpf iterator for sock local storage map") Signed-off-by: Hou Tao houtao1@huawei.com Acked-by: Yonghong Song yhs@fb.com Acked-by: Martin KaFai Lau kafai@fb.com Link: https://lore.kernel.org/r/20220810080538.1845898-6-houtao@huaweicloud.com Signed-off-by: Alexei Starovoitov ast@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/core/bpf_sk_storage.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/net/core/bpf_sk_storage.c +++ b/net/core/bpf_sk_storage.c @@ -894,7 +894,7 @@ static int bpf_iter_attach_map(struct bp if (map->map_type != BPF_MAP_TYPE_SK_STORAGE) goto put_map;
- if (prog->aux->max_rdonly_access > map->value_size) { + if (prog->aux->max_rdwr_access > map->value_size) { err = -EACCES; goto put_map; }