[PATCH bpf] bpf: net: Set sk_bpf_storage back to NULL for cloned sk

[Martin KaFai Lau]

The cloned sk should not carry its parent-listener's sk_bpf_storage.
This patch fixes it by setting it back to NULL.

Fixes: 6ac99e8f23d4 ("bpf: Introduce bpf sk local storage")
Signed-off-by: Martin KaFai Lau <ka...@fb.com>
---
 net/core/sock.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/core/sock.c b/net/core/sock.c
index 2b3701958486..d90fd04622e5 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1850,6 +1850,9 @@ struct sock *sk_clone_lock(const struct sock *sk, const 
gfp_t priority)
                        goto out;
                }
                RCU_INIT_POINTER(newsk->sk_reuseport_cb, NULL);
+#ifdef CONFIG_BPF_SYSCALL
+               RCU_INIT_POINTER(newsk->sk_bpf_storage, NULL);
+#endif
 
                newsk->sk_err      = 0;
                newsk->sk_err_soft = 0;
-- 
2.17.1