diff options
| author | Lorenz Bauer <lmb@cloudflare.com> | 2020-03-09 11:12:32 +0000 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2020-03-09 22:34:58 +0100 |
| commit | 7b70973d7edb2f005511102d5a2e0116464a46a1 (patch) | |
| tree | ef6bdfbf69c5c495f1f1878eaf5000da0c0afa45 /net/core/sock_map.c | |
| parent | 3e7c67d90e3ed2f34fce42699f11b150dd1d3999 (diff) | |
bpf: sockmap: Only check ULP for TCP sockets
The sock map code checks that a socket does not have an active upper
layer protocol before inserting it into the map. This requires casting
via inet_csk, which isn't valid for UDP sockets.
Guard checks for ULP by checking inet_sk(sk)->is_icsk first.
Signed-off-by: Lorenz Bauer <lmb@cloudflare.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Jakub Sitnicki <jakub@cloudflare.com>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/bpf/20200309111243.6982-2-lmb@cloudflare.com
Diffstat (limited to 'net/core/sock_map.c')
| -rw-r--r-- | net/core/sock_map.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/net/core/sock_map.c b/net/core/sock_map.c index 2e0f465295c3..cb8f740f7949 100644 --- a/net/core/sock_map.c +++ b/net/core/sock_map.c @@ -384,7 +384,6 @@ static int sock_map_update_common(struct bpf_map *map, u32 idx, struct sock *sk, u64 flags) { struct bpf_stab *stab = container_of(map, struct bpf_stab, map); - struct inet_connection_sock *icsk = inet_csk(sk); struct sk_psock_link *link; struct sk_psock *psock; struct sock *osk; @@ -395,7 +394,7 @@ static int sock_map_update_common(struct bpf_map *map, u32 idx, return -EINVAL; if (unlikely(idx >= map->max_entries)) return -E2BIG; - if (unlikely(rcu_access_pointer(icsk->icsk_ulp_data))) + if (inet_csk_has_ulp(sk)) return -EINVAL; link = sk_psock_init_link(); @@ -738,7 +737,6 @@ static int sock_hash_update_common(struct bpf_map *map, void *key, struct sock *sk, u64 flags) { struct bpf_htab *htab = container_of(map, struct bpf_htab, map); - struct inet_connection_sock *icsk = inet_csk(sk); u32 key_size = map->key_size, hash; struct bpf_htab_elem *elem, *elem_new; struct bpf_htab_bucket *bucket; @@ -749,7 +747,7 @@ static int sock_hash_update_common(struct bpf_map *map, void *key, WARN_ON_ONCE(!rcu_read_lock_held()); if (unlikely(flags > BPF_EXIST)) return -EINVAL; - if (unlikely(icsk->icsk_ulp_data)) + if (inet_csk_has_ulp(sk)) return -EINVAL; link = sk_psock_init_link(); |