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authorLorenz Bauer <lmb@cloudflare.com>2020-06-11 18:25:20 +0100
committerAlexei Starovoitov <ast@kernel.org>2020-06-12 15:13:43 -0700
commitf6fede8569689dd31e7b0ed15024b25e5ce2e2e5 (patch)
tree05dd70a403a2cb4187a111008b6050126fda0acb
parent2c7269b231194aae23fb90ab65842573a91acbc9 (diff)
downloadlinux-f6fede8569689dd31e7b0ed15024b25e5ce2e2e5.tar.gz
bpf: sockmap: Don't attach programs to UDP sockets
The stream parser infrastructure isn't set up to deal with UDP sockets, so we mustn't try to attach programs to them. I remember making this change at some point, but I must have lost it while rebasing or something similar. Fixes: 7b98cd42b049 ("bpf: sockmap: Add UDP support") Signed-off-by: Lorenz Bauer <lmb@cloudflare.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Jakub Sitnicki <jakub@cloudflare.com> Link: https://lore.kernel.org/bpf/20200611172520.327602-1-lmb@cloudflare.com
-rw-r--r--net/core/sock_map.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/net/core/sock_map.c b/net/core/sock_map.c
index 17a40a9..a2dc64d 100644
--- a/net/core/sock_map.c
+++ b/net/core/sock_map.c
@@ -424,10 +424,7 @@ static int sock_map_get_next_key(struct bpf_map *map, void *key, void *next)
return 0;
}
-static bool sock_map_redirect_allowed(const struct sock *sk)
-{
- return sk->sk_state != TCP_LISTEN;
-}
+static bool sock_map_redirect_allowed(const struct sock *sk);
static int sock_map_update_common(struct bpf_map *map, u32 idx,
struct sock *sk, u64 flags)
@@ -508,6 +505,11 @@ static bool sk_is_udp(const struct sock *sk)
sk->sk_protocol == IPPROTO_UDP;
}
+static bool sock_map_redirect_allowed(const struct sock *sk)
+{
+ return sk_is_tcp(sk) && sk->sk_state != TCP_LISTEN;
+}
+
static bool sock_map_sk_is_suitable(const struct sock *sk)
{
return sk_is_tcp(sk) || sk_is_udp(sk);