| Message ID | 20210731195038.8084-1-xiyou.wangcong@gmail.com |
|---|---|
| State | New |
| Headers | show |
| Series | [bpf-next] unix_bpf: check socket type in unix_bpf_update_proto() | expand |
On Sat, Jul 31, 2021 at 09:50 PM CEST, Cong Wang wrote: > From: Cong Wang <cong.wang@bytedance.com> > > As of now, only AF_UNIX datagram socket supports sockmap. > But unix_proto is shared for all kinds of AF_UNIX sockets, > so we have to check the socket type in > unix_bpf_update_proto() to explicitly reject other types, > otherwise they could be added into sockmap too. > > Fixes: c63829182c37 ("af_unix: Implement ->psock_update_sk_prot()") > Reported-by: Jakub Sitnicki <jakub@cloudflare.com> > Cc: John Fastabend <john.fastabend@gmail.com> > Cc: Daniel Borkmann <daniel@iogearbox.net> > Cc: Lorenz Bauer <lmb@cloudflare.com> > Signed-off-by: Cong Wang <cong.wang@bytedance.com> > --- > net/unix/unix_bpf.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/net/unix/unix_bpf.c b/net/unix/unix_bpf.c > index 177e883f451e..20f53575b5c9 100644 > --- a/net/unix/unix_bpf.c > +++ b/net/unix/unix_bpf.c > @@ -105,6 +105,9 @@ static void unix_bpf_check_needs_rebuild(struct proto *ops) > > int unix_bpf_update_proto(struct sock *sk, struct sk_psock *psock, bool restore) > { > + if (sk->sk_type != SOCK_DGRAM) > + return -EOPNOTSUPP; > + > if (restore) { > sk->sk_write_space = psock->saved_write_space; > WRITE_ONCE(sk->sk_prot, psock->sk_proto); Acked-by: Jakub Sitnicki <jakub@cloudflare.com>
Hello: This patch was applied to bpf/bpf-next.git (refs/heads/master): On Sat, 31 Jul 2021 12:50:38 -0700 you wrote: > From: Cong Wang <cong.wang@bytedance.com> > > As of now, only AF_UNIX datagram socket supports sockmap. > But unix_proto is shared for all kinds of AF_UNIX sockets, > so we have to check the socket type in > unix_bpf_update_proto() to explicitly reject other types, > otherwise they could be added into sockmap too. > > [...] Here is the summary with links: - [bpf-next] unix_bpf: check socket type in unix_bpf_update_proto() https://git.kernel.org/bpf/bpf-next/c/83f31535565c You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html
diff --git a/net/unix/unix_bpf.c b/net/unix/unix_bpf.c index 177e883f451e..20f53575b5c9 100644 --- a/net/unix/unix_bpf.c +++ b/net/unix/unix_bpf.c @@ -105,6 +105,9 @@ static void unix_bpf_check_needs_rebuild(struct proto *ops) int unix_bpf_update_proto(struct sock *sk, struct sk_psock *psock, bool restore) { + if (sk->sk_type != SOCK_DGRAM) + return -EOPNOTSUPP; + if (restore) { sk->sk_write_space = psock->saved_write_space; WRITE_ONCE(sk->sk_prot, psock->sk_proto);