3 commits

Author	SHA1	Message	Date
Cong Wang	0b84644598	unix_bpf: Fix a potential deadlock in unix_dgram_bpf_recvmsg() ... As Eric noticed, __unix_dgram_recvmsg() may acquire u->iolock too, so we have to release it before calling this function. Fixes: 9825d866ce ("af_unix: Implement unix_dgram_bpf_recvmsg()") Reported-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Cong Wang <cong.wang@bytedance.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Jakub Sitnicki <jakub@cloudflare.com> Acked-by: John Fastabend <john.fastabend@gmail.com>	2021-07-30 12:40:55 -07:00
Cong Wang	9825d866ce	af_unix: Implement unix_dgram_bpf_recvmsg() ... We have to implement unix_dgram_bpf_recvmsg() to replace the original ->recvmsg() to retrieve skmsg from ingress_msg. AF_UNIX is again special here because the lack of sk_prot->recvmsg(). I simply add a special case inside unix_dgram_recvmsg() to call sk->sk_prot->recvmsg() directly. Signed-off-by: Cong Wang <cong.wang@bytedance.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20210704190252.11866-8-xiyou.wangcong@gmail.com	2021-07-15 18:17:50 -07:00
Cong Wang	c63829182c	af_unix: Implement ->psock_update_sk_prot() ... Now we can implement unix_bpf_update_proto() to update sk_prot, especially prot->close(). Signed-off-by: Cong Wang <cong.wang@bytedance.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20210704190252.11866-7-xiyou.wangcong@gmail.com	2021-07-15 18:17:50 -07:00