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| author | Paolo Abeni <pabeni@redhat.com> | 2021-02-11 15:30:38 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-02-11 18:30:54 -0800 |
| commit | dd913410b0a442a53d41a9817ed2208850858e99 (patch) | |
| tree | d676bc5cce26c517b6da357e925d753a3f2a062e | |
| parent | 15cc10453398c22f78f6c2b897119ecce5e5dd89 (diff) | |
| download | linux-dd913410b0a442a53d41a9817ed2208850858e99.tar.bz2 | |
mptcp: fix poll after shutdown
The current mptcp_poll() implementation gives unexpected
results after shutdown(SEND_SHUTDOWN) and when the msk
status is TCP_CLOSE.
Set the correct mask.
Fixes: 8edf08649eed ("mptcp: rework poll+nospace handling")
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/mptcp/protocol.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c index 9eecd1383d24..42ca49954bdd 100644 --- a/net/mptcp/protocol.c +++ b/net/mptcp/protocol.c @@ -3321,7 +3321,7 @@ static __poll_t mptcp_check_writeable(struct mptcp_sock *msk) struct sock *sk = (struct sock *)msk; if (unlikely(sk->sk_shutdown & SEND_SHUTDOWN)) - return 0; + return EPOLLOUT | EPOLLWRNORM; if (sk_stream_is_writeable(sk)) return EPOLLOUT | EPOLLWRNORM; @@ -3354,6 +3354,8 @@ static __poll_t mptcp_poll(struct file *file, struct socket *sock, mask |= mptcp_check_readable(msk); mask |= mptcp_check_writeable(msk); } + if (sk->sk_shutdown == SHUTDOWN_MASK || state == TCP_CLOSE) + mask |= EPOLLHUP; if (sk->sk_shutdown & RCV_SHUTDOWN) mask |= EPOLLIN | EPOLLRDNORM | EPOLLRDHUP; |