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sctp: allow receiving msg when TCP-style sk is in CLOSED state

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Commit 141ddefce7 ("sctp: change sk state to CLOSED instead of
CLOSING in sctp_sock_migrate") changed sk state to CLOSED if the
assoc is closed when sctp_accept clones a new sk.

If there is still data in sk receive queue, users will not be able
to read it any more, as sctp_recvmsg returns directly if sk state
is CLOSED.

This patch is to add CLOSED state check in sctp_recvmsg to allow
reading data from TCP-style sk with CLOSED state as what TCP does.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Xin Long 2016-07-30 14:14:41 +08:00 committed by David S. Miller
parent a0fc6843f9
commit e08786942e
1 changed files with 1 additions and 1 deletions
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2
net/sctp/socket.c
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@ -2079,7 +2079,7 @@ static int sctp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
lock_sock(sk);
if (sctp_style(sk, TCP) && !sctp_sstate(sk, ESTABLISHED) &&
!sctp_sstate(sk, CLOSING)) {
!sctp_sstate(sk, CLOSING) && !sctp_sstate(sk, CLOSED)) {
err = -ENOTCONN;
goto out;
}