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net/smc: do not schedule tx_work in SMC_CLOSED state

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The setsockopts options TCP_NODELAY and TCP_CORK may schedule the
tx worker. Make sure the socket is not yet moved into SMC_CLOSED
state (for instance by a shutdown SHUT_RDWR call).

Reported-by: [email protected]
Reported-by: [email protected]
Fixes: 01d2f7e2cd ("net/smc: sockopts TCP_NODELAY and TCP_CORK")
Signed-off-by: Ursula Braun <[email protected]>
Signed-off-by: Karsten Graul <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Ursula Braun 2019-08-02 10:16:38 +02:00 • committed by David S. Miller
commit f9cedf1a9b
1 changed files with 6 additions and 2 deletions
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8
net/smc/af_smc.c
View file

@ -1732,14 +1732,18 @@ static int smc_setsockopt(struct socket *sock, int level, int optname,
}
break;
case TCP_NODELAY:
if (sk->sk_state != SMC_INIT && sk->sk_state != SMC_LISTEN) {
if (sk->sk_state != SMC_INIT &&
sk->sk_state != SMC_LISTEN &&
sk->sk_state != SMC_CLOSED) {
if (val && !smc->use_fallback)
mod_delayed_work(system_wq, &smc->conn.tx_work,
0);
}
break;
case TCP_CORK:
if (sk->sk_state != SMC_INIT && sk->sk_state != SMC_LISTEN) {
if (sk->sk_state != SMC_INIT &&
sk->sk_state != SMC_LISTEN &&
sk->sk_state != SMC_CLOSED) {
if (!val && !smc->use_fallback)
mod_delayed_work(system_wq, &smc->conn.tx_work,
0);