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[fips-legacy-8] net/ulp: prevent ULP without clone op from entering the LISTEN status #393

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Merged
merged 2 commits into from
Jul 3, 2025
Merged

[fips-legacy-8] net/ulp: prevent ULP without clone op from entering the LISTEN status #393

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f16d9e8
net/ulp: prevent ULP without clone op from entering the LISTEN status
bmastbergen Jul 1, 2025
25bb22c
net/ulp: use consistent error code when blocking ULP
bmastbergen Jul 1, 2025
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15 changes: 15 additions & 0 deletions net/ipv4/inet_connection_sock.c
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Original file line number Diff line number Diff line change
Expand Up @@ -900,12 +900,27 @@ void inet_csk_prepare_forced_close(struct sock *sk)
}
EXPORT_SYMBOL(inet_csk_prepare_forced_close);

static int inet_ulp_can_listen(const struct sock *sk)
{
const struct inet_connection_sock *icsk = inet_csk(sk);

if (icsk->icsk_ulp_ops && !icsk->icsk_ulp_ops->clone)
return -EINVAL;

return 0;
}

int inet_csk_listen_start(struct sock *sk, int backlog)
{
struct inet_connection_sock *icsk = inet_csk(sk);
struct inet_sock *inet = inet_sk(sk);
int err = -EADDRINUSE;

err = inet_ulp_can_listen(sk);
if (unlikely(err))
return err;

err = -EADDRINUSE;
reqsk_queue_alloc(&icsk->icsk_accept_queue);

sk->sk_ack_backlog = 0;
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4 changes: 4 additions & 0 deletions net/ipv4/tcp_ulp.c
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Original file line number Diff line number Diff line change
Expand Up @@ -131,6 +131,10 @@ static int __tcp_set_ulp(struct sock *sk, const struct tcp_ulp_ops *ulp_ops)
if (icsk->icsk_ulp_ops)
goto out_err;

err = -ENOTCONN;
if (!ulp_ops->clone && sk->sk_state == TCP_LISTEN)
goto out_err;

err = ulp_ops->init(sk);
if (err)
goto out_err;
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