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nvmet-tcp: fix callback lock for TLS handshake

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When restoring the default socket callbacks during a TLS handshake, we
need to acquire a write lock on sk_callback_lock.  Previously, a read
lock was used, which is insufficient for modifying sk_user_data and
sk_data_ready.

Fixes: 675b453e02 ("nvmet-tcp: enable TLS handshake upcall")
Signed-off-by: Maurizio Lombardi <mlombard@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Maurizio Lombardi 2025-07-04 16:44:54 +02:00 committed by Christoph Hellwig
parent 71257925e8
commit 0523c6cc87
1 changed files with 2 additions and 2 deletions
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4
drivers/nvme/target/tcp.c
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@ -1928,10 +1928,10 @@ static void nvmet_tcp_alloc_queue(struct nvmet_tcp_port *port,
struct sock *sk = queue->sock->sk;
/* Restore the default callbacks before starting upcall */
read_lock_bh(&sk->sk_callback_lock);
write_lock_bh(&sk->sk_callback_lock);
sk->sk_user_data = NULL;
sk->sk_data_ready = port->data_ready;
read_unlock_bh(&sk->sk_callback_lock);
write_unlock_bh(&sk->sk_callback_lock);
if (!nvmet_tcp_try_peek_pdu(queue)) {
if (!nvmet_tcp_tls_handshake(queue))
return;