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rxrpc: Fix response to PING RESPONSE ACKs to a dead call

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[ Upstream commit 6f769f22822aa4124b556339781b04d810f0e038 ]

Stop rxrpc from sending a DUP ACK in response to a PING RESPONSE ACK on a
dead call.  We may have initiated the ping but the call may have beaten the
response to completion.

Fixes: 18bfeba50dfd ("rxrpc: Perform terminal call ACK/ABORT retransmission from conn processor")
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: "David S. Miller" <davem@davemloft.net>
cc: Eric Dumazet <edumazet@google.com>
cc: Jakub Kicinski <kuba@kernel.org>
cc: Paolo Abeni <pabeni@redhat.com>
cc: linux-afs@lists.infradead.org
cc: netdev@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
David Howells 2024-02-02 15:19:15 +00:00 • committed by Ksawlii
parent 008552f983
commit 8859f27762
1 changed files with 8 additions and 0 deletions
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8
net/rxrpc/conn_event.c
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@ -41,6 +41,14 @@ static void rxrpc_conn_retransmit_call(struct rxrpc_connection *conn,
_enter("%d", conn->debug_id);
if (sp && sp->hdr.type == RXRPC_PACKET_TYPE_ACK) {
if (skb_copy_bits(skb, sizeof(struct rxrpc_wire_header),
&pkt.ack, sizeof(pkt.ack)) < 0)
return;
if (pkt.ack.reason == RXRPC_ACK_PING_RESPONSE)
return;
}
chan = &conn->channels[channel];
/* If the last call got moved on whilst we were waiting to run, just