Messages in this thread Patch in this message | | | Subject | [PATCH net 4/6] rxrpc: Don't treat call aborts as conn aborts | From | David Howells <> | Date | Tue, 27 Mar 2018 23:44:35 +0100 |
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If a call-level abort is received for the previous call to complete on a connection channel, then that abort is queued for the connection processor to handle. Unfortunately, the connection processor then assumes without checking that the abort is connection-level (ie. callNumber is 0) and distributes it over all active calls on that connection, thereby incorrectly aborting them.
Fix this by discarding aborts aimed at a completed call.
Further, discard all packets aimed at a call that's complete if there's currently an active call on a channel, since the DATA packets associated with the new call automatically terminate the old call.
Fixes: 18bfeba50dfd ("rxrpc: Perform terminal call ACK/ABORT retransmission from conn processor") Reported-by: Marc Dionne <marc.dionne@auristor.com> Signed-off-by: David Howells <dhowells@redhat.com> ---
net/rxrpc/input.c | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-)
diff --git a/net/rxrpc/input.c b/net/rxrpc/input.c index 31bf954480b6..846ec0938953 100644 --- a/net/rxrpc/input.c +++ b/net/rxrpc/input.c @@ -1242,16 +1242,19 @@ void rxrpc_data_ready(struct sock *udp_sk) goto discard_unlock; if (sp->hdr.callNumber == chan->last_call) { - /* For the previous service call, if completed successfully, we - * discard all further packets. + if (chan->call || + sp->hdr.type == RXRPC_PACKET_TYPE_ABORT) + goto discard_unlock; + + /* For the previous service call, if completed + * successfully, we discard all further packets. */ if (rxrpc_conn_is_service(conn) && - (chan->last_type == RXRPC_PACKET_TYPE_ACK || - sp->hdr.type == RXRPC_PACKET_TYPE_ABORT)) + chan->last_type == RXRPC_PACKET_TYPE_ACK) goto discard_unlock; - /* But otherwise we need to retransmit the final packet from - * data cached in the connection record. + /* But otherwise we need to retransmit the final packet + * from data cached in the connection record. */ rxrpc_post_packet_to_conn(conn, skb); goto out_unlock;
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