RxRPC: Don't attempt to reuse aborted connections

Connections that have seen a connection-level abort should not be reused
as the far end will just abort them again; instead a new connection
should be made.

Connection-level aborts occur due to such things as authentication
failures.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 16 insertions, 1 deletions

diff --git a/net/rxrpc/ar-connection.c b/net/rxrpc/ar-connection.c
index 67e38a056240..9f1ce841a0bb 100644
--- a/net/rxrpc/ar-connection.c
+++ b/net/rxrpc/ar-connection.c
@@ -444,6 +444,11 @@ int rxrpc_connect_call(struct rxrpc_sock *rx,
                         conn = list_entry(bundle->avail_conns.next,
                                           struct rxrpc_connection,
                                           bundle_link);
+                        if (conn->state >= RXRPC_CONN_REMOTELY_ABORTED) {
+                                list_del_init(&conn->bundle_link);
+                                bundle->num_conns--;
+                                continue;
+                        }
                         if (--conn->avail_calls == 0)
                                 list_move(&conn->bundle_link,
                                           &bundle->busy_conns);
@@ -461,6 +466,11 @@ int rxrpc_connect_call(struct rxrpc_sock *rx,
                         conn = list_entry(bundle->unused_conns.next,
                                           struct rxrpc_connection,
                                           bundle_link);
+                        if (conn->state >= RXRPC_CONN_REMOTELY_ABORTED) {
+                                list_del_init(&conn->bundle_link);
+                                bundle->num_conns--;
+                                continue;
+                        }
                         ASSERTCMP(conn->avail_calls, ==, RXRPC_MAXCALLS);
                         conn->avail_calls = RXRPC_MAXCALLS - 1;
                         ASSERT(conn->channels[0] == NULL &&
diff --git a/net/rxrpc/ar-connevent.c b/net/rxrpc/ar-connevent.c
index dc5cb1e19509..0505cdc4d6d4 100644
--- a/net/rxrpc/ar-connevent.c
+++ b/net/rxrpc/ar-connevent.c
@@ -150,11 +150,15 @@ static int rxrpc_process_event(struct rxrpc_connection *conn,
         u32 serial;
         int loop, ret;
 
-        if (conn->state >= RXRPC_CONN_REMOTELY_ABORTED)
+        if (conn->state >= RXRPC_CONN_REMOTELY_ABORTED) {
+                kleave(" = -ECONNABORTED [%u]", conn->state);
                 return -ECONNABORTED;
+        }
 
         serial = ntohl(sp->hdr.serial);
 
+        _enter("{%d},{%u,%%%u},", conn->debug_id, sp->hdr.type, serial);
+
         switch (sp->hdr.type) {
         case RXRPC_PACKET_TYPE_ABORT:
                 if (skb_copy_bits(skb, 0, &tmp, sizeof(tmp)) < 0)
@@ -199,6 +203,7 @@ static int rxrpc_process_event(struct rxrpc_connection *conn,
                 return 0;
 
         default:
+                _leave(" = -EPROTO [%u]", sp->hdr.type);
                 return -EPROTO;
         }
 }