This is a note to let you know that I've just added the patch titled
rxrpc: Fix the rxrpc_connection attend queue handling
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
rxrpc-fix-the-rxrpc_connection-attend-queue-handling.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 099b182ed845854089b2618c7bbd70be87900196
Author: David Howells <dhowells@xxxxxxxxxx>
Date: Mon Feb 3 11:03:04 2025 +0000
rxrpc: Fix the rxrpc_connection attend queue handling
[ Upstream commit 4241a702e0d0c2ca9364cfac08dbf134264962de ]
The rxrpc_connection attend queue is never used because conn::attend_link
is never initialised and so is always NULL'd out and thus always appears to
be busy. This requires the following fix:
(1) Fix this the attend queue problem by initialising conn::attend_link.
And, consequently, two further fixes for things masked by the above bug:
(2) Fix rxrpc_input_conn_event() to handle being invoked with a NULL
sk_buff pointer - something that can now happen with the above change.
(3) Fix the RXRPC_SKB_MARK_SERVICE_CONN_SECURED message to carry a pointer
to the connection and a ref on it.
Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
cc: Marc Dionne <marc.dionne@xxxxxxxxxxxx>
cc: Jakub Kicinski <kuba@xxxxxxxxxx>
cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
cc: Eric Dumazet <edumazet@xxxxxxxxxx>
cc: Paolo Abeni <pabeni@xxxxxxxxxx>
cc: Simon Horman <horms@xxxxxxxxxx>
cc: linux-afs@xxxxxxxxxxxxxxxxxxx
cc: netdev@xxxxxxxxxxxxxxx
Fixes: f2cce89a074e ("rxrpc: Implement a mechanism to send an event notification to a connection")
Link: https://patch.msgid.link/20250203110307.7265-3-dhowells@xxxxxxxxxx
Signed-off-by: Paolo Abeni <pabeni@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/include/trace/events/rxrpc.h b/include/trace/events/rxrpc.h
index 252bb90aca599..e7c7b63894362 100644
--- a/include/trace/events/rxrpc.h
+++ b/include/trace/events/rxrpc.h
@@ -214,6 +214,7 @@
EM(rxrpc_conn_get_conn_input, "GET inp-conn") \
EM(rxrpc_conn_get_idle, "GET idle ") \
EM(rxrpc_conn_get_poke_abort, "GET pk-abort") \
+ EM(rxrpc_conn_get_poke_secured, "GET secured ") \
EM(rxrpc_conn_get_poke_timer, "GET poke ") \
EM(rxrpc_conn_get_service_conn, "GET svc-conn") \
EM(rxrpc_conn_new_client, "NEW client ") \
diff --git a/net/rxrpc/conn_event.c b/net/rxrpc/conn_event.c
index 2a1396cd892f3..ca5e694ab858b 100644
--- a/net/rxrpc/conn_event.c
+++ b/net/rxrpc/conn_event.c
@@ -266,6 +266,7 @@ static int rxrpc_process_event(struct rxrpc_connection *conn,
* we've already received the packet, put it on the
* front of the queue.
*/
+ sp->conn = rxrpc_get_connection(conn, rxrpc_conn_get_poke_secured);
skb->mark = RXRPC_SKB_MARK_SERVICE_CONN_SECURED;
rxrpc_get_skb(skb, rxrpc_skb_get_conn_secured);
skb_queue_head(&conn->local->rx_queue, skb);
@@ -431,14 +432,16 @@ void rxrpc_input_conn_event(struct rxrpc_connection *conn, struct sk_buff *skb)
if (test_and_clear_bit(RXRPC_CONN_EV_ABORT_CALLS, &conn->events))
rxrpc_abort_calls(conn);
- switch (skb->mark) {
- case RXRPC_SKB_MARK_SERVICE_CONN_SECURED:
- if (conn->state != RXRPC_CONN_SERVICE)
- break;
+ if (skb) {
+ switch (skb->mark) {
+ case RXRPC_SKB_MARK_SERVICE_CONN_SECURED:
+ if (conn->state != RXRPC_CONN_SERVICE)
+ break;
- for (loop = 0; loop < RXRPC_MAXCALLS; loop++)
- rxrpc_call_is_secure(conn->channels[loop].call);
- break;
+ for (loop = 0; loop < RXRPC_MAXCALLS; loop++)
+ rxrpc_call_is_secure(conn->channels[loop].call);
+ break;
+ }
}
/* Process delayed ACKs whose time has come. */
diff --git a/net/rxrpc/conn_object.c b/net/rxrpc/conn_object.c
index 7aa58129ae455..f0c77f437b616 100644
--- a/net/rxrpc/conn_object.c
+++ b/net/rxrpc/conn_object.c
@@ -67,6 +67,7 @@ struct rxrpc_connection *rxrpc_alloc_connection(struct rxrpc_net *rxnet,
INIT_WORK(&conn->destructor, rxrpc_clean_up_connection);
INIT_LIST_HEAD(&conn->proc_link);
INIT_LIST_HEAD(&conn->link);
+ INIT_LIST_HEAD(&conn->attend_link);
mutex_init(&conn->security_lock);
skb_queue_head_init(&conn->rx_queue);
conn->rxnet = rxnet;
