This is a note to let you know that I've just added the patch titled
rxrpc: Fix local destruction being repeated
to the 5.15-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-local-destruction-being-repeated.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit ac32b373b6a6500af601af194738acddfaebbcd4
Author: David Howells <dhowells@xxxxxxxxxx>
Date: Fri May 6 23:55:21 2022 +0100
rxrpc: Fix local destruction being repeated
[ Upstream commit d3d863036d688313f8d566b87acd7d99daf82749 ]
If the local processor work item for the rxrpc local endpoint gets requeued
by an event (such as an incoming packet) between it getting scheduled for
destruction and the UDP socket being closed, the rxrpc_local_destroyer()
function can get run twice. The second time it can hang because it can end
up waiting for cleanup events that will never happen.
Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/net/rxrpc/local_object.c b/net/rxrpc/local_object.c
index ef43fe8bdd2f..1d15940f61d7 100644
--- a/net/rxrpc/local_object.c
+++ b/net/rxrpc/local_object.c
@@ -406,6 +406,9 @@ static void rxrpc_local_processor(struct work_struct *work)
container_of(work, struct rxrpc_local, processor);
bool again;
+ if (local->dead)
+ return;
+
trace_rxrpc_local(local->debug_id, rxrpc_local_processing,
atomic_read(&local->usage), NULL);
