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authorDavid Howells <dhowells@redhat.com>2019-08-29 14:12:11 +0100
committerDavid S. Miller <davem@davemloft.net>2019-08-30 15:06:52 -0700
commitd12040b6933f684a26773afad46dbba9778608d7 (patch)
treea6a3bb4f3075037b6b557d681bcabcfc62975fff /net/rxrpc/local_object.c
parenta285c1fa39ccc6f04b1af025ec00b1aae52e6814 (diff)
downloadlinux-stericsson-d12040b6933f684a26773afad46dbba9778608d7.tar.gz
rxrpc: Fix lack of conn cleanup when local endpoint is cleaned up [ver #2]
When a local endpoint is ceases to be in use, such as when the kafs module is unloaded, the kernel will emit an assertion failure if there are any outstanding client connections: rxrpc: Assertion failed ------------[ cut here ]------------ kernel BUG at net/rxrpc/local_object.c:433! and even beyond that, will evince other oopses if there are service connections still present. Fix this by: (1) Removing the triggering of connection reaping when an rxrpc socket is released. These don't actually clean up the connections anyway - and further, the local endpoint may still be in use through another socket. (2) Mark the local endpoint as dead when we start the process of tearing it down. (3) When destroying a local endpoint, strip all of its client connections from the idle list and discard the ref on each that the list was holding. (4) When destroying a local endpoint, call the service connection reaper directly (rather than through a workqueue) to immediately kill off all outstanding service connections. (5) Make the service connection reaper reap connections for which the local endpoint is marked dead. Only after destroying the connections can we close the socket lest we get an oops in a workqueue that's looking at a connection or a peer. Fixes: 3d18cbb7fd0c ("rxrpc: Fix conn expiry timers") Signed-off-by: David Howells <dhowells@redhat.com> Tested-by: Marc Dionne <marc.dionne@auristor.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/rxrpc/local_object.c')
-rw-r--r--net/rxrpc/local_object.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/net/rxrpc/local_object.c b/net/rxrpc/local_object.c
index 72a6e12a9304..36587260cabd 100644
--- a/net/rxrpc/local_object.c
+++ b/net/rxrpc/local_object.c
@@ -426,11 +426,14 @@ static void rxrpc_local_destroyer(struct rxrpc_local *local)
_enter("%d", local->debug_id);
+ local->dead = true;
+
mutex_lock(&rxnet->local_mutex);
list_del_init(&local->link);
mutex_unlock(&rxnet->local_mutex);
- ASSERT(RB_EMPTY_ROOT(&local->client_conns));
+ rxrpc_clean_up_local_conns(local);
+ rxrpc_service_connection_reaper(&rxnet->service_conn_reaper);
ASSERT(!local->service);
if (socket) {