kcm: Destroy mutex in kcm_exit_net()

[ Upstream commit 6ad40b36cd3b04209e2d6c89d252c873d8082a59 ]

kcm_exit_net() should call mutex_destroy() on knet->mutex. This is especially
needed if CONFIG_DEBUG_MUTEXES is enabled.

Fixes: ab7ac4eb9832 ("kcm: Kernel Connection Multiplexor module")
Signed-off-by: Shigeru Yoshida <syoshida@redhat.com>
Link: https://lore.kernel.org/r/20230902170708.1727999-1-syoshida@redhat.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/net/kcm/kcmsock.c b/net/kcm/kcmsock.c
index 890a242..6a97662 100644 (file)
--- a/net/kcm/kcmsock.c
+++ b/net/kcm/kcmsock.c
@@ -1981,6 +1981,8 @@ static __net_exit void kcm_exit_net(struct net *net)
         * that all multiplexors and psocks have been destroyed.
         */
        WARN_ON(!list_empty(&knet->mux_list));
+
+       mutex_destroy(&knet->mutex);
 }
 
 static struct pernet_operations kcm_net_ops = {