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>
---
 net/kcm/kcmsock.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/kcm/kcmsock.c b/net/kcm/kcmsock.c
index 393f01b2a7e6..4580f61426bb 100644
--- a/net/kcm/kcmsock.c
+++ b/net/kcm/kcmsock.c
@@ -1859,6 +1859,8 @@ 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 = {
-- 
2.41.0

Hello:

This patch was applied to netdev/net.git (main)
by Paolo Abeni <pabeni@redhat.com>:

On Sun,  3 Sep 2023 02:07:08 +0900 you wrote:
> 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>
> ---
>  net/kcm/kcmsock.c | 2 ++
>  1 file changed, 2 insertions(+)

Here is the summary with links:
  - [net] kcm: Destroy mutex in kcm_exit_net()
    https://git.kernel.org/netdev/net/c/6ad40b36cd3b

You are awesome, thank you!
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