[PATCH 5.4 269/367] kcm: Destroy mutex in kcm_exit_net()

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5.4-stable review patch.  If anyone has any objections, please let me know.


From: Shigeru Yoshida <syoshida@xxxxxxxxxx>

[ 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@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20230902170708.1727999-1-syoshida@xxxxxxxxxx
Signed-off-by: Paolo Abeni <pabeni@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
 net/kcm/kcmsock.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/kcm/kcmsock.c b/net/kcm/kcmsock.c
index 1975403ce8bee..50bcfc71389ab 100644
--- a/net/kcm/kcmsock.c
+++ b/net/kcm/kcmsock.c
@@ -1984,6 +1984,8 @@ static __net_exit void kcm_exit_net(struct net *net)
 	 * that all multiplexors and psocks have been destroyed.
+	mutex_destroy(&knet->mutex);
 static struct pernet_operations kcm_net_ops = {

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