linux-kernel - [PATCH rdma-next] IB/cm: Release previously acquired reference counter in the cm_id

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Date:   Wed, 19 Jan 2022 10:37:55 +0200
From:   Leon Romanovsky <leon@...nel.org>
To:     Jason Gunthorpe <jgg@...dia.com>
Cc:     Mark Zhang <markzhang@...dia.com>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        linux-kernel@...r.kernel.org, linux-rdma@...r.kernel.org
Subject: [PATCH rdma-next] IB/cm: Release previously acquired reference counter in the cm_id_priv

From: Mark Zhang <markzhang@...dia.com>

In failure flow, the reference counter acquired was not released,
and the following error was reported:

  drivers/infiniband/core/cm.c:3373 cm_lap_handler() warn: inconsistent
			refcounting 'cm_id_priv->refcount.refs.counter':

Fixes: 7345201c3963 ("IB/cm: Improve the calling of cm_init_av_for_lap and cm_init_av_by_path")
Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Mark Zhang <markzhang@...dia.com>
Signed-off-by: Leon Romanovsky <leonro@...dia.com>
---
 drivers/infiniband/core/cm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/infiniband/core/cm.c b/drivers/infiniband/core/cm.c
index c903b74f46a4..35f0d5e7533d 100644
--- a/drivers/infiniband/core/cm.c
+++ b/drivers/infiniband/core/cm.c
@@ -3322,7 +3322,7 @@ static int cm_lap_handler(struct cm_work *work)
 	ret = cm_init_av_by_path(param->alternate_path, NULL, &alt_av);
 	if (ret) {
 		rdma_destroy_ah_attr(&ah_attr);
-		return -EINVAL;
+		goto deref;
 	}
 
 	spin_lock_irq(&cm_id_priv->lock);
-- 
2.34.1