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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Miaoqian Lin <linmq006@gmail.com>,
        Jason Gunthorpe <jgg@nvidia.com>
Subject: [PATCH 5.10 22/84] RDMA/cm: Fix memory leak in ib_cm_insert_listen
Date:   Tue,  5 Jul 2022 13:57:45 +0200
Message-Id: <20220705115615.974240906@linuxfoundation.org>
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From: Miaoqian Lin <linmq006@gmail.com>

commit 2990f223ffa7bb25422956b9f79f9176a5b38346 upstream.

cm_alloc_id_priv() allocates resource for the cm_id_priv. When
cm_init_listen() fails it doesn't free it, leading to memory leak.

Add the missing error unwind.

Fixes: 98f67156a80f ("RDMA/cm: Simplify establishing a listen cm_id")
Link: https://lore.kernel.org/r/20220621052546.4821-1-linmq006@gmail.com
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/infiniband/core/cm.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/infiniband/core/cm.c
+++ b/drivers/infiniband/core/cm.c
@@ -1280,8 +1280,10 @@ struct ib_cm_id *ib_cm_insert_listen(str
 		return ERR_CAST(cm_id_priv);
 
 	err = cm_init_listen(cm_id_priv, service_id, 0);
-	if (err)
+	if (err) {
+		ib_destroy_cm_id(&cm_id_priv->id);
 		return ERR_PTR(err);
+	}
 
 	spin_lock_irq(&cm_id_priv->lock);
 	listen_id_priv = cm_insert_listen(cm_id_priv, cm_handler);