linux-kernel - [PATCH] IB/sa: Fix memleak in ib_nl_make

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Date:   Sun, 20 Dec 2020 16:13:14 +0800
From:   Dinghao Liu <dinghao.liu@....edu.cn>
To:     dinghao.liu@....edu.cn, kjlu@....edu
Cc:     Doug Ledford <dledford@...hat.com>, Jason Gunthorpe <jgg@...pe.ca>,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        Ursula Braun <ubraun@...ux.ibm.com>,
        Leon Romanovsky <leon@...nel.org>,
        Håkon Bugge <haakon.bugge@...cle.com>,
        Divya Indi <divya.indi@...cle.com>,
        Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] IB/sa: Fix memleak in ib_nl_make_request

When rdma_nl_multicast() fails, skb should be freed
just like when ibnl_put_msg() fails.

Signed-off-by: Dinghao Liu <dinghao.liu@....edu.cn>
---
 drivers/infiniband/core/sa_query.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/infiniband/core/sa_query.c b/drivers/infiniband/core/sa_query.c
index 89a831fa1885..8bd23b5cc913 100644
--- a/drivers/infiniband/core/sa_query.c
+++ b/drivers/infiniband/core/sa_query.c
@@ -873,8 +873,10 @@ static int ib_nl_make_request(struct ib_sa_query *query, gfp_t gfp_mask)
 	spin_lock_irqsave(&ib_nl_request_lock, flags);
 	ret = rdma_nl_multicast(&init_net, skb, RDMA_NL_GROUP_LS, gfp_flag);
 
-	if (ret)
+	if (ret) {
+		nlmsg_free(skb);
 		goto out;
+	}
 
 	/* Put the request on the list.*/
 	delay = msecs_to_jiffies(sa_local_svc_timeout_ms);
-- 
2.17.1