[PATCH net v3] net: thunderbolt: fix memory leak in tbnet_open()

From: Zhengchao Shao <shaozhengchao@huawei.com>
To: <netdev@vger.kernel.org>, <michael.jamet@intel.com>,
	<mika.westerberg@linux.intel.com>, <YehezkelShB@gmail.com>,
	<davem@davemloft.net>, <edumazet@google.com>, <kuba@kernel.org>,
	<pabeni@redhat.com>
Cc: <weiyongjun1@huawei.com>, <yuehaibing@huawei.com>,
	<shaozhengchao@huawei.com>
Subject: [PATCH net v3] net: thunderbolt: fix memory leak in tbnet_open()
Date: Wed, 7 Dec 2022 09:50:01 +0800	[thread overview]
Message-ID: <20221207015001.1755826-1-shaozhengchao@huawei.com> (raw)

When tb_ring_alloc_rx() failed in tbnet_open(), ida that allocated in
tb_xdomain_alloc_out_hopid() is not released. Add
tb_xdomain_release_out_hopid() to the error path to release ida.

Fixes: 180b0689425c ("thunderbolt: Allow multiple DMA tunnels over a single XDomain connection")
Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
---
v3: add patch description
v2: move release ida before free tx_ring
---
 drivers/net/thunderbolt.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/thunderbolt.c b/drivers/net/thunderbolt.c
index a52ee2bf5575..6312f67f260e 100644
--- a/drivers/net/thunderbolt.c
+++ b/drivers/net/thunderbolt.c
@@ -914,6 +914,7 @@ static int tbnet_open(struct net_device *dev)
 				eof_mask, tbnet_start_poll, net);
 	if (!ring) {
 		netdev_err(dev, "failed to allocate Rx ring\n");
+		tb_xdomain_release_out_hopid(xd, hopid);
 		tb_ring_free(net->tx_ring.ring);
 		net->tx_ring.ring = NULL;
 		return -ENOMEM;
-- 
2.34.1

