[PATCH] net: qrtr: fix node refcount leak on ctrl packet alloc failure

[Wentao Liang]

qrtr_send_resume_tx() calls qrtr_node_lookup() which takes a
reference on the returned node. If the subsequent call to
qrtr_alloc_ctrl_packet() fails due to memory allocation failure, the
function returns -ENOMEM without calling qrtr_node_release() to
release the node reference.

Add qrtr_node_release(node) before returning on the allocation failure
path to properly release the reference.

Cc: stable@xxxxxxxxxxxxxxx
Fixes: cb6530b99faf ("net: qrtr: Move resume-tx transmission to recvmsg")
Signed-off-by: Wentao Liang <vulab@xxxxxxxxxxx>
---
 net/qrtr/af_qrtr.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/qrtr/af_qrtr.c b/net/qrtr/af_qrtr.c
index 7cec6a7859b0..c9f892427f7c 100644
--- a/net/qrtr/af_qrtr.c
+++ b/net/qrtr/af_qrtr.c
@@ -1009,8 +1009,10 @@ static int qrtr_send_resume_tx(struct qrtr_cb *cb)
 		return -EINVAL;
 
 	skb = qrtr_alloc_ctrl_packet(&pkt, GFP_KERNEL);
-	if (!skb)
+	if (!skb) {
+		qrtr_node_release(node);
 		return -ENOMEM;
+	}
 
 	pkt->cmd = cpu_to_le32(QRTR_TYPE_RESUME_TX);
 	pkt->client.node = cpu_to_le32(cb->dst_node);
-- 
2.34.1