[PATCH 4.20 016/352] wil6210: fix memory leak in wil_find_tx_bcast_2

[Greg Kroah-Hartman]

4.20-stable review patch.  If anyone has any objections, please let me know.

------------------

[ Upstream commit 664497400c89a4d40aee51bcf48bbd2e4dc71104 ]

A successful call to wil_tx_ring takes skb reference so
it will only be freed in wil_tx_complete. Consume the skb
in wil_find_tx_bcast_2 to prevent memory leak.

Signed-off-by: Lior David <liord@xxxxxxxxxxxxxx>
Signed-off-by: Maya Erez <merez@xxxxxxxxxxxxxx>
Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/net/wireless/ath/wil6210/txrx.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/wireless/ath/wil6210/txrx.c b/drivers/net/wireless/ath/wil6210/txrx.c
index cc5f263cc965..005c4ba9e823 100644
--- a/drivers/net/wireless/ath/wil6210/txrx.c
+++ b/drivers/net/wireless/ath/wil6210/txrx.c
@@ -1403,6 +1403,8 @@ found:
 			wil_dbg_txrx(wil, "BCAST DUP -> ring %d\n", i);
 			wil_set_da_for_vring(wil, skb2, i);
 			wil_tx_ring(wil, vif, v2, skb2);
+			/* successful call to wil_tx_ring takes skb2 ref */
+			dev_kfree_skb_any(skb2);
 		} else {
 			wil_err(wil, "skb_copy failed\n");
 		}
-- 
2.19.1