linux-kernel - [PATCH 4.20 016/352] wil6210: fix memory leak in wil_find_tx_bcast

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Message-Id: <20190211141847.412358794@linuxfoundation.org>
Date:   Mon, 11 Feb 2019 15:14:03 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Lior David <liord@...eaurora.org>,
        Maya Erez <merez@...eaurora.org>,
        Kalle Valo <kvalo@...eaurora.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.20 016/352] wil6210: fix memory leak in wil_find_tx_bcast_2

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@...eaurora.org>
Signed-off-by: Maya Erez <merez@...eaurora.org>
Signed-off-by: Kalle Valo <kvalo@...eaurora.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 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