[ 12/52] staging: r8712u: Do not queue cloned skb

[Greg Kroah-Hartman]

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

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

From: Larry Finger <Larry.Finger@xxxxxxxxxxxx>

commit fa16e5ea25d7dd83f663f333e70713aa2fa5dffe upstream.

Some post-3.4 kernels have a problem when a cloned skb is used in the
RX path. This patch handles one such case for r8712u.

The patch was suggested by Eric Dumazet.

Signed-off-by: Larry Finger <Larry.Finger@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/staging/rtl8712/rtl8712_recv.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/drivers/staging/rtl8712/rtl8712_recv.c
+++ b/drivers/staging/rtl8712/rtl8712_recv.c
@@ -1126,6 +1126,9 @@ static void recv_tasklet(void *priv)
 		recvbuf2recvframe(padapter, pskb);
 		skb_reset_tail_pointer(pskb);
 		pskb->len = 0;
-		skb_queue_tail(&precvpriv->free_recv_skb_queue, pskb);
+		if (!skb_cloned(pskb))
+			skb_queue_tail(&precvpriv->free_recv_skb_queue, pskb);
+		else
+			consume_skb(pskb);
 	}
 }


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