[ 12/56] staging: r8712u: Do not queue cloned skb

From: Greg Kroah-Hartman
Date: Thu Oct 04 2012 - 18:17:28 EST


3.6-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
@@ -1127,6 +1127,9 @@ 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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