[PATCH 3.16 121/366] net: initialize skb->peeked when cloning

[Ben Hutchings]

3.16.60-rc1 review patch.  If anyone has any objections, please let me know.

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

From: Eric Dumazet <edumazet@xxxxxxxxxx>

commit b13dda9f9aa7caceeee61c080c2e544d5f5d85e5 upstream.

syzbot reported __skb_try_recv_from_queue() was using skb->peeked
while it was potentially unitialized.

We need to clear it in __skb_clone()

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Eric Dumazet <edumazet@xxxxxxxxxx>
Reported-by: syzbot <syzkaller@xxxxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
---
 net/core/skbuff.c | 1 +
 1 file changed, 1 insertion(+)

--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -767,6 +767,7 @@ static struct sk_buff *__skb_clone(struc
 	n->hdr_len = skb->nohdr ? skb_headroom(skb) : skb->hdr_len;
 	n->cloned = 1;
 	n->nohdr = 0;
+	n->peeked = 0;
 	n->destructor = NULL;
 	C(tail);
 	C(end);