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| /openbmc/linux/drivers/net/ |
| H A D | macvlan.c | diff 260916dfb48c374f7840f3b86e69afd3afdb6e96 Tue May 31 22:43:00 CDT 2016 Herbert Xu <herbert@gondor.apana.org.au> macvlan: Fix potential use-after free for broadcasts
When we postpone a broadcast packet we save the source port in
the skb if it is local. However, the source port can disappear
before we get a chance to process the packet.
This patch fixes this by holding a ref count on the netdev.
It also delays the skb->cb modification until after we allocate
the new skb as you should not modify shared skbs.
Fixes: 412ca1550cbe ("macvlan: Move broadcasts into a work queue")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
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