From: Xin Long lucien.xin@gmail.com
[ Upstream commit bde1b56f898ca8112912d7b36e55e1543b3be0cf ]
Without NAPI_GRO_CB(skb)->is_flist initialized, when the dev doesn't support NETIF_F_GRO_FRAGLIST, is_flist can still be set and fraglist will be used in udp_gro_receive().
So fix it by initializing is_flist with 0 in udp_gro_receive.
Fixes: 9fd1ff5d2ac7 ("udp: Support UDP fraglist GRO/GSO.") Signed-off-by: Xin Long lucien.xin@gmail.com Acked-by: Steffen Klassert steffen.klassert@secunet.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/ipv4/udp_offload.c | 1 + 1 file changed, 1 insertion(+)
--- a/net/ipv4/udp_offload.c +++ b/net/ipv4/udp_offload.c @@ -453,6 +453,7 @@ struct sk_buff *udp_gro_receive(struct l unsigned int off = skb_gro_offset(skb); int flush = 1;
+ NAPI_GRO_CB(skb)->is_flist = 0; if (skb->dev->features & NETIF_F_GRO_FRAGLIST) NAPI_GRO_CB(skb)->is_flist = sk ? !udp_sk(sk)->gro_enabled: 1;