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UPSTREAM: udp: initialize is_flist with 0 in udp_gro_receive

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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>

Bug: 167707933
Change-Id: Icd2977dfb7506ce0f83d88f52184aa282bc2cac3
(cherry picked from commit bde1b56f898ca8112912d7b36e55e1543b3be0cf)
Signed-off-by: Hyunsoon Kim <h10.kim@samsung.com>
This commit is contained in:
Xin Long 2020-03-30 23:31:45 +08:00 • committed by Greg Kroah-Hartman
commit 3a3ba4b7dd
1 changed files with 1 additions and 0 deletions
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1
net/ipv4/udp_offload.c
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@ -453,6 +453,7 @@ struct sk_buff *udp_gro_receive(struct list_head *head, struct sk_buff *skb,
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;