From: Phillip Potter phil@philpotter.co.uk
[ Upstream commit d13f048dd40e8577260cd43faea8ec9b77520197 ]
Modify the header size check in geneve6_xmit_skb and geneve_xmit_skb to use pskb_inet_may_pull rather than pskb_network_may_pull. This fixes two kernel selftest failures introduced by the commit introducing the checks: IPv4 over geneve6: PMTU exceptions IPv4 over geneve6: PMTU exceptions - nexthop objects
It does this by correctly accounting for the fact that IPv4 packets may transit over geneve IPv6 tunnels (and vice versa), and still fixes the uninit-value bug fixed by the original commit.
Reported-by: kernel test robot oliver.sang@intel.com Fixes: 6628ddfec758 ("net: geneve: check skb is large enough for IPv4/IPv6 header") Suggested-by: Sabrina Dubroca sd@queasysnail.net Signed-off-by: Phillip Potter phil@philpotter.co.uk Acked-by: Sabrina Dubroca sd@queasysnail.net Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/geneve.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/geneve.c b/drivers/net/geneve.c index 040edc6fc560..0d8eb4a1dc2f 100644 --- a/drivers/net/geneve.c +++ b/drivers/net/geneve.c @@ -891,7 +891,7 @@ static int geneve_xmit_skb(struct sk_buff *skb, struct net_device *dev, __be16 sport; int err;
- if (!pskb_network_may_pull(skb, sizeof(struct iphdr))) + if (!pskb_inet_may_pull(skb)) return -EINVAL;
sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true); @@ -988,7 +988,7 @@ static int geneve6_xmit_skb(struct sk_buff *skb, struct net_device *dev, __be16 sport; int err;
- if (!pskb_network_may_pull(skb, sizeof(struct ipv6hdr))) + if (!pskb_inet_may_pull(skb)) return -EINVAL;
sport = udp_flow_src_port(geneve->net, skb, 1, USHRT_MAX, true);