From: Phillip Potter <phil@philpotter.co.uk>
To: davem@davemloft.net
Cc: kuba@kernel.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org, sd@queasysnail.net,
edumazet@google.com, fw@strlen.de
Subject: [PATCH v2] net: geneve: modify IP header check in geneve6_xmit_skb and geneve_xmit_skb
Date: Fri, 23 Apr 2021 00:49:45 +0100 [thread overview]
Message-ID: <20210422234945.1190-1-phil@philpotter.co.uk> (raw)
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>
---
V2:
* Incorporated feedback from Sabrina Dubroca regarding pskb_inet_may_pull
* Added Fixes: tag as requested by Eric Dumazet
---
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 42f31c681846..61cd3dd4deab 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);
--
2.30.2
next reply other threads:[~2021-04-22 23:49 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-22 23:49 Phillip Potter [this message]
2021-04-23 13:41 ` [PATCH v2] net: geneve: modify IP header check in geneve6_xmit_skb and geneve_xmit_skb Sabrina Dubroca
2021-04-23 20:44 ` David Miller
2021-04-23 20:30 ` patchwork-bot+netdevbpf
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