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authorStephen Suryaputra <ssuryaextr@gmail.com>2019-04-01 09:17:32 -0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-04-17 08:36:45 +0200
commit5f5d628adc1dd5542f7d1a08b2bbd808c1186c7e (patch)
tree83546a95acc4b09cdb29e27518999425e302310e
parent051ca6a515a8cfd2b88b0b7f53a1ecb60e0881a6 (diff)
vrf: check accept_source_route on the original netdevice
[ Upstream commit 8c83f2df9c6578ea4c5b940d8238ad8a41b87e9e ] Configuration check to accept source route IP options should be made on the incoming netdevice when the skb->dev is an l3mdev master. The route lookup for the source route next hop also needs the incoming netdev. v2->v3: - Simplify by passing the original netdevice down the stack (per David Ahern). Signed-off-by: Stephen Suryaputra <ssuryaextr@gmail.com> Reviewed-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--include/net/ip.h2
-rw-r--r--net/ipv4/ip_input.c7
-rw-r--r--net/ipv4/ip_options.c4
3 files changed, 6 insertions, 7 deletions
diff --git a/include/net/ip.h b/include/net/ip.h
index f06cd30bb44c..a3c1b9dfc9a1 100644
--- a/include/net/ip.h
+++ b/include/net/ip.h
@@ -580,7 +580,7 @@ int ip_options_get_from_user(struct net *net, struct ip_options_rcu **optp,
unsigned char __user *data, int optlen);
void ip_options_undo(struct ip_options *opt);
void ip_forward_options(struct sk_buff *skb);
-int ip_options_rcv_srr(struct sk_buff *skb);
+int ip_options_rcv_srr(struct sk_buff *skb, struct net_device *dev);
/*
* Functions provided by ip_sockglue.c
diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c
index bcadca26523b..ce0ce1401f28 100644
--- a/net/ipv4/ip_input.c
+++ b/net/ipv4/ip_input.c
@@ -259,11 +259,10 @@ int ip_local_deliver(struct sk_buff *skb)
ip_local_deliver_finish);
}
-static inline bool ip_rcv_options(struct sk_buff *skb)
+static inline bool ip_rcv_options(struct sk_buff *skb, struct net_device *dev)
{
struct ip_options *opt;
const struct iphdr *iph;
- struct net_device *dev = skb->dev;
/* It looks as overkill, because not all
IP options require packet mangling.
@@ -299,7 +298,7 @@ static inline bool ip_rcv_options(struct sk_buff *skb)
}
}
- if (ip_options_rcv_srr(skb))
+ if (ip_options_rcv_srr(skb, dev))
goto drop;
}
@@ -361,7 +360,7 @@ static int ip_rcv_finish(struct net *net, struct sock *sk, struct sk_buff *skb)
}
#endif
- if (iph->ihl > 5 && ip_rcv_options(skb))
+ if (iph->ihl > 5 && ip_rcv_options(skb, dev))
goto drop;
rt = skb_rtable(skb);
diff --git a/net/ipv4/ip_options.c b/net/ipv4/ip_options.c
index 4cd3b5ad9cee..570cdb547234 100644
--- a/net/ipv4/ip_options.c
+++ b/net/ipv4/ip_options.c
@@ -614,7 +614,7 @@ void ip_forward_options(struct sk_buff *skb)
}
}
-int ip_options_rcv_srr(struct sk_buff *skb)
+int ip_options_rcv_srr(struct sk_buff *skb, struct net_device *dev)
{
struct ip_options *opt = &(IPCB(skb)->opt);
int srrspace, srrptr;
@@ -649,7 +649,7 @@ int ip_options_rcv_srr(struct sk_buff *skb)
orefdst = skb->_skb_refdst;
skb_dst_set(skb, NULL);
- err = ip_route_input(skb, nexthop, iph->saddr, iph->tos, skb->dev);
+ err = ip_route_input(skb, nexthop, iph->saddr, iph->tos, dev);
rt2 = skb_rtable(skb);
if (err || (rt2->rt_type != RTN_UNICAST && rt2->rt_type != RTN_LOCAL)) {
skb_dst_drop(skb);