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| author | Lorenzo Colitti <lorenzo@google.com> | 2016-11-29 18:56:47 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-11-30 20:53:59 +0100 |
| commit | d109e61bfe7a468fd8df4a7ceb65635e7aa909a0 (patch) | |
| tree | 4741bcdc0b14d1dfe4e2fd40fd15eee4a6155529 /net/ipv4/route.c | |
| parent | bpf: add test for the verifier equal logic bug (diff) | |
| download | linux-d109e61bfe7a468fd8df4a7ceb65635e7aa909a0.tar.xz linux-d109e61bfe7a468fd8df4a7ceb65635e7aa909a0.zip | |
net: ipv4: Don't crash if passing a null sk to ip_rt_update_pmtu.
Commit e2d118a1cb5e ("net: inet: Support UID-based routing in IP
protocols.") made __build_flow_key call sock_net(sk) to determine
the network namespace of the passed-in socket. This crashes if sk
is NULL.
Fix this by getting the network namespace from the skb instead.
Fixes: e2d118a1cb5e ("net: inet: Support UID-based routing in IP protocols.")
Reported-by: Erez Shitrit <erezsh@dev.mellanox.co.il>
Signed-off-by: Lorenzo Colitti <lorenzo@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/route.c')
| -rw-r--r-- | net/ipv4/route.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv4/route.c b/net/ipv4/route.c index d37fc6f7e679..6402d745d192 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -531,13 +531,14 @@ static void __build_flow_key(const struct net *net, struct flowi4 *fl4, static void build_skb_flow_key(struct flowi4 *fl4, const struct sk_buff *skb, const struct sock *sk) { + const struct net *net = dev_net(skb->dev); const struct iphdr *iph = ip_hdr(skb); int oif = skb->dev->ifindex; u8 tos = RT_TOS(iph->tos); u8 prot = iph->protocol; u32 mark = skb->mark; - __build_flow_key(sock_net(sk), fl4, sk, iph, oif, tos, prot, mark, 0); + __build_flow_key(net, fl4, sk, iph, oif, tos, prot, mark, 0); } static void build_sk_flow_key(struct flowi4 *fl4, const struct sock *sk) |