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| author | Wei-Chun Chao <weichunc@plumgrid.com> | 2015-07-22 18:13:12 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-07-26 20:54:56 -0700 |
| commit | 48fb6b554501914b6befcf9b38292cbeb91de330 (patch) | |
| tree | 5b560b4de122a290fd2a0e0b1898f3c19bea111e /net/ipv6/ip6_input.c | |
| parent | 6ac9de5f656352b24ab2cb3e925f078c8c809a19 (diff) | |
| download | linux-48fb6b554501914b6befcf9b38292cbeb91de330.tar.gz linux-48fb6b554501914b6befcf9b38292cbeb91de330.tar.bz2 linux-48fb6b554501914b6befcf9b38292cbeb91de330.zip | |
ipv6: fix crash over flow-based vxlan device
Similar check was added in ip_rcv but not in ipv6_rcv.
BUG: unable to handle kernel NULL pointer dereference at (null)
IP: [<ffffffff81734e0a>] ipv6_rcv+0xfa/0x500
Call Trace:
[<ffffffff816c9786>] ? ip_rcv+0x296/0x400
[<ffffffff817732d2>] ? packet_rcv+0x52/0x410
[<ffffffff8168e99f>] __netif_receive_skb_core+0x63f/0x9a0
[<ffffffffc02b34a0>] ? br_handle_frame_finish+0x580/0x580 [bridge]
[<ffffffff8109912c>] ? update_rq_clock.part.81+0x1c/0x40
[<ffffffff8168ed18>] __netif_receive_skb+0x18/0x60
[<ffffffff8168fa1f>] process_backlog+0x9f/0x150
Fixes: ee122c79d422 (vxlan: Flow based tunneling)
Signed-off-by: Wei-Chun Chao <weichunc@plumgrid.com>
Acked-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/ip6_input.c')
| -rw-r--r-- | net/ipv6/ip6_input.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/net/ipv6/ip6_input.c b/net/ipv6/ip6_input.c index 57990c929cd8..adba03ac7ce9 100644 --- a/net/ipv6/ip6_input.c +++ b/net/ipv6/ip6_input.c @@ -45,6 +45,7 @@ #include <net/addrconf.h> #include <net/xfrm.h> #include <net/inet_ecn.h> +#include <net/dst_metadata.h> int ip6_rcv_finish(struct sock *sk, struct sk_buff *skb) { @@ -55,7 +56,7 @@ int ip6_rcv_finish(struct sock *sk, struct sk_buff *skb) if (ipprot && ipprot->early_demux) ipprot->early_demux(skb); } - if (!skb_dst(skb)) + if (!skb_valid_dst(skb)) ip6_route_input(skb); return dst_input(skb); @@ -98,7 +99,7 @@ int ipv6_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt * arrived via the sending interface (ethX), because of the * nature of scoping architecture. --yoshfuji */ - IP6CB(skb)->iif = skb_dst(skb) ? ip6_dst_idev(skb_dst(skb))->dev->ifindex : dev->ifindex; + IP6CB(skb)->iif = skb_valid_dst(skb) ? ip6_dst_idev(skb_dst(skb))->dev->ifindex : dev->ifindex; if (unlikely(!pskb_may_pull(skb, sizeof(*hdr)))) goto err; |