Commit e3fa461d authored by Nicolas Dichtel's avatar Nicolas Dichtel Committed by David S. Miller

ipv6: fix panic when forwarding a pkt with no in6 dev

kongweibin reported a kernel panic in ip6_forward() when input interface
has no in6 dev associated.

The following tc commands were used to reproduce this panic:
tc qdisc del dev vxlan100 root
tc qdisc add dev vxlan100 root netem corrupt 5%

CC: stable@vger.kernel.org
Fixes: ccd27f05 ("ipv6: fix 'disable_policy' for fwd packets")
Reported-by: default avatarkongweibin <kongweibin2@huawei.com>
Signed-off-by: default avatarNicolas Dichtel <nicolas.dichtel@6wind.com>
Reviewed-by: default avatarDavid Ahern <dsahern@kernel.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 1a7eb80d
...@@ -485,7 +485,7 @@ int ip6_forward(struct sk_buff *skb) ...@@ -485,7 +485,7 @@ int ip6_forward(struct sk_buff *skb)
goto drop; goto drop;
if (!net->ipv6.devconf_all->disable_policy && if (!net->ipv6.devconf_all->disable_policy &&
!idev->cnf.disable_policy && (!idev || !idev->cnf.disable_policy) &&
!xfrm6_policy_check(NULL, XFRM_POLICY_FWD, skb)) { !xfrm6_policy_check(NULL, XFRM_POLICY_FWD, skb)) {
__IP6_INC_STATS(net, idev, IPSTATS_MIB_INDISCARDS); __IP6_INC_STATS(net, idev, IPSTATS_MIB_INDISCARDS);
goto drop; goto drop;
......
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