ipv6: fix panic when forwarding a pkt with no in6 dev
commit e3fa461d8b0e185b7da8a101fe94dfe6dd500ac0 upstream. 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: ccd27f05ae7b ("ipv6: fix 'disable_policy' for fwd packets") Reported-by: kongweibin <kongweibin2@huawei.com> Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Reviewed-by: David Ahern <dsahern@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -506,7 +506,7 @@ int ip6_forward(struct sk_buff *skb)
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goto drop;
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if (!net->ipv6.devconf_all->disable_policy &&
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!idev->cnf.disable_policy &&
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(!idev || !idev->cnf.disable_policy) &&
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!xfrm6_policy_check(NULL, XFRM_POLICY_FWD, skb)) {
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__IP6_INC_STATS(net, idev, IPSTATS_MIB_INDISCARDS);
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goto drop;
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