From: Alex Gartrell <agartr...@fb.com>
Previously there was a trivial panic
unshare -n /bin/bash <<EOF
ip addr add dev lo face::1/128
ipvsadm -A -t [face::1]:15213
ipvsadm -a -t [face::1]:15213 -r b00c::1
echo boom | nc face::1 15213
EOF
This patch allows us to replicate the net logic above and simply capture
the skb_dst(skb)->dev and use that for the purpose of the invocation.
Signed-off-by: Alex Gartrell <agartr...@fb.com>
Acked-by: Julian Anastasov <j...@ssi.bg>
Signed-off-by: Simon Horman <ho...@verge.net.au>
---
net/netfilter/ipvs/ip_vs_xmit.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/net/netfilter/ipvs/ip_vs_xmit.c b/net/netfilter/ipvs/ip_vs_xmit.c
index bf66a8657a5f..b99d80695b1f 100644
--- a/net/netfilter/ipvs/ip_vs_xmit.c
+++ b/net/netfilter/ipvs/ip_vs_xmit.c
@@ -505,6 +505,13 @@ err_put:
return -1;
err_unreach:
+ /* The ip6_link_failure function requires the dev field to be set
+ * in order to get the net (further for the sake of fwmark
+ * reflection).
+ */
+ if (!skb->dev)
+ skb->dev = skb_dst(skb)->dev;
+
dst_link_failure(skb);
return -1;
}
--
2.1.4
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