Commit bb3c3686 authored Dec 13, 2011 by David S. Miller

ipv6: Check dest prefix length on original route not copied one in rt6_alloc_cow().



After commit 8e2ec639 ("ipv6: don't
use inetpeer to store metrics for routes.") the test in rt6_alloc_cow()
for setting the ANYCAST flag is now wrong.

'rt' will always now have a plen of 128, because it is set explicitly
to 128 by ip6_rt_copy.

So to restore the semantics of the test, check the destination prefix
length of 'ort'.

Signed-off-by: David S. Miller <davem@davemloft.net>

parent 3f1e6d3f

net/ipv6/route.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -728,7 +728,7 @@ static struct rt6_info rt6_alloc_cow(const struct rt6_info ort,
		int attempts = !in_softirq();

		if (!(rt->rt6i_flags&RTF_GATEWAY)) {
		if (rt->rt6i_dst.plen != 128 &&
		if (ort->rt6i_dst.plen != 128 &&
		ipv6_addr_equal(&ort->rt6i_dst.addr, daddr))
		rt->rt6i_flags \|= RTF_ANYCAST;
		ipv6_addr_copy(&rt->rt6i_gateway, daddr);

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