Commit bb3c3686 authored by David S. Miller's avatar 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: default avatarDavid S. Miller <davem@davemloft.net>
parent 3f1e6d3f
...@@ -728,7 +728,7 @@ static struct rt6_info *rt6_alloc_cow(const struct rt6_info *ort, ...@@ -728,7 +728,7 @@ static struct rt6_info *rt6_alloc_cow(const struct rt6_info *ort,
int attempts = !in_softirq(); int attempts = !in_softirq();
if (!(rt->rt6i_flags&RTF_GATEWAY)) { 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)) ipv6_addr_equal(&ort->rt6i_dst.addr, daddr))
rt->rt6i_flags |= RTF_ANYCAST; rt->rt6i_flags |= RTF_ANYCAST;
ipv6_addr_copy(&rt->rt6i_gateway, daddr); ipv6_addr_copy(&rt->rt6i_gateway, daddr);
......
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