wireguard: selftests: make sure rp_filter is disabled on vethc

Some distros may enable strict rp_filter by default, which will prevent vethc from receiving the packets with an unrouteable reverse path address. Reported-by: Hangbin Liu <[email protected]> Fixes: e7096c1 ("net: WireGuard secure network tunnel") Cc: [email protected] Signed-off-by: Jason A. Donenfeld <[email protected]> Signed-off-by: David S. Miller <[email protected]>
jix · Jun 4, 2021 · f8873d1 · f8873d1
1 parent acf2492
commit f8873d1
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/tools/testing/selftests/wireguard/netns.sh b/tools/testing/selftests/wireguard/netns.sh
@@ -363,6 +363,7 @@ ip1 -6 rule add table main suppress_prefixlength 0
 ip1 -4 route add default dev wg0 table 51820
 ip1 -4 rule add not fwmark 51820 table 51820
 ip1 -4 rule add table main suppress_prefixlength 0
+n1 bash -c 'printf 0 > /proc/sys/net/ipv4/conf/vethc/rp_filter'
 # Flood the pings instead of sending just one, to trigger routing table reference counting bugs.
 n1 ping -W 1 -c 100 -f 192.168.99.7
 n1 ping -W 1 -c 100 -f abab::1111