From bd5c49a1615e36260a86184d087b5b47a5e747be Mon Sep 17 00:00:00 2001 From: Ignas Bacius Date: Fri, 3 Jan 2020 15:05:46 +0200 Subject: sr: fix possible null-pointer dereference Steps to reproduce VPP crash: 1. configure localsid End behavior 2. ping the localsid address Type: fix Signed-off-by: Ignas Bacius Change-Id: Id780e0875ec9cdb25252217990919fb3dddbf06a --- src/plugins/srv6-am/test/test_srv6.py | 35 ++++++++++++++++++++++++++--------- 1 file changed, 26 insertions(+), 9 deletions(-) (limited to 'src/plugins') diff --git a/src/plugins/srv6-am/test/test_srv6.py b/src/plugins/srv6-am/test/test_srv6.py index b1a2d8de0b3..d53147de3ff 100644 --- a/src/plugins/srv6-am/test/test_srv6.py +++ b/src/plugins/srv6-am/test/test_srv6.py @@ -546,9 +546,18 @@ class TestSRv6(VppTestCase): # TODO: test behavior with SL=0 packet (needs 2*SRH?) + expected_count = len(pkts) + + # packets without SRH (should not crash) + packet_header = self.create_packet_header_IPv6('a3::') + # create traffic stream pg0->pg1 + pkts.extend(self.create_stream(self.pg0, self.pg1, packet_header, + self.pg_packet_sizes, count)) + # send packets and verify received packets self.send_and_verify_pkts(self.pg0, pkts, self.pg1, - self.compare_rx_tx_packet_End) + self.compare_rx_tx_packet_End, + expected_count=expected_count) # log the localsid counters self.logger.info(self.vapi.cli("show sr localsid")) @@ -1823,13 +1832,16 @@ class TestSRv6(VppTestCase): self.logger.info("Done creating packets") return pkts - def send_and_verify_pkts(self, input, pkts, output, compare_func): + def send_and_verify_pkts(self, input, pkts, output, compare_func, + expected_count=None): """Send packets and verify received packets using compare_func :param input: ingress interface of DUT :param pkts: list of packets to transmit :param output: egress interface of DUT :param compare_func: function to compare in and out packets + :param expected_count: expected number of captured packets (if + different than len(pkts)) """ # add traffic stream to input interface input.add_stream(pkts) @@ -1843,7 +1855,7 @@ class TestSRv6(VppTestCase): # get output capture self.logger.info("Getting packet capture") - capture = output.get_capture() + capture = output.get_capture(expected_count=expected_count) # assert nothing was captured on input interface input.assert_nothing_captured() @@ -2126,13 +2138,18 @@ class TestSRv6(VppTestCase): self.logger.error(ppp("Unexpected or invalid packet:", packet)) raise + # FIXME: there is no need to check manually that all the packets + # arrived (already done so by get_capture); checking here + # prevents testing packets that are expected to be dropped, so + # commenting this out for now + # have all expected packets arrived? - for i in self.pg_interfaces: - remaining_packet = self.get_next_packet_info_for_interface2( - i.sw_if_index, dst_sw_if_index, last_info[i.sw_if_index]) - self.assertTrue(remaining_packet is None, - "Interface %s: Packet expected from interface %s " - "didn't arrive" % (dst_if.name, i.name)) + # for i in self.pg_interfaces: + # remaining_packet = self.get_next_packet_info_for_interface2( + # i.sw_if_index, dst_sw_if_index, last_info[i.sw_if_index]) + # self.assertTrue(remaining_packet is None, + # "Interface %s: Packet expected from interface %s " + # "didn't arrive" % (dst_if.name, i.name)) if __name__ == '__main__': -- cgit 1.2.3-korg