[PATCH AUTOSEL 5.7 269/274] selftests/bpf, flow_dissector: Close TAP device FD after the test

[Sasha Levin]

From: Jakub Sitnicki <ja...@cloudflare.com>

[ Upstream commit b8215dce7dfd817ca38807f55165bf502146cd68 ]

test_flow_dissector leaves a TAP device after it's finished, potentially
interfering with other tests that will run after it. Fix it by closing the
TAP descriptor on cleanup.

Fixes: 0905beec9f52 ("selftests/bpf: run flow dissector tests in skb-less mode")
Signed-off-by: Jakub Sitnicki <ja...@cloudflare.com>
Signed-off-by: Alexei Starovoitov <a...@kernel.org>
Link: https://lore.kernel.org/bpf/20200531082846.2117903-11-ja...@cloudflare.com
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
 tools/testing/selftests/bpf/prog_tests/flow_dissector.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/testing/selftests/bpf/prog_tests/flow_dissector.c 
b/tools/testing/selftests/bpf/prog_tests/flow_dissector.c
index 92563898867c..9f3634c9971d 100644
--- a/tools/testing/selftests/bpf/prog_tests/flow_dissector.c
+++ b/tools/testing/selftests/bpf/prog_tests/flow_dissector.c
@@ -523,6 +523,7 @@ void test_flow_dissector(void)
                CHECK_ATTR(err, tests[i].name, "bpf_map_delete_elem %d\n", err);
        }
 
+       close(tap_fd);
        bpf_prog_detach(prog_fd, BPF_FLOW_DISSECTOR);
        bpf_object__close(obj);
 }
-- 
2.25.1