6.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Daniel Borkmann daniel@iogearbox.net
[ Upstream commit 17e8e5d6e09adb4b4f4fb5c89b3ec3fcae2c64a6 ]
Alexei reported:
After fast forwarding bpf-next today bpf_nf test started to fail when run twice:
$ ./test_progs -t bpf_nf #17 bpf_nf:OK Summary: 1/10 PASSED, 0 SKIPPED, 0 FAILED
$ ./test_progs -t bpf_nf All error logs: test_bpf_nf_ct:PASS:test_bpf_nf__open_and_load 0 nsec test_bpf_nf_ct:PASS:iptables-legacy -t raw -A PREROUTING -j CONNMARK --set-mark 42/0 0 nsec (network_helpers.c:102: errno: Address already in use) Failed to bind socket test_bpf_nf_ct:FAIL:start_server unexpected start_server: actual -1 < expected 0 #17/1 bpf_nf/xdp-ct:FAIL test_bpf_nf_ct:PASS:test_bpf_nf__open_and_load 0 nsec test_bpf_nf_ct:PASS:iptables-legacy -t raw -A PREROUTING -j CONNMARK --set-mark 42/0 0 nsec (network_helpers.c:102: errno: Address already in use) Failed to bind socket test_bpf_nf_ct:FAIL:start_server unexpected start_server: actual -1 < expected 0 #17/2 bpf_nf/tc-bpf-ct:FAIL #17 bpf_nf:FAIL Summary: 0/8 PASSED, 0 SKIPPED, 1 FAILED
I was able to locally reproduce as well. Rearrange the connection teardown so that the client closes its connection first so that we don't need to linger in TCP time-wait.
Fixes: e81fbd4c1ba7 ("selftests/bpf: Add existing connection bpf_*_ct_lookup() test") Reported-by: Alexei Starovoitov ast@kernel.org Signed-off-by: Daniel Borkmann daniel@iogearbox.net Link: https://lore.kernel.org/bpf/CAADnVQ+0dnDq_v_vH1EfkacbfGnHANaon7zsw10pMb-D9FS... Link: https://lore.kernel.org/bpf/20230626131942.5100-1-daniel@iogearbox.net Signed-off-by: Sasha Levin sashal@kernel.org --- tools/testing/selftests/bpf/prog_tests/bpf_nf.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/bpf/prog_tests/bpf_nf.c b/tools/testing/selftests/bpf/prog_tests/bpf_nf.c index c8ba4009e4ab9..b30ff6b3b81ae 100644 --- a/tools/testing/selftests/bpf/prog_tests/bpf_nf.c +++ b/tools/testing/selftests/bpf/prog_tests/bpf_nf.c @@ -123,12 +123,13 @@ static void test_bpf_nf_ct(int mode) ASSERT_EQ(skel->data->test_snat_addr, 0, "Test for source natting"); ASSERT_EQ(skel->data->test_dnat_addr, 0, "Test for destination natting"); end: - if (srv_client_fd != -1) - close(srv_client_fd); if (client_fd != -1) close(client_fd); + if (srv_client_fd != -1) + close(srv_client_fd); if (srv_fd != -1) close(srv_fd); + snprintf(cmd, sizeof(cmd), iptables, "-D"); system(cmd); test_bpf_nf__destroy(skel);