linux-stable.git/tools/testing/selftests/bpf, branch v6.0

selftests/bpf: Add regression test for pruning fix

2022-08-25T19:07:45+00:00

Add a test to ensure we do mark_chain_precision for the argument type
ARG_CONST_ALLOC_SIZE_OR_ZERO. For other argument types, this was already
done, but propagation for missing for this case. Without the fix, this
test case loads successfully.

Signed-off-by: Kumar Kartikeya Dwivedi 
Link: https://lore.kernel.org/r/20220823185500.467-1-memxor@gmail.com
Signed-off-by: Alexei Starovoitov

selftests/bpf: Add lru_bug to s390x deny list

2022-08-12T16:21:28+00:00

The lru_bug BPF selftest is failing execution on s390x machines. The
failure is due to program attachment failing in turn, similar to a bunch
of other tests. Those other tests have already been deny-listed and with
this change we do the same for the lru_bug test, adding it to the
corresponding file.

Fixes: de7b9927105b ("selftests/bpf: Add test for prealloc_lru_pop bug")
Signed-off-by: Daniel Müller 
Acked-by: Mykola Lysenko 
Link: https://lore.kernel.org/r/20220810200710.1300299-1-deso@posteo.net
Signed-off-by: Alexei Starovoitov

selftests/bpf: Ensure sleepable program is rejected by hash map iter

2022-08-10T17:12:48+00:00

Add a test to ensure sleepable program is rejected by hash map iterator.

Signed-off-by: Hou Tao 
Acked-by: Yonghong Song 
Link: https://lore.kernel.org/r/20220810080538.1845898-10-houtao@huaweicloud.com
Signed-off-by: Alexei Starovoitov

selftests/bpf: Add write tests for sk local storage map iterator

2022-08-10T17:12:48+00:00

Add test to validate the overwrite of sock local storage map value in
map iterator and another one to ensure out-of-bound value writing is
rejected.

Signed-off-by: Hou Tao 
Acked-by: Yonghong Song 
Acked-by: Martin KaFai Lau 
Link: https://lore.kernel.org/r/20220810080538.1845898-9-houtao@huaweicloud.com
Signed-off-by: Alexei Starovoitov

selftests/bpf: Add tests for reading a dangling map iter fd

2022-08-10T17:12:48+00:00

After closing both related link fd and map fd, reading the map
iterator fd to ensure it is OK to do so.

Signed-off-by: Hou Tao 
Acked-by: Yonghong Song 
Link: https://lore.kernel.org/r/20220810080538.1845898-8-houtao@huaweicloud.com
Signed-off-by: Alexei Starovoitov

selftests/bpf: Add test for prealloc_lru_pop bug

2022-08-10T01:46:11+00:00

Add a regression test to check against invalid check_and_init_map_value
call inside prealloc_lru_pop.

The kptr should not be reset to NULL once we set it after deleting the
map element. Hence, we trigger a program that updates the element
causing its reuse, and checks whether the unref kptr is reset or not.
If it is, prealloc_lru_pop does an incorrect check_and_init_map_value
call and the test fails.

Acked-by: Yonghong Song 
Signed-off-by: Kumar Kartikeya Dwivedi 
Link: https://lore.kernel.org/r/20220809213033.24147-4-memxor@gmail.com
Signed-off-by: Alexei Starovoitov

selftests/bpf: Excercise bpf_obj_get_info_by_fd for bpf2bpf

2022-08-08T13:53:39+00:00

Apparently, no existing selftest covers it. Add a new one where
we load cgroup/bind4 program and attach fentry to it. Calling
bpf_obj_get_info_by_fd on the fentry program should return non-zero
btf_id/btf_obj_id instead of crashing the kernel.

Signed-off-by: Stanislav Fomichev 
Signed-off-by: Daniel Borkmann 
Acked-by: Martin KaFai Lau 
Link: https://lore.kernel.org/bpf/20220804201140.1340684-2-sdf@google.com

selftests/bpf: Bump internal send_signal/send_signal_tracepoint timeout

2022-07-29T18:10:01+00:00

The send_signal/send_signal_tracepoint is pretty flaky, with at least
one failure in every ten runs on a few attempts I've tried it:
  > test_send_signal_common:PASS:pipe_c2p 0 nsec
  > test_send_signal_common:PASS:pipe_p2c 0 nsec
  > test_send_signal_common:PASS:fork 0 nsec
  > test_send_signal_common:PASS:skel_open_and_load 0 nsec
  > test_send_signal_common:PASS:skel_attach 0 nsec
  > test_send_signal_common:PASS:pipe_read 0 nsec
  > test_send_signal_common:PASS:pipe_write 0 nsec
  > test_send_signal_common:PASS:reading pipe 0 nsec
  > test_send_signal_common:PASS:reading pipe error: size 0 0 nsec
  > test_send_signal_common:FAIL:incorrect result unexpected incorrect result: actual 48 != expected 50
  > test_send_signal_common:PASS:pipe_write 0 nsec
  > #139/1   send_signal/send_signal_tracepoint:FAIL

The reason does not appear to be a correctness issue in the strict
sense. Rather, we merely do not receive the signal we are waiting for
within the provided timeout.
Let's bump the timeout by a factor of ten. With that change I have not
been able to reproduce the failure in 150+ iterations. I am also sneaking
in a small simplification to the test_progs test selection logic.

Signed-off-by: Daniel Müller 
Signed-off-by: Andrii Nakryiko 
Acked-by: Jiri Olsa 
Acked-by: Yonghong Song 
Link: https://lore.kernel.org/bpf/20220727182955.4044988-1-deso@posteo.net

selftests/bpf: Adjust vmtest.sh to use local kernel configuration

2022-07-27T15:03:14+00:00

So far the vmtest.sh script, which can be used as a convenient way to
run bpf selftests, has obtained the kernel config safe to use for
testing from the libbpf/libbpf GitHub repository [0].

Given that we now have included this configuration into this very
repository, we can just consume it from here as well, eliminating the
necessity of remote accesses.

With this change we adjust the logic in the script to use the
configuration from below tools/testing/selftests/bpf/configs/ instead
of pulling it over the network.

  [0] https://github.com/libbpf/libbpf

Signed-off-by: Daniel Müller 
Signed-off-by: Daniel Borkmann 
Acked-by: Martin KaFai Lau 
Acked-by: Mykola Lysenko 
Link: https://lore.kernel.org/bpf/20220727001156.3553701-4-deso@posteo.net

selftests/bpf: Copy over libbpf configs

2022-07-27T15:02:38+00:00

This change integrates libbpf maintained configurations and black/white
lists [0] into the repository, co-located with the BPF selftests themselves.
We minimize the kernel configurations to keep future updates as small as
possible [1].

Furthermore, we make both kernel configurations build on top of the existing
configuration tools/testing/selftests/bpf/config (to be concatenated before
build). Lastly, we replaced the terms blacklist & whitelist with denylist and
allowlist, respectively.

  [0] https://github.com/libbpf/libbpf/tree/20f03302350a4143825cedcbd210c4d7112c1898/travis-ci/vmtest/configs
  [1] https://lore.kernel.org/bpf/20220712212124.3180314-1-deso@posteo.net/T/#m30a53648352ed494e556ac003042a9ad0a8f98c6

Signed-off-by: Daniel Müller 
Signed-off-by: Daniel Borkmann 
Acked-by: Martin KaFai Lau 
Acked-by: Mykola Lysenko 
Link: https://lore.kernel.org/bpf/20220727001156.3553701-3-deso@posteo.net