[PATCH bpf-next v1 2/2] selftests/bpf: Cover oversized stream read buffers
Kumar Kartikeya Dwivedi <[email protected]>
| Newsgroups | org.kernel.vger.bpf |
|---|---|
| Message-ID | <[email protected]> |
Exercise BPF_PROG_STREAM_READ_BY_FD with a UINT_MAX buffer length and require EINVAL. Continue with the existing two-part read of the queued payload to verify that rejecting the oversized request does not consume or otherwise disturb stream data. Signed-off-by: Kumar Kartikeya Dwivedi <[email protected]> --- tools/testing/selftests/bpf/prog_tests/stream.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/tools/testing/selftests/bpf/prog_tests/stream.c b/tools/testing/selftests/bpf/prog_tests/stream.c index 4d8054a23cc7..74bd15c4bfba 100644 --- a/tools/testing/selftests/bpf/prog_tests/stream.c +++ b/tools/testing/selftests/bpf/prog_tests/stream.c @@ -46,6 +46,10 @@ void test_stream_syscall(void) ret = -errno; ASSERT_EQ(ret, -EFAULT, "bad stream buf"); + ASSERT_LT(bpf_prog_stream_read(prog_fd, BPF_STREAM_STDOUT, buf, UINT_MAX, NULL), 0, "error"); + ret = -errno; + ASSERT_EQ(ret, -EINVAL, "large stream buf"); + ret = bpf_prog_stream_read(prog_fd, BPF_STREAM_STDOUT, buf, 2, NULL); ASSERT_EQ(ret, 2, "bytes"); ret = bpf_prog_stream_read(prog_fd, BPF_STREAM_STDOUT, buf, 2, NULL); -- 2.53.0