[PATCH bpf-next v2 4/4] selftests/bpf: Add a null pointer check for the serial_test_tp_attach_query

From: Kunwu Chan chentao@kylinos.cn

There is a 'malloc' call, which can be unsuccessful. Add the malloc failure checking to avoid possible null dereference.

Signed-off-by: Kunwu Chan chentao@kylinos.cn Suggested-by: Daniel Borkmann daniel@iogearbox.net --- Changes in v2: - Use ASSERT* instead of CHECK - Add suggested-by tag --- tools/testing/selftests/bpf/prog_tests/tp_attach_query.c | 3 +++ 1 file changed, 3 insertions(+)

diff --git a/tools/testing/selftests/bpf/prog_tests/tp_attach_query.c b/tools/testing/selftests/bpf/prog_tests/tp_attach_query.c index 655d69f0ff0b..a5ebfc172ad8 100644 --- a/tools/testing/selftests/bpf/prog_tests/tp_attach_query.c +++ b/tools/testing/selftests/bpf/prog_tests/tp_attach_query.c @@ -39,6 +39,9 @@ void serial_test_tp_attach_query(void) attr.wakeup_events = 1;

query = malloc(sizeof(*query) + sizeof(__u32) * num_progs); + if (!ASSERT_OK_PTR(query, "malloc")) + return; + for (i = 0; i < num_progs; i++) { err = bpf_prog_test_load(file, BPF_PROG_TYPE_TRACEPOINT, &obj[i], &prog_fd[i]);