From 3bd0233f388e061c44d36a1ac614a3bb4a851b7e Mon Sep 17 00:00:00 2001 From: Andrii Nakryiko Date: Tue, 23 Nov 2021 16:23:20 -0800 Subject: [PATCH] selftests/bpf: Fix possible NULL passed to memcpy() with zero size Prevent sanitizer from complaining about passing NULL into memcpy(), even if it happens with zero size. Signed-off-by: Andrii Nakryiko Signed-off-by: Daniel Borkmann Link: https://lore.kernel.org/bpf/20211124002325.1737739-9-andrii@kernel.org --- tools/testing/selftests/bpf/prog_tests/core_reloc.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/bpf/prog_tests/core_reloc.c b/tools/testing/selftests/bpf/prog_tests/core_reloc.c index 1041d0c593f6..44a9868c70ea 100644 --- a/tools/testing/selftests/bpf/prog_tests/core_reloc.c +++ b/tools/testing/selftests/bpf/prog_tests/core_reloc.c @@ -881,7 +881,8 @@ void test_core_reloc(void) data = mmap_data; memset(mmap_data, 0, sizeof(*data)); - memcpy(data->in, test_case->input, test_case->input_len); + if (test_case->input_len) + memcpy(data->in, test_case->input, test_case->input_len); data->my_pid_tgid = my_pid_tgid; link = bpf_program__attach_raw_tracepoint(prog, tp_name); -- 2.11.0