From: Andrii Nakryiko <andrii@kernel.org> mainline inclusion from mainline-5.17-rc1 commit 3bd0233f388e061c44d36a1ac614a3bb4a851b7e category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I5EUVD CVE: NA Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i... ------------------------------------------------- Prevent sanitizer from complaining about passing NULL into memcpy(), even if it happens with zero size. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20211124002325.1737739-9-andrii@kernel.org (cherry picked from commit 3bd0233f388e061c44d36a1ac614a3bb4a851b7e) Signed-off-by: Wang Yufen <wangyufen@huawei.com> --- 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 a47cd67c9451..636ea0287e83 100644 --- a/tools/testing/selftests/bpf/prog_tests/core_reloc.c +++ b/tools/testing/selftests/bpf/prog_tests/core_reloc.c @@ -891,7 +891,8 @@ 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); -- 2.20.1