From: Andrii Nakryiko <andrii@kernel.org>
Date: Tue, 23 Nov 2021 16:23:20 -0800
Subject: selftests/bpf: Fix possible NULL passed to memcpy() with zero size
Patch-mainline: v5.17-rc1
Git-commit: 3bd0233f388e061c44d36a1ac614a3bb4a851b7e
References: jsc#PED-1368
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
Acked-by: Shung-Hsi Yu <shung-hsi.yu@suse.com>
---
tools/testing/selftests/bpf/prog_tests/core_reloc.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- 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);