[PATCH bpf-next v2 3/4] selftests/bpf: Add a null pointer check for the load_btf_spec

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 --- tools/testing/selftests/bpf/test_verifier.c | 2 ++ 1 file changed, 2 insertions(+)

diff --git a/tools/testing/selftests/bpf/test_verifier.c b/tools/testing/selftests/bpf/test_verifier.c index df04bda1c927..9c80b2943418 100644 --- a/tools/testing/selftests/bpf/test_verifier.c +++ b/tools/testing/selftests/bpf/test_verifier.c @@ -762,6 +762,8 @@ static int load_btf_spec(__u32 *types, int types_len, );

raw_btf = malloc(sizeof(hdr) + types_len + strings_len); + if (!raw_btf) + return -ENOMEM;

ptr = raw_btf; memcpy(ptr, &hdr, sizeof(hdr));