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

[kunwu . chan]

From: Kunwu Chan <chen...@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 <chen...@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));
-- 
2.40.1