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From: Kunwu Chan <chentao@kylinos.cn>
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Cc: bpf@vger.kernel.org,
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	linux-kernel@vger.kernel.org,
	Kunwu Chan <chentao@kylinos.cn>
Subject: [PATCH bpf-next 3/4] selftests/bpf: Add a null pointer check for the load_btf_spec
Date: Wed, 24 Apr 2024 10:04:43 +0800
Message-Id: <20240424020444.2375773-4-chentao@kylinos.cn>
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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,
 	);
=20
 	raw_btf =3D malloc(sizeof(hdr) + types_len + strings_len);
+	if (!raw_btf)
+		return -ENOMEM;
=20
 	ptr =3D raw_btf;
 	memcpy(ptr, &hdr, sizeof(hdr));
--=20
2.40.1