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Subject[PATCH bpf-next v2 3/4] selftests/bpf: Add a null pointer check for the load_btf_spec
Date
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));
--
2.40.1

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