diff mbox series

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

Message ID 20240510095803.472840-4-kunwu.chan@linux.dev (mailing list archive)
State Changes Requested
Delegated to: BPF
Headers show
Series Add some 'malloc' failure checks | expand

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Commit Message

Kunwu Chan May 10, 2024, 9:58 a.m. UTC 
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(+)

Comments

Muhammad Usama Anjum May 10, 2024, 11:23 a.m. UTC | #1 
On 5/10/24 2:58 PM, kunwu.chan@linux.dev wrote:
> 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>
LGTM
Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com>

> ---
>  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));
diff mbox series

Patch

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));