From: Muhammad Usama Anjum <usama.anjum@collabora.com>
To: kunwu.chan@linux.dev, ast@kernel.org, daniel@iogearbox.net,
andrii@kernel.org, martin.lau@linux.dev, eddyz87@gmail.com,
song@kernel.org, yonghong.song@linux.dev,
john.fastabend@gmail.com, kpsingh@kernel.org, sdf@google.com,
haoluo@google.com, jolsa@kernel.org, mykolal@fb.com,
shuah@kernel.org, kunwu.chan@hotmail.com
Cc: Muhammad Usama Anjum <usama.anjum@collabora.com>,
bpf@vger.kernel.org, linux-kselftest@vger.kernel.org,
linux-kernel@vger.kernel.org, Kunwu Chan <chentao@kylinos.cn>
Subject: Re: [PATCH bpf-next v2 3/4] selftests/bpf: Add a null pointer check for the load_btf_spec
Date: Fri, 10 May 2024 16:23:22 +0500 [thread overview]
Message-ID: <8020398d-497c-48fa-a733-4edc391838ac@collabora.com> (raw)
In-Reply-To: <20240510095803.472840-4-kunwu.chan@linux.dev>
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));
--
BR,
Muhammad Usama Anjum
next prev parent reply other threads:[~2024-05-10 11:23 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-10 9:57 [PATCH bpf-next v2 0/4] Add some 'malloc' failure checks kunwu.chan
2024-05-10 9:58 ` [PATCH bpf-next v2 1/4] selftests/bpf: Add some null pointer checks kunwu.chan
2024-05-10 11:20 ` Muhammad Usama Anjum
2024-05-13 7:00 ` Kunwu Chan
2024-05-13 7:52 ` Markus Elfring
2024-05-10 9:58 ` [PATCH bpf-next v2 2/4] selftests/bpf/sockopt: Add a null pointer check for the run_test kunwu.chan
2024-05-10 11:22 ` Muhammad Usama Anjum
2024-05-10 9:58 ` [PATCH bpf-next v2 3/4] selftests/bpf: Add a null pointer check for the load_btf_spec kunwu.chan
2024-05-10 11:23 ` Muhammad Usama Anjum [this message]
2024-05-10 9:58 ` [PATCH bpf-next v2 4/4] selftests/bpf: Add a null pointer check for the serial_test_tp_attach_query kunwu.chan
2024-05-10 11:24 ` Muhammad Usama Anjum
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