linux-kernel - Re: [PATCH] selftests/bpf: Fix incorrect parameters in NULL pointer checking

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Message-ID: <02dd26b5-16a0-4732-80e4-c7bf183e965a@linux.dev>
Date: Wed, 21 Aug 2024 14:03:17 -0700
From: Yonghong Song <yonghong.song@...ux.dev>
To: Hao Ge <hao.ge@...ux.dev>, ast@...nel.org, daniel@...earbox.net,
 andrii@...nel.org, martin.lau@...ux.dev, eddyz87@...il.com, song@...nel.org,
 john.fastabend@...il.com, kpsingh@...nel.org, sdf@...ichev.me,
 haoluo@...gle.com, jolsa@...nel.org, mykolal@...com, shuah@...nel.org
Cc: bpf@...r.kernel.org, linux-kselftest@...r.kernel.org,
 linux-kernel@...r.kernel.org, Hao Ge <gehao@...inos.cn>,
 Dan Carpenter <dan.carpenter@...aro.org>
Subject: Re: [PATCH] selftests/bpf: Fix incorrect parameters in NULL pointer
 checking


On 8/19/24 7:34 PM, Hao Ge wrote:
> From: Hao Ge <gehao@...inos.cn>
>
> Smatch reported the following warning:
>      ./tools/testing/selftests/bpf/testing_helpers.c:455 get_xlated_program()
>      warn: variable dereferenced before check 'buf' (see line 454)
>
> It seems correct,so let's modify it based on it's suggestion.
>
> Actually,commit b23ed4d74c4d ("selftests/bpf: Fix invalid pointer
> check in get_xlated_program()") fixed an issue in the test_verifier.c
> once,but it was reverted this time.
>
> Let's solve this issue with the minimal changes possible.
>
> Reported-by: Dan Carpenter <dan.carpenter@...aro.org>
> Closes: https://lore.kernel.org/all/1eb3732f-605a-479d-ba64-cd14250cbf91@stanley.mountain/
> Fixes: b4b7a4099b8c ("selftests/bpf: Factor out get_xlated_program() helper")
> Signed-off-by: Hao Ge <gehao@...inos.cn>

In the future, please change subject '[PATCH] ...' to '[PATCH bpf-next] ...'
so CI can properly test it.

Acked-by: Yonghong Song <yonghong.song@...ux.dev>