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Subject: Re: [PATCH] bpf: Replace 0-length arrays with flexible arrays
From:   patchwork-bot+netdevbpf@kernel.org
Message-Id: <167339101599.28902.5327791124067545987.git-patchwork-notify@kernel.org>
Date:   Tue, 10 Jan 2023 22:50:15 +0000
References: <20230105192646.never.154-kees@kernel.org>
In-Reply-To: <20230105192646.never.154-kees@kernel.org>
To:     Kees Cook <keescook@chromium.org>
Cc:     ast@kernel.org, daniel@iogearbox.net, john.fastabend@gmail.com,
        andrii@kernel.org, martin.lau@linux.dev, song@kernel.org,
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List-ID: <bpf.vger.kernel.org>
X-Mailing-List: bpf@vger.kernel.org

Hello:

This patch was applied to bpf/bpf-next.git (master)
by Daniel Borkmann <daniel@iogearbox.net>:

On Thu,  5 Jan 2023 11:26:47 -0800 you wrote:
> Zero-length arrays are deprecated[1]. Replace struct bpf_array's
> union of 0-length arrays with flexible arrays. (How are the
> sizes of these arrays verified?) Detected with GCC 13, using
> -fstrict-flex-arrays=3:
> 
> arch/x86/net/bpf_jit_comp.c: In function 'bpf_tail_call_direct_fixup':
> arch/x86/net/bpf_jit_comp.c:606:37: warning: array subscript <unknown> is outside array bounds of 'void *[0]' [-Warray-bounds=]
>   606 |                 target = array->ptrs[poke->tail_call.key];
>       |                          ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~
> In file included from include/linux/filter.h:9,
>                  from arch/x86/net/bpf_jit_comp.c:9:
> include/linux/bpf.h:1527:23: note: while referencing 'ptrs'
>  1527 |                 void *ptrs[0] __aligned(8);
>       |                       ^~~~
> 
> [...]

Here is the summary with links:
  - bpf: Replace 0-length arrays with flexible arrays
    https://git.kernel.org/bpf/bpf-next/c/129d868ede1e

You are awesome, thank you!
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