Re: [PATCH] bpf: Replace 0-length arrays with flexible arrays

From: patchwork-bot+netdevbpf
Date: Tue Jan 10 2023 - 17:52:31 EST


Hello:

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

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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