linux-kernel - Re: [PATCH bpf-next v3 03/11] bpf: Return -EFAULT on misconfigurations

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Message-ID: <CAP01T76-_PadE-BViz4bQQYQHFCNJS0Txs065w99dEcxrP3kMA@mail.gmail.com>
Date: Fri, 2 May 2025 00:06:50 +0200
From: Kumar Kartikeya Dwivedi <memxor@...il.com>
To: Luis Gerhorst <luis.gerhorst@....de>
Cc: Alexei Starovoitov <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>, 
	Andrii Nakryiko <andrii@...nel.org>, Martin KaFai Lau <martin.lau@...ux.dev>, 
	Eduard Zingerman <eddyz87@...il.com>, Song Liu <song@...nel.org>, 
	Yonghong Song <yonghong.song@...ux.dev>, John Fastabend <john.fastabend@...il.com>, 
	KP Singh <kpsingh@...nel.org>, Stanislav Fomichev <sdf@...ichev.me>, Hao Luo <haoluo@...gle.com>, 
	Jiri Olsa <jolsa@...nel.org>, Puranjay Mohan <puranjay@...nel.org>, 
	Xu Kuohai <xukuohai@...weicloud.com>, Catalin Marinas <catalin.marinas@....com>, 
	Will Deacon <will@...nel.org>, Hari Bathini <hbathini@...ux.ibm.com>, 
	Christophe Leroy <christophe.leroy@...roup.eu>, Naveen N Rao <naveen@...nel.org>, 
	Madhavan Srinivasan <maddy@...ux.ibm.com>, Michael Ellerman <mpe@...erman.id.au>, 
	Nicholas Piggin <npiggin@...il.com>, Mykola Lysenko <mykolal@...com>, Shuah Khan <shuah@...nel.org>, 
	Henriette Herzog <henriette.herzog@....de>, Saket Kumar Bhaskar <skb99@...ux.ibm.com>, 
	Cupertino Miranda <cupertino.miranda@...cle.com>, Jiayuan Chen <mrpre@....com>, 
	Matan Shachnai <m.shachnai@...il.com>, Dimitar Kanaliev <dimitar.kanaliev@...eground.com>, 
	Shung-Hsi Yu <shung-hsi.yu@...e.com>, Daniel Xu <dxu@...uu.xyz>, bpf@...r.kernel.org, 
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
	linuxppc-dev@...ts.ozlabs.org, linux-kselftest@...r.kernel.org, 
	Maximilian Ott <ott@...fau.de>, Milan Stephan <milan.stephan@....de>
Subject: Re: [PATCH bpf-next v3 03/11] bpf: Return -EFAULT on misconfigurations

On Thu, 1 May 2025 at 09:48, Luis Gerhorst <luis.gerhorst@....de> wrote:
>
> Mark these cases as non-recoverable to later prevent them from being
> caught when they occur during speculative path verification.
>
> Eduard writes [1]:
>
>   The only pace I'm aware of that might act upon specific error code
>   from verifier syscall is libbpf. Looking through libbpf code, it seems
>   that this change does not interfere with libbpf.
>
> [1] https://lore.kernel.org/all/785b4531ce3b44a84059a4feb4ba458c68fce719.camel@gmail.com/
>
> Signed-off-by: Luis Gerhorst <luis.gerhorst@....de>
> Reviewed-by: Eduard Zingerman <eddyz87@...il.com>
> Acked-by: Henriette Herzog <henriette.herzog@....de>
> Cc: Maximilian Ott <ott@...fau.de>
> Cc: Milan Stephan <milan.stephan@....de>
> ---

Acked-by: Kumar Kartikeya Dwivedi <memxor@...il.com>