linux-kernel - Re: [PATCH bpf-next 0/2] bpf: Fix verifier_bug_if to account for BPF

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Message-Id: 
 <176965500835.2326292.18318567298833649268.git-patchwork-notify@kernel.org>
Date: Thu, 29 Jan 2026 02:50:08 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Luis Gerhorst <luis.gerhorst@....de>
Cc: ast@...nel.org, daniel@...earbox.net, john.fastabend@...il.com,
 andrii@...nel.org, martin.lau@...ux.dev, eddyz87@...il.com, song@...nel.org,
 yonghong.song@...ux.dev, kpsingh@...nel.org, sdf@...ichev.me,
 haoluo@...gle.com, jolsa@...nel.org, shuah@...nel.org, isolodrai@...a.com,
 memxor@...il.com, bpf@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-kselftest@...r.kernel.org
Subject: Re: [PATCH bpf-next 0/2] bpf: Fix verifier_bug_if to account for
 BPF_CALL

Hello:

This series was applied to bpf/bpf-next.git (master)
by Alexei Starovoitov <ast@...nel.org>:

On Tue, 27 Jan 2026 12:59:10 +0100 you wrote:
> This fixes the verifier_bug_if() that runs on nospec_result to not trigger
> for BPF_CALL (bug reported by Hu, Mei, and Mu). See patch 1 for a full
> description and patch 2 for a test (based on the PoC from the report).
> 
> While working on this I noticed two other problems:
> 
> - nospec_result is currently ignored for BPF_CALL during patching, but it
>   may be required if we assume the CPU may speculate into/out of functions.
> 
> [...]

Here is the summary with links:
  - [bpf-next,1/2] bpf: Fix verifier_bug_if to account for BPF_CALL
    https://git.kernel.org/bpf/bpf-next/c/cd3b6a3d49f8
  - [bpf-next,2/2] bpf: Test nospec after dead stack write in helper
    https://git.kernel.org/bpf/bpf-next/c/60d2c438c1bb

You are awesome, thank you!
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