linux-kernel - Re: [PATCH RESEND bpf v2 0/2] x86/bpf: Fixes for the BPF JIT with retbleed=stuff

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Date: Wed, 3 Apr 2024 09:26:44 +0200
From: Ingo Molnar <mingo@...nel.org>
To: patchwork-bot+netdevbpf@...nel.org, ast@...nel.org,
	daniel@...earbox.net
Cc: Uros Bizjak <ubizjak@...il.com>, x86@...nel.org, bpf@...r.kernel.org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	ast@...nel.org, daniel@...earbox.net
Subject: Re: [PATCH RESEND bpf v2 0/2] x86/bpf: Fixes for the BPF JIT with
 retbleed=stuff


* patchwork-bot+netdevbpf@...nel.org <patchwork-bot+netdevbpf@...nel.org> wrote:

> Hello:
> 
> This series was applied to bpf/bpf.git (master)
> by Alexei Starovoitov <ast@...nel.org>:
> 
> On Mon,  1 Apr 2024 20:55:28 +0200 you wrote:
> > From: Joan Bruguera Micó <joanbrugueram@...il.com>
> > 
> > Fixes two issues that cause kernels panic when using the BPF JIT with
> > the call depth tracking / stuffing mitigation for Skylake processors
> > (`retbleed=stuff`). Both issues can be triggered by running simple
> > BPF programs (e.g. running the test suite should trigger both).
> > 
> > [...]
> 
> Here is the summary with links:
>   - [RESEND,bpf,v2,1/2] x86/bpf: Fix IP after emitting call depth accounting
>     https://git.kernel.org/bpf/bpf/c/9d98aa088386
>   - [RESEND,bpf,v2,2/2] x86/bpf: Fix IP for relocating call depth accounting
>     https://git.kernel.org/bpf/bpf/c/6a537453000a

Just wondering, which kernel version is this targeted for?

The bug is upstream as well, so a fix needs to be sent to Linus.

I can pick all of this up into tip:x86/urgent, if that accelerates 
things.

Thanks,

	Ingo