linux-kernel - Re: [PATCH 6.14 000/197] 6.14.7-rc2 review

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Message-ID: <vrvefaimjqkseuoyuhgg6omt2ypgp5v6xwwuxihj2t5jidizyr@ir5w67k4kl36>
Date: Thu, 15 May 2025 20:15:32 +0800
From: Shung-Hsi Yu <shung-hsi.yu@...e.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: stable@...r.kernel.org, patches@...ts.linux.dev, 
	linux-kernel@...r.kernel.org, torvalds@...ux-foundation.org, akpm@...ux-foundation.org, 
	linux@...ck-us.net, shuah@...nel.org, patches@...nelci.org, 
	lkft-triage@...ts.linaro.org, pavel@...x.de, jonathanh@...dia.com, f.fainelli@...il.com, 
	sudipm.mukherjee@...il.com, srw@...dewatkins.net, rwarsow@....de, conor@...nel.org, 
	hargar@...rosoft.com, broonie@...nel.org, kees@...nel.org
Subject: Re: [PATCH 6.14 000/197] 6.14.7-rc2 review

On Wed, May 14, 2025 at 03:04:16PM +0200, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 6.14.7 release.
> There are 197 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
...
> Kees Cook <kees@...nel.org>
>     mm: vmalloc: support more granular vrealloc() sizing

The above is causing a slow down in BPF verifier[1]. Assuming BPF
selftests are somewhat representing of real world BPF programs, the slow
down would be around 2x on average, but for an unrealistic worth-case it
could go as high as 40x[2].

1: https://lore.kernel.org/stable/20250515041659.smhllyarxdwp7cav@desk/
2: https://lore.kernel.org/stable/g4fpslyse2s6hnprgkbp23ykxn67q5wabbkpivuc3rro5bivo4@sj2o3nd5vwwm/