linux-hardening - [PATCH 0/2] mm: vmalloc: Actually use the in-place vrealloc region

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Message-Id: <20250515214020.work.519-kees@kernel.org>
Date: Thu, 15 May 2025 14:42:14 -0700
From: Kees Cook <kees@...nel.org>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Kees Cook <kees@...nel.org>,
	Shung-Hsi Yu <shung-hsi.yu@...e.com>,
	Eduard Zingerman <eddyz87@...il.com>,
	Pawan Gupta <pawan.kumar.gupta@...ux.intel.com>,
	Uladzislau Rezki <urezki@...il.com>,
	Erhard Furtner <erhard_f@...lbox.org>,
	Danilo Krummrich <dakr@...nel.org>,
	linux-kernel@...r.kernel.org,
	linux-mm@...ck.org,
	bpf@...r.kernel.org,
	linux-hardening@...r.kernel.org
Subject: [PATCH 0/2] mm: vmalloc: Actually use the in-place vrealloc region

Hi,

This fixes a performance regression[1] with vrealloc(). This needs to
get into v6.15, which is where the regression originates, and then it'll
get backport to the -stable releases as well.

Thanks!

-Kees

[1] https://lore.kernel.org/lkml/20250515-bpf-verifier-slowdown-vwo2meju4cgp2su5ckj@6gi6ssxbnfqg/

Kees Cook (2):
  mm: vmalloc: Actually use the in-place vrealloc region
  mm: vmalloc: Only zero-init on vrealloc shrink

 mm/vmalloc.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

-- 
2.34.1