linux-kernel - Re: [PATCH] mm/slub: Avoid recursive loop with kmemleak

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Message-ID: <Ziu_qOmgnWRdAByp@arm.com>
Date: Fri, 26 Apr 2024 15:52:24 +0100
From: Catalin Marinas <catalin.marinas@....com>
To: Kees Cook <keescook@...omium.org>
Cc: Suren Baghdasaryan <surenb@...gle.com>,
	Kent Overstreet <kent.overstreet@...ux.dev>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Christoph Lameter <cl@...ux.com>, Pekka Enberg <penberg@...nel.org>,
	David Rientjes <rientjes@...gle.com>,
	Joonsoo Kim <iamjoonsoo.kim@....com>,
	Vlastimil Babka <vbabka@...e.cz>,
	Roman Gushchin <roman.gushchin@...ux.dev>,
	Hyeonggon Yoo <42.hyeyoo@...il.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Re: [PATCH] mm/slub: Avoid recursive loop with kmemleak

On Thu, Apr 25, 2024 at 01:55:23PM -0700, Kees Cook wrote:
> The system will immediate fill up stack and crash when both
> CONFIG_DEBUG_KMEMLEAK and CONFIG_MEM_ALLOC_PROFILING are enabled.
> Avoid allocation tagging of kmemleak caches, otherwise recursive
> allocation tracking occurs.
> 
> Fixes: 279bb991b4d9 ("mm/slab: add allocation accounting into slab allocation and free paths")
> Signed-off-by: Kees Cook <keescook@...omium.org>

For the kmemleak bits:

Acked-by: Catalin Marinas <catalin.marinas@....com>