linux-kernel - Re: [PATCH v4 2/2] slab: Introduce kmalloc

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Message-ID: <e019c59a-ba8b-ec04-dc5b-923cf9dd9d9c@gentwo.org>
Date: Tue, 7 Oct 2025 10:47:21 -0700 (PDT)
From: "Christoph Lameter (Ampere)" <cl@...two.org>
To: Kees Cook <kees@...nel.org>
cc: Matthew Wilcox <willy@...radead.org>, Vlastimil Babka <vbabka@...e.cz>, 
    Pekka Enberg <penberg@...nel.org>, David Rientjes <rientjes@...gle.com>, 
    Joonsoo Kim <iamjoonsoo.kim@....com>, 
    Andrew Morton <akpm@...ux-foundation.org>, 
    Roman Gushchin <roman.gushchin@...ux.dev>, 
    Hyeonggon Yoo <42.hyeyoo@...il.com>, 
    "Gustavo A . R . Silva" <gustavoars@...nel.org>, 
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    Marco Elver <elver@...gle.com>, 
    Linus Torvalds <torvalds@...ux-foundation.org>, 
    Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
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    llvm@...ts.linux.dev
Subject: Re: [PATCH v4 2/2] slab: Introduce kmalloc_obj() and family

On Tue, 7 Oct 2025, Kees Cook wrote:

> But all of that is orthogonal to just _having_ the type info available.

iOS did go the path of creating basically one slab cache for each
"type" of kmalloc for security reasons.

See https://security.apple.com/blog/towards-the-next-generation-of-xnu-memory-safety/