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Date: Tue, 27 Mar 2018 15:10:53 -0700
From: Andrew Morton <>
To: Kees Cook <>
Cc: Boaz Harrosh <>,, Nick
 Desaulniers <>,
Subject: Re: [PATCH] exofs: Avoid VLA in structures

On Tue, 27 Mar 2018 13:39:04 -0700 Kees Cook <> wrote:

> On the quest to remove all VLAs from the kernel[1] this adjusts several
> cases where allocation is made after an array of structures that points
> back into the allocation. The allocations are changed to perform explicit
> calculations instead of using a Variable Length Array in a structure.
> Additionally, this lets Clang compile this code now, since Clang does not
> support VLAIS[2].
> [1]
> [2]
> ...
> I not sure the best way to test this. Kconfig implies I need special hardware?

Yeah, I was wondering about that.  It's a tricky-looking patch.

Boaz, are you able to give it a spin?


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