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Date:   Wed, 28 Sep 2022 11:06:07 -0700
From:   Kees Cook <>
To:     Linus Torvalds <>
Cc:     Gwan-gyeong Mun <>,,,,,,,,,,,,,,,,,,,,,,,,,
Subject: Re: [PATCH v13 5/9] drm/i915: Check for integer truncation on
 scatterlist creation

On Wed, Sep 28, 2022 at 10:09:04AM -0700, Linus Torvalds wrote:
> Kees, you need to reign in the craziness in overflow.h.

Understood. I've been trying to help the drm folks walk a line between
having a bunch of custom macros hidden away in the drm includes and
building up generalized versions that are actually helpful beyond drm.
But I can see that it doesn't help to have a "do two things at the same
time" macro for the assignment checking.

Kees Cook

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