linux-kernel - Re: CVE-2023-52560: mm/damon/vaddr-test: fix memory leak in damon_do_test_apply_three

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Message-ID: <ZeggFvhW-nLqM6G-@tiehlicka>
Date: Wed, 6 Mar 2024 08:49:42 +0100
From: Michal Hocko <mhocko@...e.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: cve@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: CVE-2023-52560: mm/damon/vaddr-test: fix memory leak in
 damon_do_test_apply_three_regions()

On Tue 05-03-24 22:25:11, Greg KH wrote:
> On Tue, Mar 05, 2024 at 05:51:11PM +0100, Michal Hocko wrote:
> > On Sat 02-03-24 22:59:54, Greg KH wrote:
> > > Description
> > > ===========
> > > 
> > > In the Linux kernel, the following vulnerability has been resolved:
> > > 
> > > mm/damon/vaddr-test: fix memory leak in damon_do_test_apply_three_regions()
> > > 
> > > When CONFIG_DAMON_VADDR_KUNIT_TEST=y and making CONFIG_DEBUG_KMEMLEAK=y
> > > and CONFIG_DEBUG_KMEMLEAK_AUTO_SCAN=y, the below memory leak is detected.
> > 
> > This is a kunit test case AFAICS. Is this really a CVE material?
> 
> People run kunit tests on real systems (again, we do not dictate use
> cases.)  So yes, fixing a memory leak that can be triggered is resolving
> a weakness and so should get a CVE I would think, right?

This is stretching the meaning of CVE beyond my imagination. Up to you
to decide but I yet have to see a real production system that casually
runs unit test just for <looking for a reason .... but failed>.
-- 
Michal Hocko
SUSE Labs