Re: [PATCH 5.12 669/700] hugetlb: address ref count racing in prep_compound_gigantic_page

On 7/11/21 11:12 PM, Greg Kroah-Hartman wrote:

From: Mike Kravetz <redacted>

[ Upstream commit 7118fc2906e2925d7edb5ed9c8a57f2a5f23b849 ]

Please do not add or the requisite patch to stable tree.

Although this is a real potential issue, it was only found during code
inspection.  It has existed for more than 10 years and I am unaware of
anyone hitting this in actual use.  In addition, this proposed fix will
likely be updated/simplified based on more discussions.
-- 
Mike Kravetz