Re: [PATCH v4] mm, hugetlb: Fix simple resv_huge_pages underflow on UFFDIO_COPY
From: Mike Kravetz <hidden>
Date: 2021-06-01 16:59:19
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On 5/31/21 7:49 PM, Mina Almasry wrote:
On Mon, May 31, 2021 at 5:37 PM Andrew Morton [off-list ref] wrote:quoted
On Thu, 27 May 2021 17:46:49 -0700 Mina Almasry [off-list ref] wrote: Do we have a Fixes: for this, or is it an always-been-there issue?This reproduces as far back as 4.15 kernel. Looks like always-been-there issue.
Specifically,
Fixes: 8fb5debc5fcd ("userfaultfd: hugetlbfs: add hugetlb_mcopy_atomic_pte for userfaultfd support")
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Mike Kravetz