From: Mina Almasry <almasrymina@google.com>
To: Mike Kravetz <mike.kravetz@oracle.com>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>,
YueHaibing <yuehaibing@huawei.com>,
Axel Rasmussen <axelrasmussen@google.com>,
Peter Xu <peterx@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] mm: Make copy_huge_page() always available
Date: Mon, 12 Jul 2021 12:32:44 -0700 [thread overview]
Message-ID: <CAHS8izP7Q8VX+kpzzEUML625aPVOJkUADFs-gnBXWF-QaeKKhA@mail.gmail.com> (raw)
In-Reply-To: <9877bef9-b2e8-6a8c-4d68-7df7f3fb71eb@oracle.com>
On Mon, Jul 12, 2021 at 10:52 AM Mike Kravetz <mike.kravetz@oracle.com> wrote:
>
> On 7/12/21 8:32 AM, Matthew Wilcox (Oracle) wrote:
> > Rewrite copy_huge_page() and move it into mm/util.c so it's always
> > available. Fixes an exposure of uninitialised memory on configurations
> > with HUGETLB and UFFD enabled and MIGRATION disabled.
> >
> > Fixes: 8cc5fcbb5be8 ("mm, hugetlb: fix racy resv_huge_pages underflow on UFFDIO_COPY")
> > Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-By: Mina Almasry <almasrymina@google.com>
> > ---
> > include/linux/migrate.h | 5 -----
> > include/linux/mm.h | 1 +
> > mm/migrate.c | 48 -----------------------------------------
> > mm/util.c | 10 +++++++++
> > 4 files changed, 11 insertions(+), 53 deletions(-)
>
> Thanks Matthew,
>
> Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
> --
> Mike Kravetz
next prev parent reply other threads:[~2021-07-12 19:32 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-12 15:32 [PATCH] mm: Make copy_huge_page() always available Matthew Wilcox (Oracle)
2021-07-12 17:52 ` Mike Kravetz
2021-07-12 19:32 ` Mina Almasry [this message]
2021-07-14 2:12 ` Andrew Morton
2021-07-14 2:20 ` Matthew Wilcox
2021-07-14 16:09 ` Linus Torvalds
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