From: Matthew Wilcox <willy@infradead.org>
To: Hugh Dickins <hughd@google.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Yang Shi <shy828301@gmail.com>,
Wang Yugui <wangyugui@e16-tech.com>,
Naoya Horiguchi <naoya.horiguchi@nec.com>,
Alistair Popple <apopple@nvidia.com>,
Ralph Campbell <rcampbell@nvidia.com>, Zi Yan <ziy@nvidia.com>,
Miaohe Lin <linmiaohe@huawei.com>,
Minchan Kim <minchan@kernel.org>, Jue Wang <juew@google.com>,
Peter Xu <peterx@redhat.com>, Jan Kara <jack@suse.cz>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 4/7] mm/thp: fix page_address_in_vma() on file THP tails
Date: Tue, 1 Jun 2021 22:32:47 +0100 [thread overview]
Message-ID: <YLanf/fmB2D5B1Ew@casper.infradead.org> (raw)
In-Reply-To: <alpine.LSU.2.11.2106011409390.2148@eggly.anvils>
On Tue, Jun 01, 2021 at 02:11:22PM -0700, Hugh Dickins wrote:
> From: Jue Wang <juew@google.com>
>
> Anon THP tails were already supported, but memory-failure may need to use
> page_address_in_vma() on file THP tails, which its page->mapping check did
> not permit: fix it.
>
> hughd adds: no current usage is known to hit the issue, but this does fix
> a subtle trap in a general helper: best fixed in stable sooner than later.
>
> Fixes: 800d8c63b2e9 ("shmem: add huge pages support")
> Signed-off-by: Jue Wang <juew@google.com>
> Signed-off-by: Hugh Dickins <hughd@google.com>
> Cc: <stable@vger.kernel.org>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
next prev parent reply other threads:[~2021-06-01 21:33 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-01 21:03 [PATCH 0/7] mm/thp: fix THP splitting unmap BUGs and related Hugh Dickins
2021-06-01 21:05 ` [PATCH 1/7] mm/thp: fix __split_huge_pmd_locked() on shmem migration entry Hugh Dickins
2021-06-03 21:26 ` Yang Shi
2021-06-04 2:22 ` Hugh Dickins
2021-06-04 18:03 ` Yang Shi
2021-06-04 21:52 ` Hugh Dickins
2021-06-04 15:34 ` Kirill A. Shutemov
2021-06-04 21:29 ` Hugh Dickins
2021-06-01 21:07 ` [PATCH 2/7] mm/thp: try_to_unmap() use TTU_SYNC for safe DEBUG_VM splitting Hugh Dickins
2021-06-02 1:59 ` Alistair Popple
2021-06-03 21:45 ` Yang Shi
2021-06-04 2:45 ` Hugh Dickins
2021-06-04 18:24 ` Yang Shi
2021-06-03 21:48 ` Peter Xu
2021-06-04 2:54 ` Hugh Dickins
2021-06-04 14:48 ` Peter Xu
2021-06-04 22:26 ` Hugh Dickins
2021-06-04 15:47 ` Kirill A. Shutemov
2021-06-01 21:09 ` [PATCH 3/7] mm/thp: fix vma_address() if virtual address below file offset Hugh Dickins
2021-06-01 21:30 ` Matthew Wilcox
2021-06-03 21:36 ` Hugh Dickins
2021-06-03 21:40 ` [PATCH v2 " Hugh Dickins
2021-06-04 15:53 ` Kirill A. Shutemov
2021-06-04 17:36 ` Matthew Wilcox
2021-06-04 22:35 ` Hugh Dickins
2021-06-01 21:11 ` [PATCH 4/7] mm/thp: fix page_address_in_vma() on file THP tails Hugh Dickins
2021-06-01 21:32 ` Matthew Wilcox [this message]
2021-06-03 22:06 ` Yang Shi
2021-06-04 15:54 ` Kirill A. Shutemov
2021-06-01 21:13 ` [PATCH 5/7] mm/thp: fix page_vma_mapped_walk() if huge page mapped by ptes Hugh Dickins
2021-06-04 16:24 ` Kirill A. Shutemov
2021-06-04 17:42 ` Matthew Wilcox
2021-06-04 22:56 ` Hugh Dickins
2021-06-01 21:15 ` [PATCH 6/7] mm/thp: unmap_mapping_page() to fix THP truncate_cleanup_page() Hugh Dickins
2021-06-04 16:39 ` Kirill A. Shutemov
2021-06-04 23:07 ` Hugh Dickins
2021-06-01 21:17 ` [PATCH 7/7] mm/thp: remap_page() is only needed on anonymous THP Hugh Dickins
2021-06-03 22:09 ` Yang Shi
2021-06-04 16:41 ` Kirill A. Shutemov
2021-06-02 2:07 ` [PATCH 0/7] mm/thp: fix THP splitting unmap BUGs and related Alistair Popple
2021-06-03 22:21 ` Hugh Dickins
2021-06-03 23:03 ` Andrew Morton
2021-06-03 22:26 ` [PATCH 6.1/7] mm: thp: replace DEBUG_VM BUG with VM_WARN when unmap fails for split Hugh Dickins
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