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Howlett" , Lorenzo Stoakes , Vlastimil Babka , Jann Horn , Pedro Falcato , Oscar Salvador , Miaohe Lin , Naoya Horiguchi , Adam Litke , Mel Gorman , Rik van Riel , Peter Xu , "Kiryl Shutsemau (Meta)" , "Mike Rapoport (Microsoft)" , Josef Bacik , linux-mm@kvack.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org Content-Transfer-Encoding: quoted-printable Message-Id: <921D5002-91A9-4FA1-83DD-A7D2D061628C@linux.dev> References: <20261015-urgent_fixes-v1-0-42796911043b@kernel.org> <20261015-urgent_fixes-v1-3-42796911043b@kernel.org> To: "David Hildenbrand (Arm)" X-Mailer: Apple Mail (2.3901.100.1.1.12) X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 02AEB80007 X-Rspam-User: X-Stat-Signature: ztypo8now1x36w43iijp6o4635gwp5ta X-HE-Tag: 1792135120-256821 X-HE-Meta: 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 glc5hyAt JRck6xZvlrscAyI6xPbuE5H09lSIjlJehfXP1h9v5TJwx7iyxVhRpPy94RZC8BfWuSvWe7lNjJiuujtfSFJ70ZF2Qv0iNbjjUF1eC5Ix70zhYKilKaQplemYhvu/nWmJYAVowlie2+0X8HwttEGE6PrKER3yiP5LYLjLoX83M10wKK78rGeqROgVYCJKnyrc6AQk1MSAk4YzHGKw2W1N9KTBlAGPd4kobNSbmofwCamSv5LkGivSSlY5+XOa2AGii0q2gGLwiEjkehl/FELUS10ZpeN+6HNKVPvEn5XNUUKYQBqkA0UzQbfXmquGmymMnnBRkGtDxjRWxQgI8RFf1Xyc8yiSnFf82dN6K5yXogMArrJ3jwe/7fX94y2+NHKH5xdiAC2pfoAq+nQ67Bd1eT5fZrkIGYe15pSzgUdect61nSSzc4SvdDkn+audyivhJ80SF Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: > On Oct 16, 2026, at 00:07, David Hildenbrand (Arm) = wrote: >=20 > Let's fix another instance where we use a folio after dropping the = PTL, > where someone else could e.g., MADV_DONTNEED it once we drop the PTL, > making us trigger a use-after-free on the folio. >=20 > Fixes: cb6acd01e2e4 ("hugetlbfs: fix races and page leaks during = migration") > Fixes: 1c9e8def43a3 ("userfaultfd: hugetlbfs: add UFFDIO_COPY support = for shared mappings") > Cc: stable@vger.kernel.org > Reported-by: Lorenzo Stoakes (ARM) > Reviewed-by: Lorenzo Stoakes (ARM) > Signed-off-by: David Hildenbrand (Arm) Acked-by: Muchun Song Thanks.