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Tue, 18 Apr 2023 14:17:36 -0700 (PDT) MIME-Version: 1.0 References: <20220203182641.824731-1-shy828301@gmail.com> <132ba4a4-3b1d-329d-1db4-f102eea2fd08@suse.cz> <9ba70a5e-4e12-0e9f-a6a4-d955bf25d0fe@redhat.com> <64ec7939-0733-7925-0ec0-d333e62c5f21@suse.cz> <5618f454-7a88-0443-59e7-df9780e9fa50@redhat.com> <67d3e5e1-57be-590d-f925-47b49442a67e@google.com> In-Reply-To: <67d3e5e1-57be-590d-f925-47b49442a67e@google.com> From: Yang Shi Date: Tue, 18 Apr 2023 14:17:24 -0700 Message-ID: Subject: Re: [v4 PATCH] fs/proc: task_mmu.c: don't read mapcount for migration entry To: David Rientjes Cc: willemb@google.com, David Hildenbrand , Vlastimil Babka , kirill.shutemov@linux.intel.com, jannh@google.com, Matthew Wilcox , Andrew Morton , linux-mm@kvack.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspam-User: X-Rspamd-Server: rspam03 X-Stat-Signature: mc1brrjtraq4hj1b9oxr1xs74xjqew4s X-Rspamd-Queue-Id: 12BFE80012 X-HE-Tag: 1681852657-872338 X-HE-Meta: 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 MnP0qhWK kHkydTi0k52/a54j9kmoxTfDatXrGTlBAHt6DXi8G0u5Afdkmt0i4kpXhu4BMRhC7iX0O+x+ZSWnAMYNMq+mdZLnAW5fWqmNCfmoPwZUzEUxdmIBwfpMIvcoxwN06szALONIAVme1mXxb4I2YplQ/XaPzhlyc9X/TV0Bi1NQAiKGUIOu8sskedKBR5dS3+cQFYV/EFaYfS5ZFggo0Safw7b2gvrQ1hyan6i6WH5bpIdCgdtfE8pn5jfOwRKwmW+GJtl7+7ge1LfynCCORMnk7X/y7xs5h7OIYsCXAVc06XoIH8mDr9cHo/muACYJWB8RaO/1mHIL/lGUMNa+OcowCQ2bM6UhyUWsZRwolVzJ6N8QSB8F00Myj86erQJCFU9D/fUiimAgkeI78dZqP5+GipsKUWfoKWlCQbYenXJRfwhuUvfmITMzA6iUlmNw1yASYe/Ywzn1QaoV9uMihOQfTiYYH/wouSXEY+syV+LsLiCthtZc= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Thu, Apr 13, 2023 at 4:58=E2=80=AFPM David Rientjes wrote: > > On Mon, 3 Apr 2023, Yang Shi wrote: > > > On Mon, Apr 3, 2023 at 12:30=E2=80=AFAM David Hildenbrand wrote: > > > > > > On 24.03.23 21:12, Yang Shi wrote: > > > > On Fri, Mar 24, 2023 at 4:25=E2=80=AFAM Vlastimil Babka wrote: > > > >> > > > >> On 3/23/23 21:45, Yang Shi wrote: > > > >>> On Thu, Mar 23, 2023 at 3:11=E2=80=AFAM Vlastimil Babka wrote: > > > >>> > > > >>> Out of curiosity, is there any public link for this CVE? Google s= earch > > > >>> can't find it. > > > >> > > > >> Only this one is live so far, AFAIK > > > >> > > > >> https://bugzilla.redhat.com/show_bug.cgi?id=3D2180936 > > > > > > > > Thank you. > > > > > > There is now > > > > > > https://access.redhat.com/security/cve/cve-2023-1582 > > > > Thank you. > > > > Hi Yang, > > commit 24d7275ce2791829953ed4e72f68277ceb2571c6 > Author: Yang Shi > Date: Fri Feb 11 16:32:26 2022 -0800 > > fs/proc: task_mmu.c: don't read mapcount for migration entry > > is backported to 5.10 stable but not to 5.4 or earlier stable trees. The > commit advertises to fix a commit from 4.5. > > Do we need stable backports for earlier trees or are they not affected? IIRC, it is needed. But I can't remember why it wasn't. Maybe just because the patch failed to apply to those trees and needs to backport the patch manually. > > Thanks!