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[2003:cb:c731:8700:3969:7786:322:9641]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-39efa4207fcsm14653794f8f.19.2025.04.22.01.47.03 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 22 Apr 2025 01:47:03 -0700 (PDT) Message-ID: <9aee6ca3-1775-40af-88b7-506a94b96fb9@redhat.com> Date: Tue, 22 Apr 2025 10:47:02 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: Patch "mm: Fix is_zero_page() usage in try_grab_page()" has been added to the 6.1-stable tree To: gregkh@linuxfoundation.org, alex.williamson@redhat.com, carnil@debian.org, gmazyland@gmail.com, linux-mm@kvack.org, sashal@kernel.org Cc: stable-commits@vger.kernel.org References: <2025042238-applaud-postnasal-ee55@gregkh> From: David Hildenbrand Autocrypt: addr=david@redhat.com; keydata= xsFNBFXLn5EBEAC+zYvAFJxCBY9Tr1xZgcESmxVNI/0ffzE/ZQOiHJl6mGkmA1R7/uUpiCjJ dBrn+lhhOYjjNefFQou6478faXE6o2AhmebqT4KiQoUQFV4R7y1KMEKoSyy8hQaK1umALTdL QZLQMzNE74ap+GDK0wnacPQFpcG1AE9RMq3aeErY5tujekBS32jfC/7AnH7I0v1v1TbbK3Gp XNeiN4QroO+5qaSr0ID2sz5jtBLRb15RMre27E1ImpaIv2Jw8NJgW0k/D1RyKCwaTsgRdwuK Kx/Y91XuSBdz0uOyU/S8kM1+ag0wvsGlpBVxRR/xw/E8M7TEwuCZQArqqTCmkG6HGcXFT0V9 PXFNNgV5jXMQRwU0O/ztJIQqsE5LsUomE//bLwzj9IVsaQpKDqW6TAPjcdBDPLHvriq7kGjt WhVhdl0qEYB8lkBEU7V2Yb+SYhmhpDrti9Fq1EsmhiHSkxJcGREoMK/63r9WLZYI3+4W2rAc UucZa4OT27U5ZISjNg3Ev0rxU5UH2/pT4wJCfxwocmqaRr6UYmrtZmND89X0KigoFD/XSeVv jwBRNjPAubK9/k5NoRrYqztM9W6sJqrH8+UWZ1Idd/DdmogJh0gNC0+N42Za9yBRURfIdKSb B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzSREYXZpZCBIaWxk ZW5icmFuZCA8ZGF2aWRAcmVkaGF0LmNvbT7CwZgEEwEIAEICGwMGCwkIBwMCBhUIAgkKCwQW AgMBAh4BAheAAhkBFiEEG9nKrXNcTDpGDfzKTd4Q9wD/g1oFAl8Ox4kFCRKpKXgACgkQTd4Q 9wD/g1oHcA//a6Tj7SBNjFNM1iNhWUo1lxAja0lpSodSnB2g4FCZ4R61SBR4l/psBL73xktp rDHrx4aSpwkRP6Epu6mLvhlfjmkRG4OynJ5HG1gfv7RJJfnUdUM1z5kdS8JBrOhMJS2c/gPf wv1TGRq2XdMPnfY2o0CxRqpcLkx4vBODvJGl2mQyJF/gPepdDfcT8/PY9BJ7FL6Hrq1gnAo4 3Iv9qV0JiT2wmZciNyYQhmA1V6dyTRiQ4YAc31zOo2IM+xisPzeSHgw3ONY/XhYvfZ9r7W1l pNQdc2G+o4Di9NPFHQQhDw3YTRR1opJaTlRDzxYxzU6ZnUUBghxt9cwUWTpfCktkMZiPSDGd KgQBjnweV2jw9UOTxjb4LXqDjmSNkjDdQUOU69jGMUXgihvo4zhYcMX8F5gWdRtMR7DzW/YE BgVcyxNkMIXoY1aYj6npHYiNQesQlqjU6azjbH70/SXKM5tNRplgW8TNprMDuntdvV9wNkFs 9TyM02V5aWxFfI42+aivc4KEw69SE9KXwC7FSf5wXzuTot97N9Phj/Z3+jx443jo2NR34XgF 89cct7wJMjOF7bBefo0fPPZQuIma0Zym71cP61OP/i11ahNye6HGKfxGCOcs5wW9kRQEk8P9 M/k2wt3mt/fCQnuP/mWutNPt95w9wSsUyATLmtNrwccz63XOwU0EVcufkQEQAOfX3n0g0fZz Bgm/S2zF/kxQKCEKP8ID+Vz8sy2GpDvveBq4H2Y34XWsT1zLJdvqPI4af4ZSMxuerWjXbVWb T6d4odQIG0fKx4F8NccDqbgHeZRNajXeeJ3R7gAzvWvQNLz4piHrO/B4tf8svmRBL0ZB5P5A 2uhdwLU3NZuK22zpNn4is87BPWF8HhY0L5fafgDMOqnf4guJVJPYNPhUFzXUbPqOKOkL8ojk CXxkOFHAbjstSK5Ca3fKquY3rdX3DNo+EL7FvAiw1mUtS+5GeYE+RMnDCsVFm/C7kY8c2d0G NWkB9pJM5+mnIoFNxy7YBcldYATVeOHoY4LyaUWNnAvFYWp08dHWfZo9WCiJMuTfgtH9tc75 7QanMVdPt6fDK8UUXIBLQ2TWr/sQKE9xtFuEmoQGlE1l6bGaDnnMLcYu+Asp3kDT0w4zYGsx 5r6XQVRH4+5N6eHZiaeYtFOujp5n+pjBaQK7wUUjDilPQ5QMzIuCL4YjVoylWiBNknvQWBXS lQCWmavOT9sttGQXdPCC5ynI+1ymZC1ORZKANLnRAb0NH/UCzcsstw2TAkFnMEbo9Zu9w7Kv AxBQXWeXhJI9XQssfrf4Gusdqx8nPEpfOqCtbbwJMATbHyqLt7/oz/5deGuwxgb65pWIzufa N7eop7uh+6bezi+rugUI+w6DABEBAAHCwXwEGAEIACYCGwwWIQQb2cqtc1xMOkYN/MpN3hD3 AP+DWgUCXw7HsgUJEqkpoQAKCRBN3hD3AP+DWrrpD/4qS3dyVRxDcDHIlmguXjC1Q5tZTwNB boaBTPHSy/Nksu0eY7x6HfQJ3xajVH32Ms6t1trDQmPx2iP5+7iDsb7OKAb5eOS8h+BEBDeq 3ecsQDv0fFJOA9ag5O3LLNk+3x3q7e0uo06XMaY7UHS341ozXUUI7wC7iKfoUTv03iO9El5f XpNMx/YrIMduZ2+nd9Di7o5+KIwlb2mAB9sTNHdMrXesX8eBL6T9b+MZJk+mZuPxKNVfEQMQ a5SxUEADIPQTPNvBewdeI80yeOCrN+Zzwy/Mrx9EPeu59Y5vSJOx/z6OUImD/GhX7Xvkt3kq Er5KTrJz3++B6SH9pum9PuoE/k+nntJkNMmQpR4MCBaV/J9gIOPGodDKnjdng+mXliF3Ptu6 3oxc2RCyGzTlxyMwuc2U5Q7KtUNTdDe8T0uE+9b8BLMVQDDfJjqY0VVqSUwImzTDLX9S4g/8 kC4HRcclk8hpyhY2jKGluZO0awwTIMgVEzmTyBphDg/Gx7dZU1Xf8HFuE+UZ5UDHDTnwgv7E th6RC9+WrhDNspZ9fJjKWRbveQgUFCpe1sa77LAw+XFrKmBHXp9ZVIe90RMe2tRL06BGiRZr jPrnvUsUUsjRoRNJjKKA/REq+sAnhkNPPZ/NNMjaZ5b8Tovi8C0tmxiCHaQYqj7G2rgnT0kt WNyWQQ== Organization: Red Hat In-Reply-To: <2025042238-applaud-postnasal-ee55@gregkh> X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: eoHm-wYWy0cUP0nnwKAnPlHD-ThBisQ5-UCRgIvcYw8_1745311625 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: E0890120012 X-Rspam-User: X-Stat-Signature: 95q3fzcqhmp9ao6p1t9rfmyuoe66js38 X-HE-Tag: 1745311627-178532 X-HE-Meta: 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 RAnoHeUc 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 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: List-Subscribe: List-Unsubscribe: On 22.04.25 10:05, gregkh@linuxfoundation.org wrote: > > This is a note to let you know that I've just added the patch titled > > mm: Fix is_zero_page() usage in try_grab_page() > > to the 6.1-stable tree which can be found at: > http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary > > The filename of the patch is: > mm-fix-is_zero_page-usage-in-try_grab_page.patch > and it can be found in the queue-6.1 subdirectory. > > If you, or anyone else, feels it should not be added to the stable tree, > please let know about it. > > > From alex.williamson@redhat.com Tue Apr 22 10:00:53 2025 > From: Alex Williamson > Date: Wed, 16 Apr 2025 14:24:39 -0600 > Subject: mm: Fix is_zero_page() usage in try_grab_page() > Cc: Alex Williamson , Salvatore Bonaccorso , Milan Broz , stable@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Sasha Levin > Message-ID: <20250416202441.3911142-1-alex.williamson@redhat.com> > > From: Alex Williamson > > The backport of upstream commit c8070b787519 ("mm: Don't pin ZERO_PAGE > in pin_user_pages()") into v6.1.130 noted below in Fixes does not > account for commit 0f0892356fa1 ("mm: allow multiple error returns in > try_grab_page()"), which changed the return value of try_grab_page() > from bool to int. Therefore returning 0, success in the upstream > version, becomes an error here. Fix the return value. > > Fixes: 476c1dfefab8 ("mm: Don't pin ZERO_PAGE in pin_user_pages()") > Link: https://lore.kernel.org/all/Z_6uhLQjJ7SSzI13@eldamar.lan > Reported-by: Salvatore Bonaccorso > Reported-by: Milan Broz > Cc: stable@vger.kernel.org > Cc: linux-kernel@vger.kernel.org > Cc: linux-mm@kvack.org > Cc: Sasha Levin > Signed-off-by: Alex Williamson > Signed-off-by: Greg Kroah-Hartman > --- > mm/gup.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > --- a/mm/gup.c > +++ b/mm/gup.c > @@ -232,7 +232,7 @@ bool __must_check try_grab_page(struct p > * and it is used in a *lot* of places. > */ > if (is_zero_page(page)) > - return 0; > + return true; > > /* > * Similar to try_grab_folio(): be sure to *also* > > > Patches currently in stable-queue which might be from alex.williamson@redhat.com are > > queue-6.1/mm-fix-is_zero_page-usage-in-try_grab_page.patch > queue-6.1/revert-pci-avoid-reset-when-disabled-via-sysfs.patch > FWIW Reviewed-by: David Hildenbrand -- Cheers, David / dhildenb