From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EF441606A31A for ; Tue, 27 Oct 2026 00:14:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=4wKe9SsX; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=aHMDeZQe DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Reply-To:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:Date: Content-Transfer-Encoding:Content-Type:References:In-Reply-To:Cc:To:Subject: From:Message-ID:MIME-Version:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Unsubscribe-Post:List-Owner; bh=sIDxvGKxBxTe6Ad/BrR857SoVGNUjzBFHwzFN3NoBG4=; b=4wKe9SsXg1mFTZ+FIfkJJnKSmu VIMRs1XrSdXAxK23bjqwz4SOH44qbUicLf238e96GhprHYnINg45uJSBYDZF5D03BJ/Wa73XhcUin DC96c/ln6zv7O/0spCUh3XCVDQevSXsVVzg4xS8WlrJ+iFMmibUsb4mLwTj3F6jD08XlrXvF4nZX3 IiaSaHNjna0bZORdEElpF1Jf9pkR+rX9CL8Pv39Z44BGQgwpwB3QBBE5PdJgUFaklvWDt8tdF5sIq QFLYyKuCv+iD1XwRmwidyiRpph4uhjTG6Lx7i/Mx8h4s8Xi0vbHPKJ4ZrGNfN/Zq2p3DuMGsa9buI B+uGQqcA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.100.1 #2 (Red Hat Linux)) id 1xLUpl-00000003WN8-2oza; Tue, 27 Oct 2026 00:14:33 +0000 Received: from sea.source.kernel.org ([172.234.252.31]) by bombadil.infradead.org with esmtps (Exim 4.100.1 #2 (Red Hat Linux)) id 1xLUpk-00000003WMB-2cEW for kexec@lists.infradead.org; Tue, 27 Oct 2026 00:14:32 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 532FB42DD3; Tue, 27 Oct 2026 00:14:32 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 95BF31F01825; Tue, 27 Oct 2026 00:14:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793060072; bh=sIDxvGKxBxTe6Ad/BrR857SoVGNUjzBFHwzFN3NoBG4=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=aHMDeZQeFRY8wcJBOTwwUK4/rpen7T2VrODE1/egcOVqd+2GjcgESXY9m6zZ3Jdwd 94ZtGgriWZH3+zoThQUEs2TUU5ppo+QoVoyxfMDou6E0ECOftrCfB0nveCEmb8drqb XUZ9N69mbcetAVXDd0LzsJSyZlIhwbNcgwdpt6rrt8T0ZmH1PwUfpOGHYNiCKBHb9O gZzw5KwdVRNl7Rue+WWv+li+qvnss7lQ4ZokItc9fR3VWCwGm1rwpm0kdAfRRi3R16 C5BWnVOjAkMyniRDOiuRGrdv+tLcRz0sgN7/qZNoDcX74dwGHFECbwfNsvkbTBq+D9 idMDaZf52XFfA== Message-ID: From: sashiko-bot@kernel.org Subject: Re: [PATCH 46/46] fs/proc/task_mmu: refuse addresses beyond 32 bits on 32bit To: =?utf-8?b?RGF2aWQgSGlsZGVuYnJhbmQgKEFybSk=?= , "Andrew Morton" , "Johannes Weiner" , "Michal Hocko" , "Qi Zheng" , "Shakeel Butt" , "Lorenzo Stoakes" , "Kairui Song" , "Barry Song" , "Axel Rasmussen" , "Yuanchu Xie" , "Wei Xu" , "Baoquan He" , "Baolin Wang" , "Liam R. Howlett" , "Vlastimil Babka" , "Mike Rapoport" , "Suren Baghdasaryan" , "Michal Hocko" , "Kees Cook" , "Peter Zijlstra" , "Jann Horn" , "Pedro Falcato" , "Hugh Dickins" , "Pasha Tatashin" , "Pratyush Yadav" , =?utf-8?b?TWF0dGhldyBXaWxjb3ggKE9yYWNsZSk=?= , "Jan Kara" , "Zi Yan" , "Lance Yang" , "Rik van Riel" , "Harry Yoo" , "Alistair Popple" , "Nico Pache" , "Ryan Roberts" , "Dev Jain" , "Usama Arif" , "Kiryl Shutsemau" , "Matthew Brost" , "John Hubbard" , "Peter Xu" , "Will Deacon" , "Aneesh Kumar K.V" , "Nick Piggin" , "Oscar Salvador" , "Minchan Kim" , "Muchun Song" , "Xu Xin" , "Chengming Zhou" , "Chris Li" , "Kemeng Shi" , "Nhat Pham" , "Youngjun Park" , "Gregory Price" , "Joshua Hahn" , "Rakie Kim" , "Ying Huang" , "Jason Gunthorpe" Cc: kexec@lists.infradead.org, "Josef Bacik" In-Reply-To: <20261027-fixes_core-v1-46-6f74bec9a5bb@kernel.org> References: <20261027-fixes_core-v1-0-6f74bec9a5bb@kernel.org> <20261027-fixes_core-v1-46-6f74bec9a5bb@kernel.org> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Tue, 27 Oct 2026 00:14:29 +0000 X-BeenThere: kexec@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: sashiko-reviews@lists.linux.dev Sender: "kexec" X-Spam-Status: No, score=-11.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 X-Archived-By: > From: Josef Bacik >=20 > The addresses in struct pm_scan_arg are 64 bits wide. The first thing > pagemap_scan_get_args() does with them is to cast them to unsigned > long. On a 32-bit kernel the upper half is dropped without a word: > PAGEMAP_SCAN of 0x100001000-0x100002000 scans, and with > PM_SCAN_WP_MATCHING write-protects, 0x1000-0x2000, stores the result > at the lower half of vec, and reports success. >=20 > Return -EFAULT, as for other addresses outside of the address space. >=20 > This is probably not worth CCing stable. >=20 > Fix generated by an LLM and sent by Josef Bacik in private. >=20 > Fixes: 52526ca7fdb9 ("fs/proc/task_mmu: implement IOCTL to get and option= ally clear info about PTEs") > Signed-off-by: Josef Bacik > Acked-by: Lorenzo Stoakes (ARM) > Signed-off-by: David Hildenbrand (Arm) Sashiko has reviewed this patch and found no issues. --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20261027-fixes_core= -v1-0-6f74bec9a5bb@kernel.org?part=3D46