From patchwork Mon Sep 30 03:04:21 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Koichiro Den X-Patchwork-Id: 1990718 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ubuntu.com (client-ip=185.125.189.65; helo=lists.ubuntu.com; envelope-from=kernel-team-bounces@lists.ubuntu.com; receiver=patchwork.ozlabs.org) Received: from lists.ubuntu.com (lists.ubuntu.com [185.125.189.65]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4XH5Xg0TjQz1xsq for ; Mon, 30 Sep 2024 13:05:06 +1000 (AEST) Received: from localhost ([127.0.0.1] helo=lists.ubuntu.com) by lists.ubuntu.com with esmtp (Exim 4.86_2) (envelope-from ) id 1sv6iY-0007xX-RL; Mon, 30 Sep 2024 03:04:58 +0000 Received: from smtp-relay-internal-1.internal ([10.131.114.114] helo=smtp-relay-internal-1.canonical.com) by lists.ubuntu.com with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.86_2) (envelope-from ) id 1sv6iX-0007xO-SV for kernel-team@lists.ubuntu.com; Mon, 30 Sep 2024 03:04:57 +0000 Received: from mail-oa1-f71.google.com (mail-oa1-f71.google.com [209.85.160.71]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by smtp-relay-internal-1.canonical.com (Postfix) with ESMTPS id B6EC43F27D for ; Mon, 30 Sep 2024 03:04:57 +0000 (UTC) Received: by mail-oa1-f71.google.com with SMTP id 586e51a60fabf-27978aba6a3so3776293fac.0 for ; Sun, 29 Sep 2024 20:04:57 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1727665496; x=1728270296; h=content-transfer-encoding:mime-version:message-id:date:subject:to :from:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=ENCukx4UgfdLL3cnViyaiTKXMIis8fzNxNeMn6xESwk=; b=b3gMOwYRFRxMp8+TWexlhRgSlTlp8oH04Dbn4cgzFyhQptmb7mNGFpe75EvhxYqlOd kPtEupe+zPGZyReOqheJ3gfU4uL42j8eY88hhpMH2uDCsk4ohcqmokDxzqsTsTZZRm0O LHhckX5eM1rZofxIkR0rercGCUqXl0HFySYMuc5DRdlh/7bCdO6fzInGLm39jPx6BzIB gaFLjvbqxezMkqkjgV54NMhJJB4SarSupw6KQ8GtD1gb9VQebkmYJE92pLQcl9xILT8z xryJGHch0kZUequlQOWb691H8SWtUaO5CS1QlCIcc1eVq745YTlAX5bXFyaFXM1zObbk t3eQ== X-Gm-Message-State: AOJu0YzPAhZ+pdLjSQYvn4G7Vg7vBsfxNB65Ox5y9wAK8G1fvJ771y6D a2mXhhZbnDmGDsUAIvH2C9LmHOkGtLsYYkhZjykwC/ubtwLiHkKunl+/c28St6e5AUOspRwy1EM avaGBBNZwl+g71IV4v/Zio7L+MyKNDsiPi5RhX/Nx8qHjn7v0tgBruTEYm8UOmaJcNpNUWJ3sRA McKppAodQr2A== X-Received: by 2002:a05:6870:831e:b0:278:25d:d473 with SMTP id 586e51a60fabf-287109f6d35mr6350696fac.1.1727665496325; Sun, 29 Sep 2024 20:04:56 -0700 (PDT) X-Google-Smtp-Source: AGHT+IHzM9WKgR1Xb6naUgot9DPopstHxTBDakgv96XhjQIH5dU8ABPLpaF47ukRwiw8YvJlqKpUvA== X-Received: by 2002:a05:6870:831e:b0:278:25d:d473 with SMTP id 586e51a60fabf-287109f6d35mr6350686fac.1.1727665495717; Sun, 29 Sep 2024 20:04:55 -0700 (PDT) Received: from localhost.localdomain ([240f:74:7be:1:c835:dd5c:238f:3a73]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-7e6db60bfe9sm5487677a12.84.2024.09.29.20.04.54 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 29 Sep 2024 20:04:55 -0700 (PDT) From: Koichiro Den To: kernel-team@lists.ubuntu.com Subject: [SRU][F/J][PATCH v2 0/1] CVE-2024-26947 Date: Mon, 30 Sep 2024 12:04:21 +0900 Message-ID: <20240930030427.591560-1-koichiro.den@canonical.com> X-Mailer: git-send-email 2.43.0 MIME-Version: 1.0 X-BeenThere: kernel-team@lists.ubuntu.com X-Mailman-Version: 2.1.20 Precedence: list List-Id: Kernel team discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: kernel-team-bounces@lists.ubuntu.com Sender: "kernel-team" [Impact] ARM: 9359/1: flush: check if the folio is reserved for no-mapping addresses Since commit a4d5613c4dc6 ("arm: extend pfn_valid to take into account freed memory map alignment") changes the semantics of pfn_valid() to check presence of the memory map for a PFN. A valid page for an address which is reserved but not mapped by the kernel[1], the system crashed during some uio test with the following memory layout: node 0: [mem 0x00000000c0a00000-0x00000000cc8fffff] node 0: [mem 0x00000000d0000000-0x00000000da1fffff] the uio layout is：0xc0900000, 0x100000 the crash backtrace like: Unable to handle kernel paging request at virtual address bff00000 [...] CPU: 1 PID: 465 Comm: startapp.bin Tainted: G O 5.10.0 #1 Hardware name: Generic DT based system PC is at b15_flush_kern_dcache_area+0x24/0x3c LR is at __sync_icache_dcache+0x6c/0x98 [...] (b15_flush_kern_dcache_area) from (__sync_icache_dcache+0x6c/0x98) (__sync_icache_dcache) from (set_pte_at+0x28/0x54) (set_pte_at) from (remap_pfn_range+0x1a0/0x274) (remap_pfn_range) from (uio_mmap+0x184/0x1b8 [uio]) (uio_mmap [uio]) from (__mmap_region+0x264/0x5f4) (__mmap_region) from (__do_mmap_mm+0x3ec/0x440) (__do_mmap_mm) from (do_mmap+0x50/0x58) (do_mmap) from (vm_mmap_pgoff+0xfc/0x188) (vm_mmap_pgoff) from (ksys_mmap_pgoff+0xac/0xc4) (ksys_mmap_pgoff) from (ret_fast_syscall+0x0/0x5c) Code: e0801001 e2423001 e1c00003 f57ff04f (ee070f3e) ---[ end trace 09cf0734c3805d52 ]--- Kernel panic - not syncing: Fatal exception So check if PG_reserved was set to solve this issue. [1]: https://lore.kernel.org/lkml/Zbtdue57RO0QScJM@linux.ibm.com/ [Backport] Adjusted context due to missing commits: - 8b5989f33337 ("arm: implement the new page table range API") - d389a4a81155 ("mm: Add folio flag manipulation functions")] without merging them to avoid unnecessary changes to the code base. [Fix] Noble: fixed via stable Jammy: Backport - adjusted contexts, see [Backport] Focal: Backport - adjusted contexts, see [Backport] Bionic: not affected Xenial: not affected Trusty: not affected [Test case] Compile and boot tested [Where problems could occur] This fix affects __LINUX_ARM_ARCH__>=6, an issue with this fix would be visible to user via a system crash. [Notes] v2: - improve the backport descriptions in commit message trailers Yongqiang Liu (1): ARM: 9359/1: flush: check if the folio is reserved for no-mapping addresses arch/arm/mm/flush.c | 2 ++ 1 file changed, 2 insertions(+)