From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1E9A2C433E7 for ; Fri, 16 Oct 2020 18:09:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BFF58208E4 for ; Fri, 16 Oct 2020 18:09:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390785AbgJPSJN (ORCPT ); Fri, 16 Oct 2020 14:09:13 -0400 Received: from mail-wm1-f65.google.com ([209.85.128.65]:39397 "EHLO mail-wm1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390770AbgJPSJN (ORCPT ); Fri, 16 Oct 2020 14:09:13 -0400 Received: by mail-wm1-f65.google.com with SMTP id d3so3879030wma.4; Fri, 16 Oct 2020 11:09:11 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=pO0jw4bUW44xwUriD8J9vbmSKEotBZ3xMEfz+Pxr2R0=; b=QXdv2MFSgVAIZ77Ex7CEywu65M+M7zFncF9WPZ98ea/M0LyrQcJBYAL9yPKeoyI7Tn +yMOjOjMh++SAatEBJReO6k2NV2hhBOyte8S9+Sx/OxV9wXiAB9ws6quUPlnSo7mafJI FUJ8xY3kzCYkM322C+XRjus+Rkk3v/fGyqIm224BEQ4ijmBLsrwDl0ZMSlC/Bq4Xyizb +REK7pqNShxdANV505JQPteO0R/niZovCi8AD5GFE4d0kk1ZEPKa0VIdaIc+AYlkmC4+ RTSIDpPZl7TC5lIX7dRplKDdVlDx5HKYFumB5YDkQOGhkbZMvzbbOshZYOC9DrY0CMd4 6+qw== X-Gm-Message-State: AOAM533cudKq8dVDmZXY8iZZIFlbfZYwnmUcIuOM+bMZsK/nyt6cvalh AbWlnrmZY5vg8XVomNb/GiCFAgjimyi7YbBx X-Google-Smtp-Source: ABdhPJx29M2wTIJKBHQqVqWl4YJ2nL9Q5MT8VjwCzweTlH/m2dpg2YKFNDYb3pAU/2yTt0NcOw720w== X-Received: by 2002:a7b:c92c:: with SMTP id h12mr5284146wml.134.1602871750470; Fri, 16 Oct 2020 11:09:10 -0700 (PDT) Received: from msft-t490s.teknoraver.net (net-2-36-134-112.cust.vodafonedsl.it. [2.36.134.112]) by smtp.gmail.com with ESMTPSA id x1sm4369260wrl.41.2020.10.16.11.09.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 16 Oct 2020 11:09:09 -0700 (PDT) From: Matteo Croce To: linux-kernel@vger.kernel.org Cc: Guenter Roeck , Petr Mladek , Arnd Bergmann , Mike Rapoport , Kees Cook , Pavel Tatashin , Robin Holt , Fabian Frederick , stable@vger.kernel.org Subject: [PATCH 0/2] fix parsing of reboot= cmdline Date: Fri, 16 Oct 2020 20:09:05 +0200 Message-Id: <20201016180907.171957-1-mcroce@linux.microsoft.com> X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Matteo Croce The parsing of the reboot= cmdline has two major errors: - a missing bound check can crash the system on reboot - parsing of the cpu number only works if specified last Fix both, along with a small code refactor. Matteo Croce (2): reboot: fix overflow parsing reboot cpu number reboot: fix parsing of reboot cpu number kernel/reboot.c | 24 +++++++++++++----------- 1 file changed, 13 insertions(+), 11 deletions(-) -- 2.26.2