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=-3.8 required=3.0 tests=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 80010C432C3 for ; Fri, 29 Nov 2019 09:04:27 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 316A3217C3 for ; Fri, 29 Nov 2019 09:04:27 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 316A3217C3 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.cz Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id ADC4B6B0567; Fri, 29 Nov 2019 04:04:26 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id A8D1D6B0568; Fri, 29 Nov 2019 04:04:26 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 97B816B0569; Fri, 29 Nov 2019 04:04:26 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0047.hostedemail.com [216.40.44.47]) by kanga.kvack.org (Postfix) with ESMTP id 7DCC46B0567 for ; Fri, 29 Nov 2019 04:04:26 -0500 (EST) Received: from smtpin03.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with SMTP id 3002B8249980 for ; Fri, 29 Nov 2019 09:04:26 +0000 (UTC) X-FDA: 76208728932.03.play09_26adb1c660e00 X-HE-Tag: play09_26adb1c660e00 X-Filterd-Recvd-Size: 1260 Received: from mx1.suse.de (mx2.suse.de [195.135.220.15]) by imf46.hostedemail.com (Postfix) with ESMTP for ; Fri, 29 Nov 2019 09:04:25 +0000 (UTC) X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id B913DB269; Fri, 29 Nov 2019 09:04:23 +0000 (UTC) From: Vlastimil Babka To: stable@vger.kernel.org Cc: Ben Hutchings , Matthew Wilcox , Ajay Kaher , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Vlastimil Babka Subject: [PATCH STABLE ONLY] add missing page refcount overflow checks Date: Fri, 29 Nov 2019 10:03:48 +0100 Message-Id: <20191129090351.3507-1-vbabka@suse.cz> X-Mailer: git-send-email 2.24.0 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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: This collection of patches add the missing overflow checks in arch-specif= ic gup.c variants for x86 and s390. Those were missed in backport of 8fde12c= a79af ("mm: prevent get_user_pages() from overflowing page refcount") as mainli= ne had a single gup.c implementation at that point. See individual patches f= or details. Vlastimil --=20 2.24.0