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[2620:137:e000::1:20]) by mx.google.com with ESMTP id 14-20020a63050e000000b0045a73a1790asi3098517pgf.613.2022.12.23.01.31.55; Fri, 23 Dec 2022 01:32:07 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@infradead.org header.s=bombadil.20210309 header.b=nIi94Z7x; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236205AbiLWJ11 (ORCPT + 99 others); Fri, 23 Dec 2022 04:27:27 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53086 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236197AbiLWJ1U (ORCPT ); Fri, 23 Dec 2022 04:27:20 -0500 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:3::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D301E3720E; Fri, 23 Dec 2022 01:27:17 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=uj5J1LKb/4UIpagExHs49WqhLRVbYSUrTZ0b+D0WTrE=; b=nIi94Z7xg6PPdFGLsL4tc1cRkg fk8vpDY3Qb3un4xD1x2lRvrSE26lm0N2VFu2vOaxEEGO0wHPAN1Yxwhvxql+tye9eIB5BRKK8X8XV qanYlBggDmH2iPfyygKTQw+sRmJFClDwKQ2kuS5u26BxfEccIXUncjf++Bd5jYUx+wbGGQKfYdk4c 7/mdYbO9Mwpwbfp/CjA+1UI4MNSaFjOBU4i6+PdCtDeRCOcmkq8GcN830iPnmFv/pc+vl/vmUZblo TDK7c8vj1Clg2JWlevxJIVFeIehSHNSv5VExgK9skZq/Qyl4aoiTv6ZetYah0ZlvZ0ESd3tYFwVPO Judum79A==; Received: from [2001:4bb8:199:7829:8d88:c8b3:6416:2f03] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1p8eKe-005hTn-Jv; Fri, 23 Dec 2022 09:27:13 +0000 From: Christoph Hellwig To: Andy Gross , Bjorn Andersson , Konrad Dybcio , Mathieu Poirier , Andrew Morton , Uladzislau Rezki Cc: linux-arm-msm@vger.kernel.org, linux-remoteproc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, iommu@lists.linux.dev Subject: [PATCH 2/2] vmalloc: reject vmap with VM_FLUSH_RESET_PERMS Date: Fri, 23 Dec 2022 10:27:03 +0100 Message-Id: <20221223092703.61927-3-hch@lst.de> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20221223092703.61927-1-hch@lst.de> References: <20221223092703.61927-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html X-Spam-Status: No, score=-4.0 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_EF,HEADER_FROM_DIFFERENT_DOMAINS, RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_NONE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1752996697745036775?= X-GMAIL-MSGID: =?utf-8?q?1752996697745036775?= VM_FLUSH_RESET_PERMS is just for use with vmalloc as it is tied to freeing the underlying pages. Signed-off-by: Christoph Hellwig --- mm/vmalloc.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/mm/vmalloc.c b/mm/vmalloc.c index 9e30f0b3920325..88a644cde9fb12 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -2849,6 +2849,9 @@ void *vmap(struct page **pages, unsigned int count, might_sleep(); + if (WARN_ON_ONCE(flags & VM_FLUSH_RESET_PERMS)) + return NULL; + /* * Your top guard is someone else's bottom guard. Not having a top * guard compromises someone else's mappings too.