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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 F2C82C2BB55 for ; Thu, 16 Apr 2020 13:45:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C4A4F208E4 for ; Thu, 16 Apr 2020 13:45:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587044715; bh=9i7MVs50P0S/a+o/Z93nJnSOvsTU0wpyZFIkHsuO7Uo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=TCBoClEksPKgwXYu5QBV7hh/S6deZz6WPMcIPDn4QuTyA2PTjPiyOkFzo+a7N5rK7 +itnOb3suHt4OXc1W+PeliAn9yyKC3WV30lQ8Lxa9PJBZgEbMfibV4Txt0WnNfat+v LYqjncn+jPV/ixuTN3qxiHlb4qBXo0jfCSNJIYmc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2898491AbgDPNpN (ORCPT ); Thu, 16 Apr 2020 09:45:13 -0400 Received: from mail.kernel.org ([198.145.29.99]:46010 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2896946AbgDPNeb (ORCPT ); Thu, 16 Apr 2020 09:34:31 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 4277420732; Thu, 16 Apr 2020 13:34:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587044069; bh=9i7MVs50P0S/a+o/Z93nJnSOvsTU0wpyZFIkHsuO7Uo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jMXdQ2Wpa5ItjoYpetimfeVMYstYgh/GhN2yiLQYLM+mF1lVtse3vCTXhEincrxdR Cl8eIjZIgf1oPh3a43lpS1mB6F2ThUCFnvTEry2YUucjL2eKFN+O3s54x79TxpI/sN BK/Jyht/mtMrkFfixfWQU6efl8wDY8H3M6dc9nkc= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Christoph Hellwig , "Alexey Dobriyan (SK hynix)" , Jens Axboe , Sasha Levin Subject: [PATCH 5.5 067/257] block, zoned: fix integer overflow with BLKRESETZONE et al Date: Thu, 16 Apr 2020 15:21:58 +0200 Message-Id: <20200416131334.339476715@linuxfoundation.org> X-Mailer: git-send-email 2.26.1 In-Reply-To: <20200416131325.891903893@linuxfoundation.org> References: <20200416131325.891903893@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Alexey Dobriyan [ Upstream commit 11bde986002c0af67eb92d73321d06baefae7128 ] Check for overflow in addition before checking for end-of-block-device. Steps to reproduce: #define _GNU_SOURCE 1 #include #include #include #include typedef unsigned long long __u64; struct blk_zone_range { __u64 sector; __u64 nr_sectors; }; #define BLKRESETZONE _IOW(0x12, 131, struct blk_zone_range) int main(void) { int fd = open("/dev/nullb0", O_RDWR|O_DIRECT); struct blk_zone_range zr = {4096, 0xfffffffffffff000ULL}; ioctl(fd, BLKRESETZONE, &zr); return 0; } BUG: KASAN: null-ptr-deref in submit_bio_wait+0x74/0xe0 Write of size 8 at addr 0000000000000040 by task a.out/1590 CPU: 8 PID: 1590 Comm: a.out Not tainted 5.6.0-rc1-00019-g359c92c02bfa #2 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS ?-20190711_202441-buildvm-armv7-10.arm.fedoraproject.org-2.fc31 04/01/2014 Call Trace: dump_stack+0x76/0xa0 __kasan_report.cold+0x5/0x3e kasan_report+0xe/0x20 submit_bio_wait+0x74/0xe0 blkdev_zone_mgmt+0x26f/0x2a0 blkdev_zone_mgmt_ioctl+0x14b/0x1b0 blkdev_ioctl+0xb28/0xe60 block_ioctl+0x69/0x80 ksys_ioctl+0x3af/0xa50 Reviewed-by: Christoph Hellwig Signed-off-by: Alexey Dobriyan (SK hynix) Signed-off-by: Jens Axboe Signed-off-by: Sasha Levin --- block/blk-zoned.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/block/blk-zoned.c b/block/blk-zoned.c index d00fcfd71dfea..eb27e80e9075c 100644 --- a/block/blk-zoned.c +++ b/block/blk-zoned.c @@ -173,7 +173,7 @@ int blkdev_zone_mgmt(struct block_device *bdev, enum req_opf op, if (!op_is_zone_mgmt(op)) return -EOPNOTSUPP; - if (!nr_sectors || end_sector > capacity) + if (end_sector <= sector || end_sector > capacity) /* Out of range */ return -EINVAL; -- 2.20.1