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=-10.0 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=unavailable 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 B63F2C06510 for ; Tue, 2 Jul 2019 08:07:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8F0042184C for ; Tue, 2 Jul 2019 08:07:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1562054872; bh=F0z/Qt1OUgKcq+NpAv5Pu2gellH7RLZ46sZaWd1mOUw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=uHpJUUFRvf375jKTBrjvASKULbjK1p/AMsLgTSM8y58h/RM2zub+xykO8jMXMajFr Q6QEN1YLHROJJs3m5v8hkHqH0y1Vkec7/tENa4AGIsJqOL6W2Rt9NN81rO/aI/Czph l6RnevQZPKYj2asDATomBvk37whS0peDOGLZvw2c= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728324AbfGBIHq (ORCPT ); Tue, 2 Jul 2019 04:07:46 -0400 Received: from mail.kernel.org ([198.145.29.99]:55138 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727976AbfGBIHp (ORCPT ); Tue, 2 Jul 2019 04:07:45 -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 960022183F; Tue, 2 Jul 2019 08:07:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1562054865; bh=F0z/Qt1OUgKcq+NpAv5Pu2gellH7RLZ46sZaWd1mOUw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=QLtJAUVLGFh5g4FcvRAx60T09AI6AY/qjMVxem2RZIVpLsWoJsqgR9pV3jxRwlyjd OO+dn+zgY2XOHPhFSXN3U6n61DeE1aEUZ9bHLcJYLf/hnXSQIbZEBi5fZWtqGpPpyn u4kLIcNCjJktixrCQ0UIbdjMGPvL0ByFxUaGk7Fk= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, syzbot+b68605d7fadd21510de1@syzkaller.appspotmail.com, Kristian Evensen , =?UTF-8?q?Bj=C3=B8rn=20Mork?= , "David S. Miller" , Sasha Levin Subject: [PATCH 4.19 22/72] qmi_wwan: Fix out-of-bounds read Date: Tue, 2 Jul 2019 10:01:23 +0200 Message-Id: <20190702080125.824008218@linuxfoundation.org> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190702080124.564652899@linuxfoundation.org> References: <20190702080124.564652899@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org [ Upstream commit 904d88d743b0c94092c5117955eab695df8109e8 ] The syzbot reported Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0xca/0x13e lib/dump_stack.c:113 print_address_description+0x67/0x231 mm/kasan/report.c:188 __kasan_report.cold+0x1a/0x32 mm/kasan/report.c:317 kasan_report+0xe/0x20 mm/kasan/common.c:614 qmi_wwan_probe+0x342/0x360 drivers/net/usb/qmi_wwan.c:1417 usb_probe_interface+0x305/0x7a0 drivers/usb/core/driver.c:361 really_probe+0x281/0x660 drivers/base/dd.c:509 driver_probe_device+0x104/0x210 drivers/base/dd.c:670 __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:777 bus_for_each_drv+0x15c/0x1e0 drivers/base/bus.c:454 Caused by too many confusing indirections and casts. id->driver_info is a pointer stored in a long. We want the pointer here, not the address of it. Thanks-to: Hillf Danton Reported-by: syzbot+b68605d7fadd21510de1@syzkaller.appspotmail.com Cc: Kristian Evensen Fixes: e4bf63482c30 ("qmi_wwan: Add quirk for Quectel dynamic config") Signed-off-by: Bjørn Mork Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/usb/qmi_wwan.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/usb/qmi_wwan.c b/drivers/net/usb/qmi_wwan.c index d9a6699abe59..e657d8947125 100644 --- a/drivers/net/usb/qmi_wwan.c +++ b/drivers/net/usb/qmi_wwan.c @@ -1412,7 +1412,7 @@ static int qmi_wwan_probe(struct usb_interface *intf, * different. Ignore the current interface if the number of endpoints * equals the number for the diag interface (two). */ - info = (void *)&id->driver_info; + info = (void *)id->driver_info; if (info->data & QMI_WWAN_QUIRK_QUECTEL_DYNCFG) { if (desc->bNumEndpoints == 2) -- 2.20.1