From patchwork Fri Jun 19 14:31:49 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 223723 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=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, 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 60E6CC433DF for ; Fri, 19 Jun 2020 16:37:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 36FC420809 for ; Fri, 19 Jun 2020 16:37:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592584624; bh=8oejlaATOj9Raif8m1V5LLxQXxMid/UqLoirf+WNyLI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=I7tLBi/0w/4nCN/l0Uui/qAvOlYrxhcYETgY+qLZCPzhjvCUnpVlmYMTV/YBCnEYu HUsA1bkKxiVmpL5TdT2M8plAABRXquCy6JjnADO+Eltt6otLqjSAx70dvgZjzAOY6+ 4Tq7BOHeWRv9oJ7yRY9xXKg2P0o9tO6ijoA7yMhA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391836AbgFSQhC (ORCPT ); Fri, 19 Jun 2020 12:37:02 -0400 Received: from mail.kernel.org ([198.145.29.99]:41254 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389133AbgFSOss (ORCPT ); Fri, 19 Jun 2020 10:48:48 -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 636842083B; Fri, 19 Jun 2020 14:48:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592578128; bh=8oejlaATOj9Raif8m1V5LLxQXxMid/UqLoirf+WNyLI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=QiP1tWQ08Yi5x6+195azxAqfqQKnXSQD82Gfk6m3xqC2mxmiRZe+8bwmENSPstAu3 vK2Cg1k38LlKbC3lODVofKnheBuX1eWVN8w1sGhIdl396KH7xEz98lUnChBpd/qXK9 RhBImnaObaJZ4WgJ4ykLGrzN6/Lt0tU3nOYDnwY8= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Qiujun Huang , Kalle Valo , syzbot+d403396d4df67ad0bd5f@syzkaller.appspotmail.com Subject: [PATCH 4.14 064/190] ath9x: Fix stack-out-of-bounds Write in ath9k_hif_usb_rx_cb Date: Fri, 19 Jun 2020 16:31:49 +0200 Message-Id: <20200619141636.775828504@linuxfoundation.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200619141633.446429600@linuxfoundation.org> References: <20200619141633.446429600@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Qiujun Huang commit 19d6c375d671ce9949a864fb9a03e19f5487b4d3 upstream. Add barrier to accessing the stack array skb_pool. The case reported by syzbot: https://lore.kernel.org/linux-usb/0000000000003d7c1505a2168418@google.com BUG: KASAN: stack-out-of-bounds in ath9k_hif_usb_rx_stream drivers/net/wireless/ath/ath9k/hif_usb.c:626 [inline] BUG: KASAN: stack-out-of-bounds in ath9k_hif_usb_rx_cb+0xdf6/0xf70 drivers/net/wireless/ath/ath9k/hif_usb.c:666 Write of size 8 at addr ffff8881db309a28 by task swapper/1/0 Call Trace: ath9k_hif_usb_rx_stream drivers/net/wireless/ath/ath9k/hif_usb.c:626 [inline] ath9k_hif_usb_rx_cb+0xdf6/0xf70 drivers/net/wireless/ath/ath9k/hif_usb.c:666 __usb_hcd_giveback_urb+0x1f2/0x470 drivers/usb/core/hcd.c:1648 usb_hcd_giveback_urb+0x368/0x420 drivers/usb/core/hcd.c:1713 dummy_timer+0x1258/0x32ae drivers/usb/gadget/udc/dummy_hcd.c:1966 call_timer_fn+0x195/0x6f0 kernel/time/timer.c:1404 expire_timers kernel/time/timer.c:1449 [inline] __run_timers kernel/time/timer.c:1773 [inline] __run_timers kernel/time/timer.c:1740 [inline] run_timer_softirq+0x5f9/0x1500 kernel/time/timer.c:1786 Reported-and-tested-by: syzbot+d403396d4df67ad0bd5f@syzkaller.appspotmail.com Signed-off-by: Qiujun Huang Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20200404041838.10426-5-hqjagain@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/net/wireless/ath/ath9k/hif_usb.c | 5 +++++ 1 file changed, 5 insertions(+) --- a/drivers/net/wireless/ath/ath9k/hif_usb.c +++ b/drivers/net/wireless/ath/ath9k/hif_usb.c @@ -610,6 +610,11 @@ static void ath9k_hif_usb_rx_stream(stru hif_dev->remain_skb = nskb; spin_unlock(&hif_dev->rx_lock); } else { + if (pool_index == MAX_PKT_NUM_IN_TRANSFER) { + dev_err(&hif_dev->udev->dev, + "ath9k_htc: over RX MAX_PKT_NUM\n"); + goto err; + } nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC); if (!nskb) { dev_err(&hif_dev->udev->dev,