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=-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 B7BBDC433E0 for ; Fri, 19 Jun 2020 14:56:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8F8FE2158C for ; Fri, 19 Jun 2020 14:56:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592578592; bh=dRzrmPTneQJ2RejTL0DG0atWQiNUcoX1ztdDbR2Xwcg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=i/qR+8n9HkZHr2xb/v0l7AXUOP2ik163keLStJud0cjwy/mRfXVPW/Z/mEbbnVUBD Ty9ZaCvW9Kry2WHldh+1Ne8xtnNLZz2+xcvW6WYKJDJQnhiPGqTy50m1ZVsc9oZQjW nXGUf2fD6TF4jppYWh9zg8q6hp1Pt85jYeWu0WWs= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390078AbgFSO4a (ORCPT ); Fri, 19 Jun 2020 10:56:30 -0400 Received: from mail.kernel.org ([198.145.29.99]:51458 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390045AbgFSO42 (ORCPT ); Fri, 19 Jun 2020 10:56:28 -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 E435F217D9; Fri, 19 Jun 2020 14:56:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592578588; bh=dRzrmPTneQJ2RejTL0DG0atWQiNUcoX1ztdDbR2Xwcg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Bw98dxZAlR+9sSpXYESvqlzM2T27Ia1Fh40BWB3x+2ItUsWo+SVopxZXhDqN0ktLH 4doUE2/sFhwvdpgnEIzgms3D1XptQqvrgqbvjXd8WtOfOaGeNWHsKwUBVUmQ/Dl5pV EE2G7L006fcPwfrAmu7eSnLR5rCs3BIJB/agje7Q= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Qiujun Huang , Kalle Valo , syzbot+b1c61e5f11be5782f192@syzkaller.appspotmail.com Subject: [PATCH 4.19 079/267] ath9k: Fix use-after-free Write in ath9k_htc_rx_msg Date: Fri, 19 Jun 2020 16:31:04 +0200 Message-Id: <20200619141652.678916802@linuxfoundation.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200619141648.840376470@linuxfoundation.org> References: <20200619141648.840376470@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 From: Qiujun Huang commit e4ff08a4d727146bb6717a39a8d399d834654345 upstream. Write out of slab bounds. We should check epid. The case reported by syzbot: https://lore.kernel.org/linux-usb/0000000000006ac55b05a1c05d72@google.com BUG: KASAN: use-after-free in htc_process_conn_rsp drivers/net/wireless/ath/ath9k/htc_hst.c:131 [inline] BUG: KASAN: use-after-free in ath9k_htc_rx_msg+0xa25/0xaf0 drivers/net/wireless/ath/ath9k/htc_hst.c:443 Write of size 2 at addr ffff8881cea291f0 by task swapper/1/0 Call Trace: htc_process_conn_rsp drivers/net/wireless/ath/ath9k/htc_hst.c:131 [inline] ath9k_htc_rx_msg+0xa25/0xaf0 drivers/net/wireless/ath/ath9k/htc_hst.c:443 ath9k_hif_usb_reg_in_cb+0x1ba/0x630 drivers/net/wireless/ath/ath9k/hif_usb.c:718 __usb_hcd_giveback_urb+0x29a/0x550 drivers/usb/core/hcd.c:1650 usb_hcd_giveback_urb+0x368/0x420 drivers/usb/core/hcd.c:1716 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+b1c61e5f11be5782f192@syzkaller.appspotmail.com Signed-off-by: Qiujun Huang Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20200404041838.10426-4-hqjagain@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/net/wireless/ath/ath9k/htc_hst.c | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/net/wireless/ath/ath9k/htc_hst.c +++ b/drivers/net/wireless/ath/ath9k/htc_hst.c @@ -113,6 +113,9 @@ static void htc_process_conn_rsp(struct if (svc_rspmsg->status == HTC_SERVICE_SUCCESS) { epid = svc_rspmsg->endpoint_id; + if (epid < 0 || epid >= ENDPOINT_MAX) + return; + service_id = be16_to_cpu(svc_rspmsg->service_id); max_msglen = be16_to_cpu(svc_rspmsg->max_msg_len); endpoint = &target->endpoint[epid];