From patchwork Wed Apr 1 16:18:27 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 228350 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=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 34886C43331 for ; Wed, 1 Apr 2020 16:50:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B75F12063A for ; Wed, 1 Apr 2020 16:50:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1585759834; bh=DahiHw5H4HO3q92hreQmS6hEroRFGFzccqXJwM9Tv3A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=G3lqByKPwcZ7YTpDyUc6p/yiku81g+PjMFfnVDu9vI0MU2fUGjFa94j4y4UdHV/TJ sxyVGiKNwyiXMhMb/aKv4nlJMyOxEhX7YrXwm1163GokGZZRPjBQ2k4USypUb0GzHK yN7KnLlaQJ1G01T6W4rxfvvdnoWyi4Q9ZcRPP+k0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389246AbgDAQjs (ORCPT ); Wed, 1 Apr 2020 12:39:48 -0400 Received: from mail.kernel.org ([198.145.29.99]:39854 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389243AbgDAQjs (ORCPT ); Wed, 1 Apr 2020 12:39:48 -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 8B28D2063A; Wed, 1 Apr 2020 16:39:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1585759188; bh=DahiHw5H4HO3q92hreQmS6hEroRFGFzccqXJwM9Tv3A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=haBkFEXMYV/UQ0N4+yDp6AQL25QKukc11bN8hZ4F4aJK3zpccN2DakBMajd+8b5W7 ppYBigLfftWqXci1PkM0KfByTW83XOaCGHvS2DaqLFxiJ61xM4IjWEDUSKX1gcN3eA XOvR80mr7sLT/tgZsDTd5EeL63wO/Jnpu8EMslX0= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Qiujun Huang , syzbot+7d42d68643a35f71ac8a@syzkaller.appspotmail.com Subject: [PATCH 4.9 084/102] staging: wlan-ng: fix use-after-free Read in hfa384x_usbin_callback Date: Wed, 1 Apr 2020 18:18:27 +0200 Message-Id: <20200401161546.521375881@linuxfoundation.org> X-Mailer: git-send-email 2.26.0 In-Reply-To: <20200401161530.451355388@linuxfoundation.org> References: <20200401161530.451355388@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 1165dd73e811a07d947aee218510571f516081f6 upstream. We can't handle the case length > WLAN_DATA_MAXLEN. Because the size of rxfrm->data is WLAN_DATA_MAXLEN(2312), and we can't read more than that. Thanks-to: Hillf Danton Reported-and-tested-by: syzbot+7d42d68643a35f71ac8a@syzkaller.appspotmail.com Signed-off-by: Qiujun Huang Cc: stable Link: https://lore.kernel.org/r/20200326131850.17711-1-hqjagain@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/staging/wlan-ng/hfa384x_usb.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/staging/wlan-ng/hfa384x_usb.c +++ b/drivers/staging/wlan-ng/hfa384x_usb.c @@ -3443,6 +3443,8 @@ static void hfa384x_int_rxmonitor(struct WLAN_HDR_A4_LEN + WLAN_DATA_MAXLEN + WLAN_CRC_LEN)) { pr_debug("overlen frm: len=%zd\n", skblen - sizeof(struct p80211_caphdr)); + + return; } skb = dev_alloc_skb(skblen);