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,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 40CE4C2BC73 for ; Wed, 4 Dec 2019 17:57:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 03C0220675 for ; Wed, 4 Dec 2019 17:57:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1575482277; bh=94Hv4Ms5a+mG/S8NzCllVzvp0s/I1gaMseaY+uS86uI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=q3xZmrv0nKbcvqUtAhB1N4n5NL/u+xSE2DFAtlV676D2+5oNfiutUmkP3h48Wd4Va UZoIiCcE7F1moxJxYGR+PjnJRBKr3WGSHd64EbH87Ozb1idruHFQD4beQOaPtAyoNy aDSv3lbK+3bXlNFLKdhh6cgd/5CN8PUJbKASJjdU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728471AbfLDR54 (ORCPT ); Wed, 4 Dec 2019 12:57:56 -0500 Received: from mail.kernel.org ([198.145.29.99]:59400 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728431AbfLDR5x (ORCPT ); Wed, 4 Dec 2019 12:57:53 -0500 Received: from localhost (unknown [217.68.49.72]) (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 AE7B22084B; Wed, 4 Dec 2019 17:57:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1575482273; bh=94Hv4Ms5a+mG/S8NzCllVzvp0s/I1gaMseaY+uS86uI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UB8hlB5bYnhocPc+FuiGmOxpVsszCMhO7rlbMbtxnQNrEXMKEav+aszwNJ8gOky3K 6Szqb6Ylqpo9IoVOKt0HfWaNieKXEhhPrw5mlQXG8jnOgtTezj5EzUPwANkzrB3HZC R3MZgUL3LFVnDQjbF546IZm3pkrKNGdwlFf5ww9c= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Pan Bian , Larry Finger , Kalle Valo , Sasha Levin Subject: [PATCH 4.4 21/92] rtl818x: fix potential use after free Date: Wed, 4 Dec 2019 18:49:21 +0100 Message-Id: <20191204174331.107963668@linuxfoundation.org> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20191204174327.215426506@linuxfoundation.org> References: <20191204174327.215426506@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: Pan Bian [ Upstream commit afbb1947db94eacc5a13302eee88a9772fb78935 ] entry is released via usb_put_urb just after calling usb_submit_urb. However, entry is used if the submission fails, resulting in a use after free bug. The patch fixes this. Signed-off-by: Pan Bian ACKed-by: Larry Finger Signed-off-by: Kalle Valo Signed-off-by: Sasha Levin --- drivers/net/wireless/realtek/rtl818x/rtl8187/dev.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/realtek/rtl818x/rtl8187/dev.c b/drivers/net/wireless/realtek/rtl818x/rtl8187/dev.c index b3691712df610..60e77eaa4ce94 100644 --- a/drivers/net/wireless/realtek/rtl818x/rtl8187/dev.c +++ b/drivers/net/wireless/realtek/rtl818x/rtl8187/dev.c @@ -446,12 +446,13 @@ static int rtl8187_init_urbs(struct ieee80211_hw *dev) skb_queue_tail(&priv->rx_queue, skb); usb_anchor_urb(entry, &priv->anchored); ret = usb_submit_urb(entry, GFP_KERNEL); - usb_put_urb(entry); if (ret) { skb_unlink(skb, &priv->rx_queue); usb_unanchor_urb(entry); + usb_put_urb(entry); goto err; } + usb_put_urb(entry); } return ret; -- 2.20.1