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=-13.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,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 155D9C433DF for ; Sun, 18 Oct 2020 19:27:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DC08D2227F for ; Sun, 18 Oct 2020 19:27:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603049258; bh=W4SVHfnlniV+OzCG2/5tioMg3s7Sslnwjj8C4Q635yc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=OpWeFecIdvictHmuN4D5pOzUqzuQz2bEZcaEgvvez3NisjxoKbPHl8dFjLk5xr8XY DiCpLKOMhXuPth/VPcRq+Urr+xkQ1ge9CYHn9DOnK9XUGXfztur4NeZHCTXm7roOyX Ndf2hF57CS5Thl0x8PCJx/p8jaWdK8USILIFlqyE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732140AbgJRT1g (ORCPT ); Sun, 18 Oct 2020 15:27:36 -0400 Received: from mail.kernel.org ([198.145.29.99]:42972 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731997AbgJRT1R (ORCPT ); Sun, 18 Oct 2020 15:27:17 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 7ADE2222E7; Sun, 18 Oct 2020 19:27:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603049237; bh=W4SVHfnlniV+OzCG2/5tioMg3s7Sslnwjj8C4Q635yc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=vz+CXmEOVvgdGV7hklOlKqsJeVbRhfOPH6+tPO2DUQe+50fH31QhoXJXZ1htCnuOU FU3E12gbp5UjcSbAO6OVyx690G5NQ3Yt2a1ATKdNn8E24t+EfFSKVUl9CDgbZNAE61 XF1noV56HWRWiF1WipaEcek1/coDHDCk9rRVolH0= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Chris Chiu , Kalle Valo , Sasha Levin , linux-wireless@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH AUTOSEL 4.9 34/41] rtl8xxxu: prevent potential memory leak Date: Sun, 18 Oct 2020 15:26:28 -0400 Message-Id: <20201018192635.4056198-34-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20201018192635.4056198-1-sashal@kernel.org> References: <20201018192635.4056198-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Chris Chiu [ Upstream commit 86279456a4d47782398d3cb8193f78f672e36cac ] Free the skb if usb_submit_urb fails on rx_urb. And free the urb no matter usb_submit_urb succeeds or not in rtl8xxxu_submit_int_urb. Signed-off-by: Chris Chiu Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20200906040424.22022-1-chiu@endlessm.com Signed-off-by: Sasha Levin --- drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c index 18d5984b78dab..e73613b9f2f59 100644 --- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c +++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c @@ -5422,7 +5422,6 @@ static int rtl8xxxu_submit_int_urb(struct ieee80211_hw *hw) ret = usb_submit_urb(urb, GFP_KERNEL); if (ret) { usb_unanchor_urb(urb); - usb_free_urb(urb); goto error; } @@ -5431,6 +5430,7 @@ static int rtl8xxxu_submit_int_urb(struct ieee80211_hw *hw) rtl8xxxu_write32(priv, REG_USB_HIMR, val32); error: + usb_free_urb(urb); return ret; } @@ -5756,6 +5756,7 @@ static int rtl8xxxu_start(struct ieee80211_hw *hw) struct rtl8xxxu_priv *priv = hw->priv; struct rtl8xxxu_rx_urb *rx_urb; struct rtl8xxxu_tx_urb *tx_urb; + struct sk_buff *skb; unsigned long flags; int ret, i; @@ -5806,6 +5807,13 @@ static int rtl8xxxu_start(struct ieee80211_hw *hw) rx_urb->hw = hw; ret = rtl8xxxu_submit_rx_urb(priv, rx_urb); + if (ret) { + if (ret != -ENOMEM) { + skb = (struct sk_buff *)rx_urb->urb.context; + dev_kfree_skb(skb); + } + rtl8xxxu_queue_rx_urb(priv, rx_urb); + } } exit: /* -- 2.25.1