From patchwork Tue Oct 27 13:50:21 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 290119 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=-12.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, 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 538C5C55179 for ; Tue, 27 Oct 2020 14:12:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0FF2F22264 for ; Tue, 27 Oct 2020 14:12:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603807924; bh=W4SVHfnlniV+OzCG2/5tioMg3s7Sslnwjj8C4Q635yc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=cR00yb+MrzGVYQ5JNCQYhI7Og3dmz+870C88QiF2Z2PcGZdMmRtgBjaCOvVyj7nbb mw0tXoWh3YLlJQBI0PMMlBHTkjZoYL4IGvq3yF064EWQEOeUcZJRhxzwc3TSF2r7G1 S25ymrfnhjYihqFtEtL6s7fen7Pcwa3kzSl/ruL8= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756214AbgJ0OMB (ORCPT ); Tue, 27 Oct 2020 10:12:01 -0400 Received: from mail.kernel.org ([198.145.29.99]:56216 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754856AbgJ0OHZ (ORCPT ); Tue, 27 Oct 2020 10:07:25 -0400 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (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 BEAEC2072D; Tue, 27 Oct 2020 14:07:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603807645; bh=W4SVHfnlniV+OzCG2/5tioMg3s7Sslnwjj8C4Q635yc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fgmXOk8Y7LRqTQcJzWh2o6VwIN+qNz9qG/x/aEJc8w7zW0DYXLXxVtFaLRRkOcuY9 7Lh9BtxxJdVQAMU2IhT/FyGyUdWfnRcnS9b0s4AB9L64ewgEIYDBQ7yAV8ccKe5fdb ZFezzrJeyGM/cauIPRlRSM8UYGJ0YetxInSRTYnQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Chris Chiu , Kalle Valo , Sasha Levin Subject: [PATCH 4.9 127/139] rtl8xxxu: prevent potential memory leak Date: Tue, 27 Oct 2020 14:50:21 +0100 Message-Id: <20201027134908.177231508@linuxfoundation.org> X-Mailer: git-send-email 2.29.1 In-Reply-To: <20201027134902.130312227@linuxfoundation.org> References: <20201027134902.130312227@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@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: /*