Return-path: Received: from m12-12.163.com ([220.181.12.12]:55996 "EHLO m12-12.163.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754303AbcAMOpK (ORCPT ); Wed, 13 Jan 2016 09:45:10 -0500 From: Jia-Ju Bai To: andrea.merello@gmail.com, Larry.Finger@lwfinger.net, flamingice@sourmilk.net, kvalo@codeaurora.org Cc: linux-wireless@vger.kernel.org, netdev@vger.kernel.org, Jia-Ju Bai Subject: [PATCH] rtl818x_pci: Fix a memory leak in rtl8180_init_rx_ring Date: Wed, 13 Jan 2016 22:44:32 +0800 Message-Id: <1452696272-31229-1-git-send-email-baijiaju1990@163.com> (sfid-20160113_154532_067285_D305D695) Sender: linux-wireless-owner@vger.kernel.org List-ID: When dev_alloc_skb or pci_dma_mapping_error in rtl8180_init_rx_ring fails, the memory allocated by pci_zalloc_consistent is not freed. This patch fixes the bug by adding pci_free_consistent in error handling code. Signed-off-by: Jia-Ju Bai --- drivers/net/wireless/realtek/rtl818x/rtl8180/dev.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/net/wireless/realtek/rtl818x/rtl8180/dev.c b/drivers/net/wireless/realtek/rtl818x/rtl8180/dev.c index a43a16f..28479b1 100644 --- a/drivers/net/wireless/realtek/rtl818x/rtl8180/dev.c +++ b/drivers/net/wireless/realtek/rtl818x/rtl8180/dev.c @@ -1018,6 +1018,8 @@ static int rtl8180_init_rx_ring(struct ieee80211_hw *dev) dma_addr_t *mapping; entry = priv->rx_ring + priv->rx_ring_sz*i; if (!skb) { + pci_free_consistent(priv->pdev, priv->rx_ring_sz * 32, + priv->rx_ring, priv->rx_ring_dma); wiphy_err(dev->wiphy, "Cannot allocate RX skb\n"); return -ENOMEM; } @@ -1028,6 +1030,8 @@ static int rtl8180_init_rx_ring(struct ieee80211_hw *dev) if (pci_dma_mapping_error(priv->pdev, *mapping)) { kfree_skb(skb); + pci_free_consistent(priv->pdev, priv->rx_ring_sz * 32, + priv->rx_ring, priv->rx_ring_dma); wiphy_err(dev->wiphy, "Cannot map DMA for RX skb\n"); return -ENOMEM; } -- 1.7.9.5