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=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,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 B0D9CC43381 for ; Tue, 12 Mar 2019 09:07:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 83DB42147C for ; Tue, 12 Mar 2019 09:07:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726873AbfCLJHQ (ORCPT ); Tue, 12 Mar 2019 05:07:16 -0400 Received: from rtits2.realtek.com ([211.75.126.72]:49920 "EHLO rtits2.realtek.com.tw" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726567AbfCLJHQ (ORCPT ); Tue, 12 Mar 2019 05:07:16 -0400 Authenticated-By: X-SpamFilter-By: BOX Solutions SpamTrap 5.62 with qID x2C96x5M022165, This message is accepted by code: ctloc85258 Received: from mail.realtek.com (rtitcasv01.realtek.com.tw[172.21.6.18]) by rtits2.realtek.com.tw (8.15.2/2.57/5.78) with ESMTPS id x2C96x5M022165 (version=TLSv1 cipher=AES256-SHA bits=256 verify=NOT); Tue, 12 Mar 2019 17:07:00 +0800 Received: from localhost.localdomain (172.21.69.114) by RTITCASV01.realtek.com.tw (172.21.6.18) with Microsoft SMTP Server id 14.3.408.0; Tue, 12 Mar 2019 17:06:59 +0800 From: To: CC: , , Subject: [PATCH] rtlwifi: fix potential NULL pointer dereference Date: Tue, 12 Mar 2019 17:06:48 +0800 Message-ID: <20190312090648.30750-1-pkshih@realtek.com> X-Mailer: git-send-email 2.19.1 MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-Originating-IP: [172.21.69.114] Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: Ping-Ke Shih In case dev_alloc_skb fails, the fix safely returns to avoid potential NULL pointer dereference. Signed-off-by: Ping-Ke Shih --- drivers/net/wireless/realtek/rtlwifi/rtl8188ee/fw.c | 2 ++ drivers/net/wireless/realtek/rtlwifi/rtl8192c/fw_common.c | 2 ++ drivers/net/wireless/realtek/rtlwifi/rtl8192ee/fw.c | 2 ++ drivers/net/wireless/realtek/rtlwifi/rtl8723ae/fw.c | 2 ++ drivers/net/wireless/realtek/rtlwifi/rtl8723be/fw.c | 2 ++ drivers/net/wireless/realtek/rtlwifi/rtl8821ae/fw.c | 4 ++++ 6 files changed, 14 insertions(+) diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8188ee/fw.c b/drivers/net/wireless/realtek/rtlwifi/rtl8188ee/fw.c index 203e7b574e84..e2e0bfbc24fe 100644 --- a/drivers/net/wireless/realtek/rtlwifi/rtl8188ee/fw.c +++ b/drivers/net/wireless/realtek/rtlwifi/rtl8188ee/fw.c @@ -600,6 +600,8 @@ void rtl88e_set_fw_rsvdpagepkt(struct ieee80211_hw *hw, bool b_dl_finished) u1rsvdpageloc, 3); skb = dev_alloc_skb(totalpacketlen); + if (!skb) + return; skb_put_data(skb, &reserved_page_packet, totalpacketlen); rtstatus = rtl_cmd_send_packet(hw, skb); diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8192c/fw_common.c b/drivers/net/wireless/realtek/rtlwifi/rtl8192c/fw_common.c index 18c76990a089..86b1b88cc4ed 100644 --- a/drivers/net/wireless/realtek/rtlwifi/rtl8192c/fw_common.c +++ b/drivers/net/wireless/realtek/rtlwifi/rtl8192c/fw_common.c @@ -623,6 +623,8 @@ void rtl92c_set_fw_rsvdpagepkt(struct ieee80211_hw *hw, u1rsvdpageloc, 3); skb = dev_alloc_skb(totalpacketlen); + if (!skb) + return; skb_put_data(skb, &reserved_page_packet, totalpacketlen); if (cmd_send_packet) diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8192ee/fw.c b/drivers/net/wireless/realtek/rtlwifi/rtl8192ee/fw.c index 7c5b54b71a92..67305ce915ec 100644 --- a/drivers/net/wireless/realtek/rtlwifi/rtl8192ee/fw.c +++ b/drivers/net/wireless/realtek/rtlwifi/rtl8192ee/fw.c @@ -744,6 +744,8 @@ void rtl92ee_set_fw_rsvdpagepkt(struct ieee80211_hw *hw, bool b_dl_finished) u1rsvdpageloc, 3); skb = dev_alloc_skb(totalpacketlen); + if (!skb) + return; skb_put_data(skb, &reserved_page_packet, totalpacketlen); rtstatus = rtl_cmd_send_packet(hw, skb); diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8723ae/fw.c b/drivers/net/wireless/realtek/rtlwifi/rtl8723ae/fw.c index be451a6f7dbe..33481232fad0 100644 --- a/drivers/net/wireless/realtek/rtlwifi/rtl8723ae/fw.c +++ b/drivers/net/wireless/realtek/rtlwifi/rtl8723ae/fw.c @@ -448,6 +448,8 @@ void rtl8723e_set_fw_rsvdpagepkt(struct ieee80211_hw *hw, bool b_dl_finished) u1rsvdpageloc, 3); skb = dev_alloc_skb(totalpacketlen); + if (!skb) + return; skb_put_data(skb, &reserved_page_packet, totalpacketlen); rtstatus = rtl_cmd_send_packet(hw, skb); diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8723be/fw.c b/drivers/net/wireless/realtek/rtlwifi/rtl8723be/fw.c index 4d7fa27f55ca..aa56058af56e 100644 --- a/drivers/net/wireless/realtek/rtlwifi/rtl8723be/fw.c +++ b/drivers/net/wireless/realtek/rtlwifi/rtl8723be/fw.c @@ -562,6 +562,8 @@ void rtl8723be_set_fw_rsvdpagepkt(struct ieee80211_hw *hw, u1rsvdpageloc, sizeof(u1rsvdpageloc)); skb = dev_alloc_skb(totalpacketlen); + if (!skb) + return; skb_put_data(skb, &reserved_page_packet, totalpacketlen); rtstatus = rtl_cmd_send_packet(hw, skb); diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/fw.c b/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/fw.c index dc0eb692088f..fe32d397d287 100644 --- a/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/fw.c +++ b/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/fw.c @@ -1623,6 +1623,8 @@ void rtl8812ae_set_fw_rsvdpagepkt(struct ieee80211_hw *hw, &reserved_page_packet_8812[0], totalpacketlen); skb = dev_alloc_skb(totalpacketlen); + if (!skb) + return; skb_put_data(skb, &reserved_page_packet_8812, totalpacketlen); rtstatus = rtl_cmd_send_packet(hw, skb); @@ -1759,6 +1761,8 @@ void rtl8821ae_set_fw_rsvdpagepkt(struct ieee80211_hw *hw, &reserved_page_packet_8821[0], totalpacketlen); skb = dev_alloc_skb(totalpacketlen); + if (!skb) + return; skb_put_data(skb, &reserved_page_packet_8821, totalpacketlen); rtstatus = rtl_cmd_send_packet(hw, skb); -- 2.19.1