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Date: Wed, 29 May 2019 20:04:15 -0700
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Ping-Ke Shih <pkshih@...ltek.com>,
Kalle Valo <kvalo@...eaurora.org>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.1 257/405] rtlwifi: fix potential NULL pointer dereference
[ Upstream commit 60209d482b97743915883d293c8b85226d230c19 ]
In case dev_alloc_skb fails, the fix safely returns to avoid
potential NULL pointer dereference.
Signed-off-by: Ping-Ke Shih <pkshih@...ltek.com>
Signed-off-by: Kalle Valo <kvalo@...eaurora.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
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 203e7b574e845..e2e0bfbc24fe2 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 18c76990a0898..86b1b88cc4ed8 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 7c5b54b71a92f..67305ce915ec4 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 be451a6f7dbe5..33481232fad01 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 4d7fa27f55caa..aa56058af56ef 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 dc0eb692088f6..fe32d397d2875 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);
--
2.20.1
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