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Message-Id: <20190312053107.5790-1-kjlu@umn.edu>
Date: Tue, 12 Mar 2019 00:31:07 -0500
From: Kangjie Lu <kjlu@....edu>
To: kjlu@....edu
Cc: pakki001@....edu, Amitkumar Karwar <amitkarwar@...il.com>,
Nishant Sarmukadam <nishants@...vell.com>,
Ganapathi Bhat <gbhat@...vell.com>,
Xinming Hu <huxinming820@...il.com>,
Kalle Valo <kvalo@...eaurora.org>,
"David S. Miller" <davem@...emloft.net>,
linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH v2] net: mwifiex: fix a NULL pointer dereference
In case dev_alloc_skb fails, the fix returns -ENOMEM to avoid
NULL pointer dereference.
Signed-off-by: Kangjie Lu <kjlu@....edu>
---
drivers/net/wireless/marvell/mwifiex/cmdevt.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/net/wireless/marvell/mwifiex/cmdevt.c b/drivers/net/wireless/marvell/mwifiex/cmdevt.c
index 60db2b969e20..8c35441fd9b7 100644
--- a/drivers/net/wireless/marvell/mwifiex/cmdevt.c
+++ b/drivers/net/wireless/marvell/mwifiex/cmdevt.c
@@ -341,6 +341,12 @@ static int mwifiex_dnld_sleep_confirm_cmd(struct mwifiex_adapter *adapter)
sleep_cfm_tmp =
dev_alloc_skb(sizeof(struct mwifiex_opt_sleep_confirm)
+ MWIFIEX_TYPE_LEN);
+ if (!sleep_cfm_tmp) {
+ mwifiex_dbg(adapter, ERROR,
+ "SLEEP_CFM: dev_alloc_skb failed\n");
+ return -ENOMEM;
+ }
+
skb_put(sleep_cfm_tmp, sizeof(struct mwifiex_opt_sleep_confirm)
+ MWIFIEX_TYPE_LEN);
put_unaligned_le32(MWIFIEX_USB_TYPE_CMD, sleep_cfm_tmp->data);
--
2.17.1
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