From: Kangjie Lu <kjlu@umn.edu>
To: kjlu@umn.edu
Cc: pakki001@umn.edu, Ping-Ke Shih <pkshih@realtek.com>,
Kalle Valo <kvalo@codeaurora.org>,
"David S. Miller" <davem@davemloft.net>,
linux-wireless@vger.kernel.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH] net: rtlwifi: fix a potential NULL pointer dereference
Date: Tue, 12 Mar 2019 02:56:33 -0500 [thread overview]
Message-ID: <20190312075633.573-1-kjlu@umn.edu> (raw)
In case alloc_workqueue fails, the fix reports the error and
returns to avoid NULL pointer dereference.
Signed-off-by: Kangjie Lu <kjlu@umn.edu>
---
drivers/net/wireless/realtek/rtlwifi/base.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/net/wireless/realtek/rtlwifi/base.c b/drivers/net/wireless/realtek/rtlwifi/base.c
index 217d2a7a43c7..ac746c322554 100644
--- a/drivers/net/wireless/realtek/rtlwifi/base.c
+++ b/drivers/net/wireless/realtek/rtlwifi/base.c
@@ -448,6 +448,11 @@ static void _rtl_init_deferred_work(struct ieee80211_hw *hw)
/* <2> work queue */
rtlpriv->works.hw = hw;
rtlpriv->works.rtl_wq = alloc_workqueue("%s", 0, 0, rtlpriv->cfg->name);
+ if (unlikely(!rtlpriv->works.rtl_wq)) {
+ pr_err("Failed to allocate work queue\n");
+ return;
+ }
+
INIT_DELAYED_WORK(&rtlpriv->works.watchdog_wq,
(void *)rtl_watchdog_wq_callback);
INIT_DELAYED_WORK(&rtlpriv->works.ips_nic_off_wq,
--
2.17.1
next reply other threads:[~2019-03-12 7:56 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-12 7:56 Kangjie Lu [this message]
2019-03-23 3:59 ` [PATCH] net: rtlwifi: fix a potential NULL pointer dereference Kangjie Lu
2019-03-23 6:40 ` Kalle Valo
2019-04-04 10:25 ` [PATCH] " Kalle Valo
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