From: Kangjie Lu <kjlu@umn.edu>
To: kjlu@umn.edu
Cc: pakki001@umn.edu, Solomon Peachy <pizza@shaftnet.org>,
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: cw1200: fix a NULL pointer dereference
Date: Tue, 12 Mar 2019 03:05:02 -0500 [thread overview]
Message-ID: <20190312080502.2953-1-kjlu@umn.edu> (raw)
In case create_singlethread_workqueue fails, the fix free the
hardware and returns NULL to avoid NULL pointer dereference.
Signed-off-by: Kangjie Lu <kjlu@umn.edu>
---
drivers/net/wireless/st/cw1200/main.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/net/wireless/st/cw1200/main.c b/drivers/net/wireless/st/cw1200/main.c
index 90dc979f260b..c1608f0bf6d0 100644
--- a/drivers/net/wireless/st/cw1200/main.c
+++ b/drivers/net/wireless/st/cw1200/main.c
@@ -345,6 +345,11 @@ static struct ieee80211_hw *cw1200_init_common(const u8 *macaddr,
mutex_init(&priv->wsm_cmd_mux);
mutex_init(&priv->conf_mutex);
priv->workqueue = create_singlethread_workqueue("cw1200_wq");
+ if (!priv->workqueue) {
+ ieee80211_free_hw(hw);
+ return NULL;
+ }
+
sema_init(&priv->scan.lock, 1);
INIT_WORK(&priv->scan.work, cw1200_scan_work);
INIT_DELAYED_WORK(&priv->scan.probe_work, cw1200_probe_work);
--
2.17.1
next reply other threads:[~2019-03-12 8:05 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-12 8:05 Kangjie Lu [this message]
2019-04-25 16:40 ` Kalle Valo
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