From: Dongliang Mu <mudongliangabcd@gmail.com>
To: ath9k-devel@qca.qualcomm.com, Kalle Valo <kvalo@codeaurora.org>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Brooke Basile <brookebasile@gmail.com>
Cc: Dongliang Mu <mudongliangabcd@gmail.com>,
syzbot+6692c72009680f7c4eb2@syzkaller.appspotmail.com,
linux-wireless@vger.kernel.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH] ath9k: hif_usb: fix memory leak in ath9k_hif_usb_firmware_cb
Date: Fri, 9 Jul 2021 16:43:51 +0800 [thread overview]
Message-ID: <20210709084351.2087311-1-mudongliangabcd@gmail.com> (raw)
The commit 03fb92a432ea ("ath9k: hif_usb: fix race condition between
usb_get_urb() and usb_kill_anchored_urbs()") adds three usb_get_urb
in ath9k_hif_usb_dealloc_tx_urbs and usb_free_urb.
Fix this bug by adding corresponding usb_free_urb in
ath9k_hif_usb_dealloc_tx_urbs other and hif_usb_stop.
Reported-by: syzbot+6692c72009680f7c4eb2@syzkaller.appspotmail.com
Fixes: 03fb92a432ea ("ath9k: hif_usb: fix race condition between usb_get_urb() and usb_kill_anchored_urbs()")
Signed-off-by: Dongliang Mu <mudongliangabcd@gmail.com>
---
drivers/net/wireless/ath/ath9k/hif_usb.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/net/wireless/ath/ath9k/hif_usb.c b/drivers/net/wireless/ath/ath9k/hif_usb.c
index 860da13bfb6a..bda91ff3289b 100644
--- a/drivers/net/wireless/ath/ath9k/hif_usb.c
+++ b/drivers/net/wireless/ath/ath9k/hif_usb.c
@@ -457,6 +457,7 @@ static void hif_usb_stop(void *hif_handle)
usb_kill_urb(tx_buf->urb);
list_del(&tx_buf->list);
usb_free_urb(tx_buf->urb);
+ usb_free_urb(tx_buf->urb);
kfree(tx_buf->buf);
kfree(tx_buf);
spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
@@ -779,6 +780,7 @@ static void ath9k_hif_usb_dealloc_tx_urbs(struct hif_device_usb *hif_dev)
usb_kill_urb(tx_buf->urb);
list_del(&tx_buf->list);
usb_free_urb(tx_buf->urb);
+ usb_free_urb(tx_buf->urb);
kfree(tx_buf->buf);
kfree(tx_buf);
spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
@@ -797,6 +799,7 @@ static void ath9k_hif_usb_dealloc_tx_urbs(struct hif_device_usb *hif_dev)
usb_kill_urb(tx_buf->urb);
list_del(&tx_buf->list);
usb_free_urb(tx_buf->urb);
+ usb_free_urb(tx_buf->urb);
kfree(tx_buf->buf);
kfree(tx_buf);
spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
--
2.25.1
next reply other threads:[~2021-07-09 8:44 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-09 8:43 Dongliang Mu [this message]
2021-07-23 10:12 ` [PATCH] ath9k: hif_usb: fix memory leak in ath9k_hif_usb_firmware_cb Dongliang Mu
2021-07-27 6:02 ` Kalle Valo
2021-07-27 7:24 ` Julian Calaby
2021-07-27 12:26 ` Kalle Valo
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