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* [PATCH] ath9k: hif_usb: fix memory leak in ath9k_hif_usb_firmware_cb
@ 2021-07-09  8:43 Dongliang Mu
  2021-07-23 10:12 ` Dongliang Mu
                   ` (2 more replies)
  0 siblings, 3 replies; 5+ messages in thread
From: Dongliang Mu @ 2021-07-09  8:43 UTC (permalink / raw)
  To: ath9k-devel, Kalle Valo, David S. Miller, Jakub Kicinski, Brooke Basile
  Cc: Dongliang Mu, syzbot+6692c72009680f7c4eb2, linux-wireless,
	netdev, linux-kernel

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


^ permalink raw reply	[flat|nested] 5+ messages in thread

end of thread, other threads:[~2021-07-27 12:26 UTC | newest]

Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-07-09  8:43 [PATCH] ath9k: hif_usb: fix memory leak in ath9k_hif_usb_firmware_cb Dongliang Mu
2021-07-23 10:12 ` 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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