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rtl8xxxu: prevent potential memory leak 

Free the skb if usb_submit_urb fails on rx_urb. And free the urb
no matter usb_submit_urb succeeds or not in rtl8xxxu_submit_int_urb.

Signed-off-by: Chris Chiu <chiu@endlessm.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200906040424.22022-1-chiu@endlessm.com
This commit is contained in:
Chris Chiu 2020-09-06 12:04:24 +08:00 committed by Kalle Valo
parent 587231ee81
commit 86279456a4
1 changed files with 9 additions and 1 deletions
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10
drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
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@ -5795,7 +5795,6 @@ static int rtl8xxxu_submit_int_urb(struct ieee80211_hw *hw)
ret = usb_submit_urb(urb, GFP_KERNEL);
if (ret) {
usb_unanchor_urb(urb);
usb_free_urb(urb);
goto error;
}
@ -5804,6 +5803,7 @@ static int rtl8xxxu_submit_int_urb(struct ieee80211_hw *hw)
rtl8xxxu_write32(priv, REG_USB_HIMR, val32);
error:
usb_free_urb(urb);
return ret;
}
@ -6318,6 +6318,7 @@ static int rtl8xxxu_start(struct ieee80211_hw *hw)
struct rtl8xxxu_priv *priv = hw->priv;
struct rtl8xxxu_rx_urb *rx_urb;
struct rtl8xxxu_tx_urb *tx_urb;
struct sk_buff *skb;
unsigned long flags;
int ret, i;
@ -6368,6 +6369,13 @@ static int rtl8xxxu_start(struct ieee80211_hw *hw)
rx_urb->hw = hw;
ret = rtl8xxxu_submit_rx_urb(priv, rx_urb);
if (ret) {
if (ret != -ENOMEM) {
skb = (struct sk_buff *)rx_urb->urb.context;
dev_kfree_skb(skb);
}
rtl8xxxu_queue_rx_urb(priv, rx_urb);
}
}
schedule_delayed_work(&priv->ra_watchdog, 2 * HZ);