Larry Finger Larry.Finger@lwfinger.net writes:
On 6/21/21 5:40 AM, Pkshih wrote:
-----Original Message----- From: Larry Finger [mailto:larry.finger@gmail.com] On Behalf Of Larry Finger Sent: Monday, June 21, 2021 3:41 AM To: kvalo@codeaurora.org Cc: linux-wireless@vger.kernel.org; Larry Finger; Stable Subject: [PATCH v2] rtw88: Fix some memory leaks
There are memory leaks of skb's from routines rtw_fw_c2h_cmd_rx_irqsafe() and rtw_coex_info_response(), both arising from C2H operations. There are no leaks from the buffers sent to mac80211.
Signed-off-by: Larry Finger Larry.Finger@lwfinger.net Cc: Stable stable@vger.kernel.org
v2 - add the missinf changelog.
drivers/net/wireless/realtek/rtw88/coex.c | 4 +++- drivers/net/wireless/realtek/rtw88/fw.c | 2 ++ 2 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/realtek/rtw88/coex.c b/drivers/net/wireless/realtek/rtw88/coex.c index cedbf3825848..e81bf5070183 100644 --- a/drivers/net/wireless/realtek/rtw88/coex.c +++ b/drivers/net/wireless/realtek/rtw88/coex.c @@ -591,8 +591,10 @@ void rtw_coex_info_response(struct rtw_dev *rtwdev, struct sk_buff *skb) struct rtw_coex *coex = &rtwdev->coex; u8 *payload = get_payload_from_coex_resp(skb);
- if (payload[0] != COEX_RESP_ACK_BY_WL_FW)
if (payload[0] != COEX_RESP_ACK_BY_WL_FW) {
dev_kfree_skb_any(skb);return;
}
skb_queue_tail(&coex->queue, skb); wake_up(&coex->wait);
diff --git a/drivers/net/wireless/realtek/rtw88/fw.c b/drivers/net/wireless/realtek/rtw88/fw.c index 797b08b2a494..43525ad8543f 100644 --- a/drivers/net/wireless/realtek/rtw88/fw.c +++ b/drivers/net/wireless/realtek/rtw88/fw.c @@ -231,9 +231,11 @@ void rtw_fw_c2h_cmd_rx_irqsafe(struct rtw_dev *rtwdev, u32 pkt_offset, switch (c2h->id) { case C2H_BT_MP_INFO: rtw_coex_info_response(rtwdev, skb);
dev_kfree_skb_any(skb);The rtw_coex_info_response() puts skb into a skb_queue, so we can't free it here. Instead, we should free it after we dequeue and do thing. So, we send another patch: https://lore.kernel.org/linux-wireless/20210621103023.41928-1-pkshih@realtek...
I hope this isn't confusing you.
No, it is not confusing. T=You fixed some leaks the I did not know existed.
Kalle: Take P-K's patch and discard mine.
Will do, thank you for clear instructions :)