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[PATCH] rtw88: fix use after free in rtw_hw_scan_update_probe_req()

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This code needs to use skb_queue_walk_safe() instead of skb_queue_walk()
because it frees the list iterator.

Fixes: d95984b5580d ("rtw88: fix memory overrun and memory leak during hw_scan")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
---
 drivers/net/wireless/realtek/rtw88/fw.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/realtek/rtw88/fw.c b/drivers/net/wireless/realtek/rtw88/fw.c
index ce9535cce723..2de0bb67bac6 100644
--- a/drivers/net/wireless/realtek/rtw88/fw.c
+++ b/drivers/net/wireless/realtek/rtw88/fw.c
@@ -1864,7 +1864,7 @@ static int rtw_hw_scan_update_probe_req(struct rtw_dev *rtwdev,
 {
 	struct cfg80211_scan_request *req = rtwvif->scan_req;
 	struct sk_buff_head list;
-	struct sk_buff *skb;
+	struct sk_buff *skb, *tmp;
 	u8 num = req->n_ssids, i, bands = 0;
 	int ret;
 
@@ -1889,7 +1889,7 @@ static int rtw_hw_scan_update_probe_req(struct rtw_dev *rtwdev,
 	return _rtw_hw_scan_update_probe_req(rtwdev, num * bands, &list);
 
 out:
-	skb_queue_walk(&list, skb)
+	skb_queue_walk_safe(&list, skb, tmp)
 		kfree_skb(skb);
 
 	return ret;
-- 
2.20.1




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