| Message ID | 20220203082532.GA25151@kili |
|---|---|
| State | New |
| Headers | show |
| Series | [v2] rtw88: fix use after free in rtw_hw_scan_update_probe_req() | expand |
Dan Carpenter <dan.carpenter@oracle.com> wrote: > 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@oracle.com> > Acked-by: Ping-Ke Shih <pkshih@realtek.com> Patch applied to wireless-next.git, thanks. a954f29aea5d rtw88: fix use after free in rtw_hw_scan_update_probe_req()
diff --git a/drivers/net/wireless/realtek/rtw88/fw.c b/drivers/net/wireless/realtek/rtw88/fw.c index ce9535cce723..4c8e5ea5d069 100644 --- a/drivers/net/wireless/realtek/rtw88/fw.c +++ b/drivers/net/wireless/realtek/rtw88/fw.c @@ -1853,7 +1853,7 @@ static int _rtw_hw_scan_update_probe_req(struct rtw_dev *rtwdev, u8 num_probes, rtwdev->scan_info.probe_pg_size = page_offset; out: kfree(buf); - skb_queue_walk(probe_req_list, skb) + skb_queue_walk_safe(probe_req_list, skb, tmp) kfree_skb(skb); return ret; @@ -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;
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@oracle.com> --- v2: Fix a similar issue in _rtw_hw_scan_update_probe_req() as pointed out by Ping-Ke Shih. drivers/net/wireless/realtek/rtw88/fw.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)