@@ -3070,8 +3070,10 @@ int mwifiex_del_virtual_intf(struct wiphy *wiphy, struct wireless_dev *wdev)
mwifiex_stop_net_dev_queue(priv->netdev, adapter);
- skb_queue_walk_safe(&priv->bypass_txq, skb, tmp)
+ skb_queue_walk_safe(&priv->bypass_txq, skb, tmp) {
+ skb_unlink(skb, &priv->bypass_txq);
mwifiex_write_data_complete(priv->adapter, skb, 0, -1);
+ }
if (netif_carrier_ok(priv->netdev))
netif_carrier_off(priv->netdev);
@@ -503,8 +503,10 @@ mwifiex_wmm_del_pkts_in_ralist_node(struct mwifiex_private *priv,
struct mwifiex_adapter *adapter = priv->adapter;
struct sk_buff *skb, *tmp;
- skb_queue_walk_safe(&ra_list->skb_head, skb, tmp)
+ skb_queue_walk_safe(&ra_list->skb_head, skb, tmp) {
+ skb_unlink(skb, &ra_list->skb_head);
mwifiex_write_data_complete(adapter, skb, 0, -1);
+ }
}
/*
@@ -600,11 +602,15 @@ mwifiex_clean_txrx(struct mwifiex_private *priv)
priv->adapter->if_ops.clean_pcie_ring(priv->adapter);
spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
- skb_queue_walk_safe(&priv->tdls_txq, skb, tmp)
+ skb_queue_walk_safe(&priv->tdls_txq, skb, tmp) {
+ skb_unlink(skb, &priv->tdls_txq);
mwifiex_write_data_complete(priv->adapter, skb, 0, -1);
+ }
- skb_queue_walk_safe(&priv->bypass_txq, skb, tmp)
+ skb_queue_walk_safe(&priv->bypass_txq, skb, tmp) {
+ skb_unlink(skb, &priv->bypass_txq);
mwifiex_write_data_complete(priv->adapter, skb, 0, -1);
+ }
atomic_set(&priv->adapter->bypass_tx_pending, 0);
idr_for_each(&priv->ack_status_frames, mwifiex_free_ack_frame, NULL);
At couple of places in cleanup path, we are just going through the skb queue and freeing them without unlinking. This leads to a crash when other thread tries to do skb_dequeue() and use already freed node. The problem is freed by unlinking skb before freeing it. Signed-off-by: Amitkumar Karwar <akarwar@marvell.com> --- drivers/net/wireless/marvell/mwifiex/cfg80211.c | 4 +++- drivers/net/wireless/marvell/mwifiex/wmm.c | 12 +++++++++--- 2 files changed, 12 insertions(+), 4 deletions(-)