diff options
| author | Amitkumar Karwar <akarwar@marvell.com> | 2016-09-28 18:18:23 +0530 |
|---|---|---|
| committer | Kalle Valo <kvalo@codeaurora.org> | 2016-11-09 03:33:25 +0200 |
| commit | c44c040300d7afd79294710313a4989683e2afb1 (patch) | |
| tree | 111821dc779464eae2887e515d496fc4992c8592 | |
| parent | 5190f2e405919cd30ba2f12c58129fb2d71cd6b6 (diff) | |
| download | op-kernel-dev-c44c040300d7afd79294710313a4989683e2afb1.zip op-kernel-dev-c44c040300d7afd79294710313a4989683e2afb1.tar.gz | |
mwifiex: Fix NULL pointer dereference in skb_dequeue()
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>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
| -rw-r--r-- | drivers/net/wireless/marvell/mwifiex/cfg80211.c | 4 | ||||
| -rw-r--r-- | drivers/net/wireless/marvell/mwifiex/wmm.c | 12 |
2 files changed, 12 insertions, 4 deletions
diff --git a/drivers/net/wireless/marvell/mwifiex/cfg80211.c b/drivers/net/wireless/marvell/mwifiex/cfg80211.c index 39ce76a..e83861f 100644 --- a/drivers/net/wireless/marvell/mwifiex/cfg80211.c +++ b/drivers/net/wireless/marvell/mwifiex/cfg80211.c @@ -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); diff --git a/drivers/net/wireless/marvell/mwifiex/wmm.c b/drivers/net/wireless/marvell/mwifiex/wmm.c index 0eb2465..dea2fe6 100644 --- a/drivers/net/wireless/marvell/mwifiex/wmm.c +++ b/drivers/net/wireless/marvell/mwifiex/wmm.c @@ -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); |
