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mac80211: Fix null pointer dereference with iTXQ support

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This change adds null pointer check before dereferencing pointer dev on
netif_tx_start_all_queues() when an interface is added.
With iTXQ support, netif_tx_start_all_queues() is always called while
an interface is added. however, the netdev queues are not associated
and dev is null when the interface is either NL80211_IFTYPE_P2P_DEVICE
or NL80211_IFTYPE_NAN.

Signed-off-by: Chunho Lee <ch.lee@newracom.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Chunho Lee 2017-07-07 17:03:14 -07:00 committed by Johannes Berg
parent b44eebea18
commit 89e9bfc4ee
1 changed files with 2 additions and 1 deletions
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net/mac80211/iface.c
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@ -731,7 +731,8 @@ int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
local->ops->wake_tx_queue) {
/* XXX: for AP_VLAN, actually track AP queues */
netif_tx_start_all_queues(dev);
if (dev)
netif_tx_start_all_queues(dev);
} else if (dev) {
unsigned long flags;
int n_acs = IEEE80211_NUM_ACS;