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authorChunho Lee <handera@gmail.com>2017-07-07 17:03:14 -0700
committerJohannes Berg <johannes.berg@intel.com>2017-09-05 11:28:51 +0200
commit89e9bfc4ee859ad2a477f10aa2d5c37377242296 (patch)
tree53abe24ac82c6644314bd9de17d76969b8ce623b /net/mac80211/iface.c
parentb44eebea181a36378bea8f27e7f9b4175bfad683 (diff)
downloadlinux-89e9bfc4ee859ad2a477f10aa2d5c37377242296.tar.bz2
mac80211: Fix null pointer dereference with iTXQ support
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>
Diffstat (limited to 'net/mac80211/iface.c')
-rw-r--r--net/mac80211/iface.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index 44399322f356..f75029abf728 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -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;