From: Vasyl Vavrychuk <vasyl.vavrychuk@xxxxxxxxxxxxxxx>
Otherwise if network manager starts configuring Wi-Fi interface
immidiatelly after getting notification of its creation, we will get
NULL pointer dereference:
BUG: unable to handle kernel NULL pointer dereference at (null)
IP: [<ffffffff95ae94c8>] hrtimer_active+0x28/0x50
...
Call Trace:
[<ffffffff95ae9997>] ? hrtimer_try_to_cancel+0x27/0x110
[<ffffffff95ae9a95>] ? hrtimer_cancel+0x15/0x20
[<ffffffffc0803bf0>] ? mac80211_hwsim_config+0x140/0x1c0 [mac80211_hwsim]
Signed-off-by: Vasyl Vavrychuk <vasyl.vavrychuk@xxxxxxxxxxxxxxx>
---
drivers/net/wireless/mac80211_hwsim.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c
index 1068757ec42e..d0e0a9f5bf98 100644
--- a/drivers/net/wireless/mac80211_hwsim.c
+++ b/drivers/net/wireless/mac80211_hwsim.c
@@ -2890,6 +2890,10 @@ static int mac80211_hwsim_new_radio(struct genl_info *info,
wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
+ tasklet_hrtimer_init(&data->beacon_timer,
+ mac80211_hwsim_beacon,
+ CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
+
err = ieee80211_register_hw(hw);
if (err < 0) {
pr_debug("mac80211_hwsim: ieee80211_register_hw failed (%d)\n",
@@ -2914,10 +2918,6 @@ static int mac80211_hwsim_new_radio(struct genl_info *info,
data->debugfs,
data, &hwsim_simulate_radar);
- tasklet_hrtimer_init(&data->beacon_timer,
- mac80211_hwsim_beacon,
- CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
-
spin_lock_bh(&hwsim_radio_lock);
err = rhashtable_insert_fast(&hwsim_radios_rht, &data->rht,
hwsim_rht_params);
--
2.19.1
