From: Lior Cohen <[email protected]> Suspicious RCU usage observed while calling the cfg80211_sta_opmode_change_notify() during rx_handlers path. The issue occurred due to illegal blocking while in RCU read-side critical section. The blocking caused by an attempt to alloc skb with the GFP_KERNEL flag, which eventually call the might_sleep().
Signed-off-by: Lior Cohen <[email protected]> Signed-off-by: Luca Coelho <[email protected]> --- net/mac80211/rx.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c index 3bd3b5769797..a69ecfb212ed 100644 --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -3063,7 +3063,7 @@ ieee80211_rx_h_action(struct ieee80211_rx_data *rx) cfg80211_sta_opmode_change_notify(sdata->dev, rx->sta->addr, &sta_opmode, - GFP_KERNEL); + GFP_ATOMIC); goto handled; } case WLAN_HT_ACTION_NOTIFY_CHANWIDTH: { @@ -3100,7 +3100,7 @@ ieee80211_rx_h_action(struct ieee80211_rx_data *rx) cfg80211_sta_opmode_change_notify(sdata->dev, rx->sta->addr, &sta_opmode, - GFP_KERNEL); + GFP_ATOMIC); goto handled; } default: -- 2.19.2
