From fa8f136fe9a8fbdcb11a1db94f30146cae6d8777 Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Tue, 22 Jul 2014 21:00:26 +0200 Subject: mac80211: fix crash on getting sta info with uninitialized rate control If the expected throughput is queried before rate control has been initialized, the minstrel op for it will crash while trying to access the rate table. Check for WLAN_STA_RATE_CONTROL before attempting to use the rate control op. Reported-by: Jean-Pierre Tosoni Signed-off-by: Felix Fietkau Signed-off-by: Johannes Berg --- net/mac80211/cfg.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'net') diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index d7513a503be1..592f4b152ba8 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -472,12 +472,15 @@ static void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo) { struct ieee80211_sub_if_data *sdata = sta->sdata; struct ieee80211_local *local = sdata->local; - struct rate_control_ref *ref = local->rate_ctrl; + struct rate_control_ref *ref = NULL; struct timespec uptime; u64 packets = 0; u32 thr = 0; int i, ac; + if (test_sta_flag(sta, WLAN_STA_RATE_CONTROL)) + ref = local->rate_ctrl; + sinfo->generation = sdata->local->sta_generation; sinfo->filled = STATION_INFO_INACTIVE_TIME | -- cgit v1.2.3