From d048e503a2b01e771ee87921c24d89d7ec3f0c2f Mon Sep 17 00:00:00 2001 From: Jouni Malinen Date: Sat, 11 Oct 2008 03:29:55 +0300 Subject: [PATCH] mac80211: Fix scan RX processing oops ieee80211_bss_info_update() can return NULL. Verify that this is not the case before calling ieee802111_rx_bss_put() which would trigger an oops in interrupt context in atomic_dec_and_lock(). Signed-off-by: Jouni Malinen Acked-by: Johannes Berg Acked-by: Benoit Papillault Signed-off-by: John W. Linville --- net/mac80211/scan.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c index 8e6685e7ae85..416bb41099f3 100644 --- a/net/mac80211/scan.c +++ b/net/mac80211/scan.c @@ -388,7 +388,8 @@ ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, bss = ieee80211_bss_info_update(sdata->local, rx_status, mgmt, skb->len, &elems, freq, beacon); - ieee80211_rx_bss_put(sdata->local, bss); + if (bss) + ieee80211_rx_bss_put(sdata->local, bss); dev_kfree_skb(skb); return RX_QUEUED; -- 2.20.1