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mac80211: Fix scan RX processing oops

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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 <jouni.malinen@atheros.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Acked-by: Benoit Papillault <benoit.papillault@free.fr>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Jouni Malinen 2008-10-11 03:29:55 +03:00 committed by John W. Linville
parent c25bab54fe
commit d048e503a2
1 changed files with 2 additions and 1 deletions
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3
net/mac80211/scan.c
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@ -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;