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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 <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>
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@ -388,7 +388,8 @@ ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
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bss = ieee80211_bss_info_update(sdata->local, rx_status,
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mgmt, skb->len, &elems,
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freq, beacon);
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ieee80211_rx_bss_put(sdata->local, bss);
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if (bss)
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ieee80211_rx_bss_put(sdata->local, bss);
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dev_kfree_skb(skb);
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return RX_QUEUED;
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