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wifi: mac80211: fix check for unusable RX result

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[ Upstream commit 583058542f46e3e2b0c536316fbd641f62d91dc6 ]

If we just check "result & RX_DROP_UNUSABLE", this really only works
by accident, because SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE got to
have the value 1, and SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR is 2.

Fix this to really check the entire subsys mask for the value, so it
doesn't matter what the subsystem value is.

Fixes: 7f4e09700b ("wifi: mac80211: report all unusable beacon frames")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Johannes Berg 2023-09-25 17:24:39 +02:00 • committed by Greg Kroah-Hartman
parent d412d0ef30
commit 2fa71edb85
2 changed files with 4 additions and 1 deletions
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3
net/mac80211/drop.h
View file

@ -53,4 +53,7 @@ enum mac80211_drop_reason {
#undef DEF
};
#define RX_RES_IS_UNUSABLE(result) \
(((__force u32)(result) & SKB_DROP_REASON_SUBSYS_MASK) == ___RX_DROP_UNUSABLE)
#endif /* MAC80211_DROP_H */

2
net/mac80211/rx.c
View file

@ -2112,7 +2112,7 @@ ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx)
/* either the frame has been decrypted or will be dropped */
status->flag |= RX_FLAG_DECRYPTED;
if (unlikely(ieee80211_is_beacon(fc) && (result & RX_DROP_UNUSABLE) &&
if (unlikely(ieee80211_is_beacon(fc) && RX_RES_IS_UNUSABLE(result) &&
rx->sdata->dev))
cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev,
skb->data, skb->len);