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authorLorenzo Bianconi <lorenzo.bianconi@redhat.com>2018-11-16 17:19:21 +0100
committerKalle Valo <kvalo@codeaurora.org>2018-12-13 16:19:56 +0200
commit7c250f4612ae97aa04500c0d0cff69bb87046e3a (patch)
tree6b6075993c567bed1b9dcb176e17769a805a5d19 /MAINTAINERS
parent1aa48f088615ebfa5e139951a0d3e7dc2c2af4ec (diff)
mt76: fix potential NULL pointer dereference in mt76_stop_tx_queues
Starting from mac80211 commit adf8ed01e4fd ("mac80211: add an optional TXQ for other PS-buffered frames") and commit 0eeb2b674f05 ("mac80211: add an option for station management TXQ") a new per-sta queue has been introduced for bufferable management frames. sta->txq[IEEE80211_NUM_TIDS] is initialized just if the driver reports the following hw flags: - IEEE80211_HW_STA_MMPDU_TXQ - IEEE80211_HW_BUFF_MMPDU_TXQ This can produce a NULL pointer dereference in mt76_stop_tx_queues since mt76 iterates on all available sta tx queues assuming they are initialized by mac80211. This issue has been spotted analyzing the code (it has not triggered any crash yet) Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
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