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Commit 0845735e authored by Felix Fietkau's avatar Felix Fietkau Committed by John W. Linville
Browse files

ath9k: fix crash in ath_update_survey_stats 



If ah->curchan is uninitialized, the channel index is bogus, which leads
to invalid memory access when the cycle counters are updated.

Signed-off-by: default avatarFelix Fietkau <nbd@openwrt.org>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 2d3fca18

drivers/net/wireless/ath/ath9k/main.c

+3 −0
Original line number Diff line number Diff line
@@ -182,6 +182,9 @@ static void ath_update_survey_stats(struct ath_softc *sc) 
	struct ath_cycle_counters *cc = &common->cc_survey;

	unsigned int div = common->clockrate * 1000;



	if (!ah->curchan)

		return;



	if (ah->power_mode == ATH9K_PM_AWAKE)

		ath_hw_cycle_counters_update(common);