* [PATCH] ath9k: fix crash in ath_update_survey_stats
@ 2010-10-20 13:59 Felix Fietkau
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From: Felix Fietkau @ 2010-10-20 13:59 UTC (permalink / raw)
To: linux-wireless; +Cc: John W. Linville, Luis R. Rodriguez
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: Felix Fietkau <nbd@openwrt.org>
---
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -183,6 +183,9 @@ static void ath_update_survey_stats(stru
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);
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2010-10-20 13:59 [PATCH] ath9k: fix crash in ath_update_survey_stats Felix Fietkau
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