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ath9k: fix crash in ath_update_survey_stats
author
Felix Fietkau
<nbd@openwrt.org>
Wed, 20 Oct 2010 13:59:28 +0000
(15:59 +0200)
committer
John W. Linville
<linville@tuxdriver.com>
Mon, 25 Oct 2010 18:43:14 +0000
(14:43 -0400)
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>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
drivers/net/wireless/ath/ath9k/main.c
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diff --git
a/drivers/net/wireless/ath/ath9k/main.c
b/drivers/net/wireless/ath/ath9k/main.c
index
3ff0e47
..
9679b31
100644
(file)
--- a/
drivers/net/wireless/ath/ath9k/main.c
+++ b/
drivers/net/wireless/ath/ath9k/main.c
@@
-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);