diff options
| author |   Felix Fietkau <nbd@openwrt.org> | 2010-10-20 15:59:28 +0200 |
|---|---|---|
| committer |   John W. Linville <linville@tuxdriver.com> | 2010-10-25 14:43:14 -0400 |
| commit | 0845735e2d1e4c177076d4bc2d841d9f77e95131 (patch) | |
| tree | d45bf79b448f0eef91d1803f113df9343afef820 /drivers | |
| parent | ath9k_hw: Fix divide by zero cases in paprd. (diff) | |
| download | linux-dev-0845735e2d1e4c177076d4bc2d841d9f77e95131.tar.xz linux-dev-0845735e2d1e4c177076d4bc2d841d9f77e95131.zip | |
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: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/main.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c index 3ff0e476c2b3..9679b3191975 100644 --- 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); |