PWN-Hunter/android_kernel_xiaomi_sdm845
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ath9k: fix null pointer dereference in ani monitor code

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In 'ath9k_ani_reset' the 'ahp->ah_curani' will be initialized only
if 'DO_ANI(ah)' true. In 'ath9k_hw_ani_monitor' we are using
'ahp->ah_curani' unconditionally, and it will cause a NULL pointer
dereference on AR9100.

Changes-licensed-under: ISC

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: Imre Kaloz <kaloz@openwrt.org>
Tested-by: Pavel Roskin <proski@gnu.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Gabor Juhos 2009-01-14 20:17:11 +01:00 committed by John W. Linville
parent 1975ef2039
commit 9950688263
1 changed files with 3 additions and 3 deletions
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6
drivers/net/wireless/ath9k/ani.c
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@ -551,6 +551,9 @@ void ath9k_hw_ani_monitor(struct ath_hal *ah,
struct ar5416AniState *aniState;
int32_t listenTime;
if (!DO_ANI(ah))
return;
aniState = ahp->ah_curani;
ahp->ah_stats.ast_nodestats = *stats;
@ -610,9 +613,6 @@ void ath9k_hw_ani_monitor(struct ath_hal *ah,
aniState->cckPhyErrCount = cckPhyErrCnt;
}
if (!DO_ANI(ah))
return;
if (aniState->listenTime > 5 * ahp->ah_aniPeriod) {
if (aniState->ofdmPhyErrCount <= aniState->listenTime *
aniState->ofdmTrigLow / 1000 &&