package/mac80211/patches/410-ath9k-fix-null-pointer-dereference-in-ani-monitor-c.patch

   1 From ea298030ddc0089f308eec39571355aa359a1563 Mon Sep 17 00:00:00 2001
   2 From: Gabor Juhos <juhosg@openwrt.org>
   3 Date: Mon, 5 Jan 2009 11:14:14 +0100
   4 Subject: [PATCH v3 10/11] ath9k: fix null pointer dereference in ani monitor code
   5
   6 In 'ath9k_ani_reset' the 'ahp->ah_curani' will be initialized only
   7 if 'DO_ANI(ah)' true. In 'ath9k_hw_ani_monitor' we are using
   8 'ahp->ah_curani' unconditionally, and it will cause a NULL pointer
   9 dereference on AR9100.
  10
  11 Changes-licensed-under: ISC
  12
  13 Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
  14 Signed-off-by: Imre Kaloz <kaloz@openwrt.org>
  15 ---
  16  drivers/net/wireless/ath9k/ani.c |    6 +++---
  17  1 files changed, 3 insertions(+), 3 deletions(-)
  18
  19 --- a/drivers/net/wireless/ath9k/ani.c
  20 +++ b/drivers/net/wireless/ath9k/ani.c
  21 @@ -551,6 +551,9 @@ void ath9k_hw_ani_monitor(struct ath_hal
  22         struct ar5416AniState *aniState;
  23         int32_t listenTime;
  24
  25 +       if (!DO_ANI(ah))
  26 +               return;
  27 +
  28         aniState = ahp->ah_curani;
  29         ahp->ah_stats.ast_nodestats = *stats;
  30
  31 @@ -610,9 +613,6 @@ void ath9k_hw_ani_monitor(struct ath_hal
  32                 aniState->cckPhyErrCount = cckPhyErrCnt;
  33         }
  34
  35 -       if (!DO_ANI(ah))
  36 -               return;
  37 -
  38         if (aniState->listenTime > 5 * ahp->ah_aniPeriod) {
  39                 if (aniState->ofdmPhyErrCount <= aniState->listenTime *
  40                     aniState->ofdmTrigLow / 1000 &&