From 86baf712295a00d664da8566186b67041c89b15b Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Sat, 27 Feb 2010 09:12:34 +0300 Subject: [PATCH] zd1211rw: fix potential array underflow The first chunk fixes a debugging assert to print a warning about array underflows. The second chunk corrects a potential array underflow. I also removed an assert in the second chunk because it can no longer happen. Signed-off-by: Dan Carpenter Acked-by: Benoit Papillault Signed-off-by: John W. Linville --- drivers/net/wireless/zd1211rw/zd_mac.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) diff --git a/drivers/net/wireless/zd1211rw/zd_mac.c b/drivers/net/wireless/zd1211rw/zd_mac.c index 2d555cc..e240996 100644 --- a/drivers/net/wireless/zd1211rw/zd_mac.c +++ b/drivers/net/wireless/zd1211rw/zd_mac.c @@ -350,7 +350,7 @@ static void zd_mac_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb, first_idx = info->status.rates[0].idx; ZD_ASSERT(0<=first_idx && first_idxcount); + ZD_ASSERT(1 <= retry && retry <= retries->count); info->status.rates[0].idx = retries->rate[0]; info->status.rates[0].count = 1; // (retry > 1 ? 2 : 1); @@ -360,7 +360,7 @@ static void zd_mac_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb, info->status.rates[i].count = 1; // ((i==retry-1) && success ? 1:2); } for (; istatus.rates[i].idx = retries->rate[retry-1]; + info->status.rates[i].idx = retries->rate[retry - 1]; info->status.rates[i].count = 1; // (success ? 1:2); } if (istatus.rates[0].idx; ZD_ASSERT(0<=first_idx && first_idx retries->count) { + if (retry <= 0 || retry > retries->count) continue; - } - ZD_ASSERT(0<=retry && retry<=retries->count); - final_idx = retries->rate[retry-1]; + final_idx = retries->rate[retry - 1]; final_rate = zd_rates[final_idx].hw_value; if (final_rate != tx_status->rate) { -- 2.7.4