From: Dan Carpenter Date: Thu, 24 Aug 2017 10:08:32 +0000 (+0300) Subject: staging: rtlwifi: check for array overflow X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=dc33bd4309d2e51950904e8d8f1d333a429c3371;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git staging: rtlwifi: check for array overflow Smatch is distrustful of the "capab" value and marks it as user controlled. I think it actually comes from the firmware? Anyway, I looked at other drivers and they added a bounds check and it seems like a harmless thing to have so I have added it here as well. Signed-off-by: Dan Carpenter Acked-by: Larry Finger Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/rtlwifi/base.c b/drivers/staging/rtlwifi/base.c index b81f0a943eb4..9a045c7d020c 100644 --- a/drivers/staging/rtlwifi/base.c +++ b/drivers/staging/rtlwifi/base.c @@ -1414,6 +1414,10 @@ bool rtl_action_proc(struct ieee80211_hw *hw, struct sk_buff *skb, u8 is_tx) le16_to_cpu(mgmt->u.action.u.addba_req.capab); tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2; + if (tid >= MAX_TID_COUNT) { + rcu_read_unlock(); + return true; + } tid_data = &sta_entry->tids[tid]; if (tid_data->agg.rx_agg_state == RTL_RX_AGG_START)