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mac80211_hwsim: fix race condition with sta/vif pointers 

info->control.sta and control.vif may only be dereferenced
during the drv_tx call otherwise could lead to use-after-free
bugs.

Signed-off-by: Thomas Huehn <thomas@net.t-labs.tu-berlin.de>
[reword commit message]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Thomas Huehn 2012-07-13 20:52:24 +02:00 committed by Johannes Berg
parent 7f9f78ab96
commit b0e40e72be
1 changed files with 0 additions and 5 deletions
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5
drivers/net/wireless/mac80211_hwsim.c
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@ -1540,11 +1540,6 @@ static int hwsim_tx_info_frame_received_nl(struct sk_buff *skb_2,
/* now send back TX status */
txi = IEEE80211_SKB_CB(skb);
if (txi->control.vif)
hwsim_check_magic(txi->control.vif);
if (txi->control.sta)
hwsim_check_sta_magic(txi->control.sta);
ieee80211_tx_info_clear_status(txi);
for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {