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mac80211_hwsim: fix use after free 

Once the "data" pointer is freed, we can't be iterating
to the next item in the list any more so we need to use
list_for_each_entry_safe with a temporary variable.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
wifi-calibration
Johannes Berg 2009-07-13 13:25:58 +02:00 committed by John W. Linville
parent 5d41635195
commit e603d9d824
1 changed files with 2 additions and 2 deletions
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4
drivers/net/wireless/mac80211_hwsim.c
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@ -709,7 +709,7 @@ static const struct ieee80211_ops mac80211_hwsim_ops =
static void mac80211_hwsim_free(void)
{
struct list_head tmplist, *i, *tmp;
struct mac80211_hwsim_data *data;
struct mac80211_hwsim_data *data, *tmpdata;
INIT_LIST_HEAD(&tmplist);
@ -718,7 +718,7 @@ static void mac80211_hwsim_free(void)
list_move(i, &tmplist);
spin_unlock_bh(&hwsim_radio_lock);
list_for_each_entry(data, &tmplist, list) {
list_for_each_entry_safe(data, tmpdata, &tmplist, list) {
debugfs_remove(data->debugfs_group);
debugfs_remove(data->debugfs_ps);
debugfs_remove(data->debugfs);