From: Johannes Berg <johannes@sipsolutions.net>
To: John Linville <linville@tuxdriver.com>
Cc: Jouni Malinen <j@w1.fi>, linux-wireless <linux-wireless@vger.kernel.org>
Subject: [PATCH] mac80211_hwsim: fix use after free
Date: Mon, 13 Jul 2009 13:25:58 +0200 [thread overview]
Message-ID: <1247484358.4166.4.camel@johannes.local> (raw)
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>
---
drivers/net/wireless/mac80211_hwsim.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- wireless-testing.orig/drivers/net/wireless/mac80211_hwsim.c 2009-07-13 13:21:18.000000000 +0200
+++ wireless-testing/drivers/net/wireless/mac80211_hwsim.c 2009-07-13 13:21:42.000000000 +0200
@@ -790,7 +790,7 @@ static const struct ieee80211_ops mac802
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);
@@ -799,7 +799,7 @@ 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);
reply other threads:[~2009-07-13 11:26 UTC|newest]
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