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authorJouni Malinen <j@w1.fi>2008-08-25 11:57:06 +0300
committerJohn W. Linville <linville@tuxdriver.com>2008-08-26 20:06:33 -0400
commit93015f0f34e81a47c4126329746ce5f364bafd11 (patch)
treea65755403354d28148f8b85627ddf0dd544c9277
parent667d8af9af775a5fea203890978037ea750816cc (diff)
mac80211: Fix debugfs file add/del for netdev
Previous version was using incorrect union structures for non-AP interfaces when adding and removing max_ratectrl_rateidx and force_unicast_rateidx entries. Depending on the vif type, this ended up in corrupting debugfs entries since the dentries inside different union structures ended up going being on top of eachother.. As the end result, debugfs files were being left behind with references to freed data (instant kernel oops on access) and directories were not removed properly when unloading mac80211 drivers. This patch fixes those issues by using only a single union structure based on the vif type. Signed-off-by: Jouni Malinen <jouni.malinen@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
-rw-r--r--net/mac80211/debugfs_netdev.c24
-rw-r--r--net/mac80211/ieee80211_i.h6
2 files changed, 18 insertions, 12 deletions
diff --git a/net/mac80211/debugfs_netdev.c b/net/mac80211/debugfs_netdev.c
index 475f89a8aee..8165df578c9 100644
--- a/net/mac80211/debugfs_netdev.c
+++ b/net/mac80211/debugfs_netdev.c
@@ -248,8 +248,8 @@ IEEE80211_IF_WFILE(min_discovery_timeout,
static void add_sta_files(struct ieee80211_sub_if_data *sdata)
{
DEBUGFS_ADD(drop_unencrypted, sta);
- DEBUGFS_ADD(force_unicast_rateidx, ap);
- DEBUGFS_ADD(max_ratectrl_rateidx, ap);
+ DEBUGFS_ADD(force_unicast_rateidx, sta);
+ DEBUGFS_ADD(max_ratectrl_rateidx, sta);
DEBUGFS_ADD(state, sta);
DEBUGFS_ADD(bssid, sta);
@@ -283,8 +283,8 @@ static void add_ap_files(struct ieee80211_sub_if_data *sdata)
static void add_wds_files(struct ieee80211_sub_if_data *sdata)
{
DEBUGFS_ADD(drop_unencrypted, wds);
- DEBUGFS_ADD(force_unicast_rateidx, ap);
- DEBUGFS_ADD(max_ratectrl_rateidx, ap);
+ DEBUGFS_ADD(force_unicast_rateidx, wds);
+ DEBUGFS_ADD(max_ratectrl_rateidx, wds);
DEBUGFS_ADD(peer, wds);
}
@@ -292,8 +292,8 @@ static void add_wds_files(struct ieee80211_sub_if_data *sdata)
static void add_vlan_files(struct ieee80211_sub_if_data *sdata)
{
DEBUGFS_ADD(drop_unencrypted, vlan);
- DEBUGFS_ADD(force_unicast_rateidx, ap);
- DEBUGFS_ADD(max_ratectrl_rateidx, ap);
+ DEBUGFS_ADD(force_unicast_rateidx, vlan);
+ DEBUGFS_ADD(max_ratectrl_rateidx, vlan);
}
static void add_monitor_files(struct ieee80211_sub_if_data *sdata)
@@ -381,8 +381,8 @@ static void add_files(struct ieee80211_sub_if_data *sdata)
static void del_sta_files(struct ieee80211_sub_if_data *sdata)
{
DEBUGFS_DEL(drop_unencrypted, sta);
- DEBUGFS_DEL(force_unicast_rateidx, ap);
- DEBUGFS_DEL(max_ratectrl_rateidx, ap);
+ DEBUGFS_DEL(force_unicast_rateidx, sta);
+ DEBUGFS_DEL(max_ratectrl_rateidx, sta);
DEBUGFS_DEL(state, sta);
DEBUGFS_DEL(bssid, sta);
@@ -416,8 +416,8 @@ static void del_ap_files(struct ieee80211_sub_if_data *sdata)
static void del_wds_files(struct ieee80211_sub_if_data *sdata)
{
DEBUGFS_DEL(drop_unencrypted, wds);
- DEBUGFS_DEL(force_unicast_rateidx, ap);
- DEBUGFS_DEL(max_ratectrl_rateidx, ap);
+ DEBUGFS_DEL(force_unicast_rateidx, wds);
+ DEBUGFS_DEL(max_ratectrl_rateidx, wds);
DEBUGFS_DEL(peer, wds);
}
@@ -425,8 +425,8 @@ static void del_wds_files(struct ieee80211_sub_if_data *sdata)
static void del_vlan_files(struct ieee80211_sub_if_data *sdata)
{
DEBUGFS_DEL(drop_unencrypted, vlan);
- DEBUGFS_DEL(force_unicast_rateidx, ap);
- DEBUGFS_DEL(max_ratectrl_rateidx, ap);
+ DEBUGFS_DEL(force_unicast_rateidx, vlan);
+ DEBUGFS_DEL(max_ratectrl_rateidx, vlan);
}
static void del_monitor_files(struct ieee80211_sub_if_data *sdata)
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index ec59345af65..586a9b49b0f 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -470,6 +470,8 @@ struct ieee80211_sub_if_data {
struct dentry *auth_transaction;
struct dentry *flags;
struct dentry *num_beacons_sta;
+ struct dentry *force_unicast_rateidx;
+ struct dentry *max_ratectrl_rateidx;
} sta;
struct {
struct dentry *drop_unencrypted;
@@ -483,9 +485,13 @@ struct ieee80211_sub_if_data {
struct {
struct dentry *drop_unencrypted;
struct dentry *peer;
+ struct dentry *force_unicast_rateidx;
+ struct dentry *max_ratectrl_rateidx;
} wds;
struct {
struct dentry *drop_unencrypted;
+ struct dentry *force_unicast_rateidx;
+ struct dentry *max_ratectrl_rateidx;
} vlan;
struct {
struct dentry *mode;