b43: Dereference of wl->current_dev must be protected by wl->mutex
Put all access to wl->current_dev under protection of the mutex.
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Cc: Larry Finger <larry.finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/b43/main.c b/drivers/net/wireless/b43/main.c
index 1c93b4f..9568ab1 100644
--- a/drivers/net/wireless/b43/main.c
+++ b/drivers/net/wireless/b43/main.c
@@ -2810,18 +2810,25 @@
struct ieee80211_key_conf *key)
{
struct b43_wl *wl = hw_to_b43_wl(hw);
- struct b43_wldev *dev = wl->current_dev;
+ struct b43_wldev *dev;
unsigned long flags;
u8 algorithm;
u8 index;
- int err = -EINVAL;
+ int err;
DECLARE_MAC_BUF(mac);
if (modparam_nohwcrypt)
return -ENOSPC; /* User disabled HW-crypto */
- if (!dev)
- return -ENODEV;
+ mutex_lock(&wl->mutex);
+ spin_lock_irqsave(&wl->irq_lock, flags);
+
+ dev = wl->current_dev;
+ err = -ENODEV;
+ if (!dev || b43_status(dev) < B43_STAT_INITIALIZED)
+ goto out_unlock;
+
+ err = -EINVAL;
switch (key->alg) {
case ALG_WEP:
if (key->keylen == 5)
@@ -2837,20 +2844,11 @@
break;
default:
B43_WARN_ON(1);
- goto out;
- }
-
- index = (u8) (key->keyidx);
- if (index > 3)
- goto out;
-
- mutex_lock(&wl->mutex);
- spin_lock_irqsave(&wl->irq_lock, flags);
-
- if (b43_status(dev) < B43_STAT_INITIALIZED) {
- err = -ENODEV;
goto out_unlock;
}
+ index = (u8) (key->keyidx);
+ if (index > 3)
+ goto out_unlock;
switch (cmd) {
case SET_KEY: