diff options
| author | Michael Buesch <mb@bu3sch.de> | 2007-10-28 15:59:58 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-01-28 15:03:30 -0800 |
| commit | c6dfc9a8ec236957eea3a1cf4613e90c45e1475b (patch) | |
| tree | 148e52e8f3680a7edcbef895106433d7d1997e20 /drivers | |
| parent | 0c1d379d2ee19b1a20904c3609440c061673f53c (diff) | |
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/wireless/b43/main.c | 26 |
1 files changed, 12 insertions, 14 deletions
diff --git a/drivers/net/wireless/b43/main.c b/drivers/net/wireless/b43/main.c index 1c93b4f4bfe..9568ab17fe7 100644 --- a/drivers/net/wireless/b43/main.c +++ b/drivers/net/wireless/b43/main.c @@ -2810,18 +2810,25 @@ static int b43_dev_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, 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 @@ static int b43_dev_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, break; default: B43_WARN_ON(1); - goto out; + goto out_unlock; } - 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; - } switch (cmd) { case SET_KEY: |