Commit 5a5ee76e authored by Dan Carpenter's avatar Dan Carpenter Committed by John W. Linville

iwmc3200wifi: add some more range checks

My previous patch added a check to get_key() but missed a couple
other places which need range checks.

The problem here is that wifi drivers have different numbers of keys.
The lower levels assume that they can have up to 4 default keys and
2 management keys but this driver only has the default keys so we
could go past the end of the ->keys[] array.
Signed-off-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
Acked-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent ec3cbb9c
......@@ -165,11 +165,15 @@ static int iwm_cfg80211_add_key(struct wiphy *wiphy, struct net_device *ndev,
struct key_params *params)
{
struct iwm_priv *iwm = ndev_to_iwm(ndev);
struct iwm_key *key = &iwm->keys[key_index];
struct iwm_key *key;
int ret;
IWM_DBG_WEXT(iwm, DBG, "Adding key for %pM\n", mac_addr);
if (key_index >= IWM_NUM_KEYS)
return -ENOENT;
key = &iwm->keys[key_index];
memset(key, 0, sizeof(struct iwm_key));
ret = iwm_key_init(key, key_index, mac_addr, params);
if (ret < 0) {
......@@ -214,8 +218,12 @@ static int iwm_cfg80211_del_key(struct wiphy *wiphy, struct net_device *ndev,
u8 key_index, bool pairwise, const u8 *mac_addr)
{
struct iwm_priv *iwm = ndev_to_iwm(ndev);
struct iwm_key *key = &iwm->keys[key_index];
struct iwm_key *key;
if (key_index >= IWM_NUM_KEYS)
return -ENOENT;
key = &iwm->keys[key_index];
if (!iwm->keys[key_index].key_len) {
IWM_DBG_WEXT(iwm, DBG, "Key %d not used\n", key_index);
return 0;
......@@ -236,6 +244,9 @@ static int iwm_cfg80211_set_default_key(struct wiphy *wiphy,
IWM_DBG_WEXT(iwm, DBG, "Default key index is: %d\n", key_index);
if (key_index >= IWM_NUM_KEYS)
return -ENOENT;
if (!iwm->keys[key_index].key_len) {
IWM_ERR(iwm, "Key %d not used\n", key_index);
return -EINVAL;
......
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