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| author | Wey-Yi Guy <wey-yi.w.guy@intel.com> | 2012-01-06 22:16:28 +0100 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2012-01-24 20:08:35 +0100 |
| commit | 2da424b0773cea3db47e1e81db71eeebde8269d4 (patch) | |
| tree | db9be596b509f53fb0f5f8f390e01f595f1a11b4 /drivers/net/wireless/iwlwifi/iwl-agn-sta.c | |
| parent | iwlwifi: don't process the info from uCode if does not has ownership (diff) | |
| download | linux-2da424b0773cea3db47e1e81db71eeebde8269d4.tar.xz linux-2da424b0773cea3db47e1e81db71eeebde8269d4.zip | |
iwlwifi: Sanity check for sta_id
On my testing, I saw some strange behavior
[ 421.739708] iwlwifi 0000:01:00.0: ACTIVATE a non DRIVER active station id 148 addr 00:00:00:00:00:00
[ 421.739719] iwlwifi 0000:01:00.0: iwl_sta_ucode_activate Added STA id 148 addr 00:00:00:00:00:00 to uCode
not sure how it happen, but adding the sanity check to prevent memory
corruption
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-agn-sta.c')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-agn-sta.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-sta.c b/drivers/net/wireless/iwlwifi/iwl-agn-sta.c index 7353826095f1..8d4353a42568 100644 --- a/drivers/net/wireless/iwlwifi/iwl-agn-sta.c +++ b/drivers/net/wireless/iwlwifi/iwl-agn-sta.c @@ -35,9 +35,12 @@ #include "iwl-trans.h" /* priv->shrd->sta_lock must be held */ -static void iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id) +static int iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id) { - + if (sta_id >= IWLAGN_STATION_COUNT) { + IWL_ERR(priv, "invalid sta_id %u", sta_id); + return -EINVAL; + } if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) IWL_ERR(priv, "ACTIVATE a non DRIVER active station id %u " "addr %pM\n", @@ -53,6 +56,7 @@ static void iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id) IWL_DEBUG_ASSOC(priv, "Added STA id %u addr %pM to uCode\n", sta_id, priv->stations[sta_id].sta.sta.addr); } + return 0; } static int iwl_process_add_sta_resp(struct iwl_priv *priv, @@ -77,8 +81,7 @@ static int iwl_process_add_sta_resp(struct iwl_priv *priv, switch (pkt->u.add_sta.status) { case ADD_STA_SUCCESS_MSK: IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n"); - iwl_sta_ucode_activate(priv, sta_id); - ret = 0; + ret = iwl_sta_ucode_activate(priv, sta_id); break; case ADD_STA_NO_ROOM_IN_TABLE: IWL_ERR(priv, "Adding station %d failed, no room in table.\n", |