From a781cf94e6dcc09bf13e548298185d916d9ff3c8 Mon Sep 17 00:00:00 2001
From: Reinette Chatre <reinette.chatre@intel.com>
Date: Mon, 21 Jan 2008 10:08:31 -0800
Subject: iwlwifi: fix possible read attempt on ucode that is not available
This fixes a NULL pointer dereference that can occur when the
ucode is not loaded at the time __iwl_up is called.
The problem was reported at http://kerneloops.org/raw.php?rawid=2765&msgid=
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---
drivers/net/wireless/iwlwifi/iwl3945-base.c | 5 +++++
drivers/net/wireless/iwlwifi/iwl4965-base.c | 5 +++++
2 files changed, 10 insertions(+)
diff --git a/drivers/net/wireless/iwlwifi/iwl3945-base.c b/drivers/net/wireless/iwlwifi/iwl3945-base.c
index 1a6b0e0edf6f..0b3ec7e4d93b 100644
--- a/drivers/net/wireless/iwlwifi/iwl3945-base.c
+++ b/drivers/net/wireless/iwlwifi/iwl3945-base.c
@@ -6342,6 +6342,11 @@ static int __iwl_up(struct iwl_priv *priv)
return 0;
}
+ if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
+ IWL_ERROR("ucode not available for device bringup\n");
+ return -EIO;
+ }
+
iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
rc = iwl_hw_nic_init(priv);
diff --git a/drivers/net/wireless/iwlwifi/iwl4965-base.c b/drivers/net/wireless/iwlwifi/iwl4965-base.c
index 6cd57c220631..15a45f471710 100644
--- a/drivers/net/wireless/iwlwifi/iwl4965-base.c
+++ b/drivers/net/wireless/iwlwifi/iwl4965-base.c
@@ -6698,6 +6698,11 @@ static int __iwl_up(struct iwl_priv *priv)
return 0;
}
+ if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
+ IWL_ERROR("ucode not available for device bringup\n");
+ return -EIO;
+ }
+
iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
rc = iwl_hw_nic_init(priv);
--
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