From a781cf94e6dcc09bf13e548298185d916d9ff3c8 Mon Sep 17 00:00:00 2001 From: Reinette Chatre Date: Mon, 21 Jan 2008 10:08:31 -0800 Subject: [PATCH] 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 Signed-off-by: John W. Linville --- 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 1a6b0e0..0b3ec7e 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 6cd57c2..15a45f4 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); -- 2.7.4