From: Johannes Berg <[email protected]>
Ensure that the TX command scratch fits into the buffer
provided by the first TB. It does, of course, but add
some build-time validations in case we touch this code.
Signed-off-by: Johannes Berg <[email protected]>
Signed-off-by: Gregory Greenman <[email protected]>
---
drivers/net/wireless/intel/iwlwifi/pcie/tx.c | 5 ++++-
drivers/net/wireless/intel/iwlwifi/queue/tx.c | 7 +++++++
2 files changed, 11 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/tx.c b/drivers/net/wireless/intel/iwlwifi/pcie/tx.c
index 3546c5269c3b..1337fa95f657 100644
--- a/drivers/net/wireless/intel/iwlwifi/pcie/tx.c
+++ b/drivers/net/wireless/intel/iwlwifi/pcie/tx.c
@@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
/*
- * Copyright (C) 2003-2014, 2018-2021 Intel Corporation
+ * Copyright (C) 2003-2014, 2018-2021, 2023 Intel Corporation
* Copyright (C) 2013-2015 Intel Mobile Communications GmbH
* Copyright (C) 2016-2017 Intel Deutschland GmbH
*/
@@ -1547,6 +1547,9 @@ int iwl_trans_pcie_tx(struct iwl_trans *trans, struct sk_buff *skb,
/* there must be data left over for TB1 or this code must be changed */
BUILD_BUG_ON(sizeof(struct iwl_tx_cmd) < IWL_FIRST_TB_SIZE);
+ BUILD_BUG_ON(sizeof(struct iwl_cmd_header) +
+ offsetofend(struct iwl_tx_cmd, scratch) >
+ IWL_FIRST_TB_SIZE);
/* map the data for TB1 */
tb1_addr = ((u8 *)&dev_cmd->hdr) + IWL_FIRST_TB_SIZE;
diff --git a/drivers/net/wireless/intel/iwlwifi/queue/tx.c b/drivers/net/wireless/intel/iwlwifi/queue/tx.c
index 245bff01b4f8..fbacbe9ada15 100644
--- a/drivers/net/wireless/intel/iwlwifi/queue/tx.c
+++ b/drivers/net/wireless/intel/iwlwifi/queue/tx.c
@@ -648,6 +648,13 @@ struct iwl_tfh_tfd *iwl_txq_gen2_build_tfd(struct iwl_trans *trans,
/* There must be data left over for TB1 or this code must be changed */
BUILD_BUG_ON(sizeof(struct iwl_tx_cmd_gen2) < IWL_FIRST_TB_SIZE);
+ BUILD_BUG_ON(sizeof(struct iwl_cmd_header) +
+ offsetofend(struct iwl_tx_cmd_gen2, dram_info) >
+ IWL_FIRST_TB_SIZE);
+ BUILD_BUG_ON(sizeof(struct iwl_tx_cmd_gen3) < IWL_FIRST_TB_SIZE);
+ BUILD_BUG_ON(sizeof(struct iwl_cmd_header) +
+ offsetofend(struct iwl_tx_cmd_gen3, dram_info) >
+ IWL_FIRST_TB_SIZE);
memset(tfd, 0, sizeof(*tfd));
--
2.38.1