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Message-ID: <20240324234027.1354210-57-sashal@kernel.org>
Date: Sun, 24 Mar 2024 19:37:24 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
stable@...r.kernel.org
Cc: Johannes Berg <johannes.berg@...el.com>,
Gregory Greenman <gregory.greenman@...el.com>,
Miri Korenblit <miriam.rachel.korenblit@...el.com>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.10 056/238] wifi: iwlwifi: dbg-tlv: ensure NUL termination
From: Johannes Berg <johannes.berg@...el.com>
[ Upstream commit ea1d166fae14e05d49ffb0ea9fcd4658f8d3dcea ]
The iwl_fw_ini_debug_info_tlv is used as a string, so we must
ensure the string is terminated correctly before using it.
Fixes: a9248de42464 ("iwlwifi: dbg_ini: add TLV allocation new API support")
Signed-off-by: Johannes Berg <johannes.berg@...el.com>
Reviewed-by: Gregory Greenman <gregory.greenman@...el.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@...el.com>
Link: https://msgid.link/20240128084842.be15e858ee89.Ibff93429cf999eafc7b26f3eef4c055dc84984a0@changeid
Signed-off-by: Johannes Berg <johannes.berg@...el.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
drivers/net/wireless/intel/iwlwifi/iwl-dbg-tlv.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-dbg-tlv.c b/drivers/net/wireless/intel/iwlwifi/iwl-dbg-tlv.c
index bcaec8a184cd6..299819d2d1904 100644
--- a/drivers/net/wireless/intel/iwlwifi/iwl-dbg-tlv.c
+++ b/drivers/net/wireless/intel/iwlwifi/iwl-dbg-tlv.c
@@ -155,6 +155,12 @@ static int iwl_dbg_tlv_alloc_debug_info(struct iwl_trans *trans,
if (le32_to_cpu(tlv->length) != sizeof(*debug_info))
return -EINVAL;
+ /* we use this as a string, ensure input was NUL terminated */
+ if (strnlen(debug_info->debug_cfg_name,
+ sizeof(debug_info->debug_cfg_name)) ==
+ sizeof(debug_info->debug_cfg_name))
+ return -EINVAL;
+
IWL_DEBUG_FW(trans, "WRT: Loading debug cfg: %s\n",
debug_info->debug_cfg_name);
--
2.43.0
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