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wifi: iwlwifi: dbg-tlv: ensure NUL termination

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[ Upstream commit ea1d166fae ]

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: a9248de424 ("iwlwifi: dbg_ini: add TLV allocation new API support")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Reviewed-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://msgid.link/20240128084842.be15e858ee89.Ibff93429cf999eafc7b26f3eef4c055dc84984a0@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Johannes Berg 2024-01-28 08:53:53 +02:00 committed by Sasha Levin
parent 1bc5461a21
commit fabe2db7de
1 changed files with 6 additions and 0 deletions
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6
drivers/net/wireless/intel/iwlwifi/iwl-dbg-tlv.c
View file

@ -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);