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wifi: iwlwifi: mvm: fix size check for fw_link_id

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[ Upstream commit e25bd1853c ]

Check that fw_link_id does not exceed the size of link_id_to_link_conf
array. There's no any codepath that can cause that, but it's still
safer to verify in case fw_link_id gets corrupted.

Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20231017115047.3385bd11f423.I2d30fdb464f951c648217553c47901857a0046c7@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Gregory Greenman 2023-10-17 12:16:44 +03:00 committed by Greg Kroah-Hartman
parent aa4dd55ade
commit d09d246f6a
1 changed files with 2 additions and 2 deletions
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4
drivers/net/wireless/intel/iwlwifi/mvm/link.c
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@ -60,7 +60,7 @@ int iwl_mvm_add_link(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
if (link_info->fw_link_id == IWL_MVM_FW_LINK_ID_INVALID) {
link_info->fw_link_id = iwl_mvm_get_free_fw_link_id(mvm,
mvmvif);
if (link_info->fw_link_id == IWL_MVM_FW_LINK_ID_INVALID)
if (link_info->fw_link_id >= ARRAY_SIZE(mvm->link_id_to_link_conf))
return -EINVAL;
rcu_assign_pointer(mvm->link_id_to_link_conf[link_info->fw_link_id],
@ -243,7 +243,7 @@ int iwl_mvm_remove_link(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
int ret;
if (WARN_ON(!link_info ||
link_info->fw_link_id == IWL_MVM_FW_LINK_ID_INVALID))
link_info->fw_link_id >= ARRAY_SIZE(mvm->link_id_to_link_conf)))
return -EINVAL;
RCU_INIT_POINTER(mvm->link_id_to_link_conf[link_info->fw_link_id],