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[02/17] wifi: iwlwifi: mvm: guard against invalid STA ID on removal

Message ID 20240320232419.d523167bda9c.I1cffd86363805bf86a95d8bdfd4b438bb54baddc@changeid
State New
Headers show
Series wifi: iwlwifi: updates - 2024-03-20 | expand

Commit Message

Miri Korenblit March 20, 2024, 9:26 p.m. UTC 
From: Benjamin Berg <benjamin.berg@intel.com>

Guard against invalid station IDs in iwl_mvm_mld_rm_sta_id as that would
result in out-of-bounds array accesses. This prevents issues should the
driver get into a bad state during error handling.

Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
---
 drivers/net/wireless/intel/iwlwifi/mvm/mld-sta.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mld-sta.c b/drivers/net/wireless/intel/iwlwifi/mvm/mld-sta.c
index 6f9ba0c18fa3..4ba1599ed71c 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mld-sta.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mld-sta.c
@@ -855,10 +855,15 @@  int iwl_mvm_mld_rm_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 
 int iwl_mvm_mld_rm_sta_id(struct iwl_mvm *mvm, u8 sta_id)
 {
-	int ret = iwl_mvm_mld_rm_sta_from_fw(mvm, sta_id);
+	int ret;
 
 	lockdep_assert_held(&mvm->mutex);
 
+	if (WARN_ON(sta_id == IWL_MVM_INVALID_STA))
+		return 0;
+
+	ret = iwl_mvm_mld_rm_sta_from_fw(mvm, sta_id);
+
 	RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
 	RCU_INIT_POINTER(mvm->fw_id_to_link_sta[sta_id], NULL);
 	return ret;