This is a note to let you know that I've just added the patch titled
wifi: iwlwifi: mvm: guard against invalid STA ID on removal
to the 6.8-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
wifi-iwlwifi-mvm-guard-against-invalid-sta-id-on-rem.patch
and it can be found in the queue-6.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit e3ba0072257daaac5f7ca406d319882a9f4b3da5
Author: Benjamin Berg <benjamin.berg@xxxxxxxxx>
Date: Wed Mar 20 23:26:23 2024 +0200
wifi: iwlwifi: mvm: guard against invalid STA ID on removal
[ Upstream commit 17f64517bf5c26af56b6c3566273aad6646c3c4f ]
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@xxxxxxxxx>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@xxxxxxxxx>
Link: https://msgid.link/20240320232419.d523167bda9c.I1cffd86363805bf86a95d8bdfd4b438bb54baddc@changeid
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mld-sta.c b/drivers/net/wireless/intel/iwlwifi/mvm/mld-sta.c
index 1628bf55458fc..23e64a757cfe8 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;
