From: Miri Korenblit <miriam.rachel.korenblit@xxxxxxxxx> [ Upstream commit 557a6cd847645e667f3b362560bd7e7c09aac284 ] iwl_mvm_tx_skb_sta() and iwl_mvm_tx_mpdu() verify that the mvmvsta pointer is not NULL. It retrieves this pointer using iwl_mvm_sta_from_mac80211, which is dereferencing the ieee80211_sta pointer. If sta is NULL, iwl_mvm_sta_from_mac80211 will dereference a NULL pointer. Fix this by checking the sta pointer before retrieving the mvmsta from it. If sta is not NULL, then mvmsta isn't either. Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@xxxxxxxxx> Reviewed-by: Johannes Berg <johannes.berg@xxxxxxxxx> Link: https://patch.msgid.link/20240825191257.880921ce23b7.I340052d70ab6d3410724ce955eb00da10e08188f@changeid Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/net/wireless/intel/iwlwifi/mvm/tx.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/tx.c b/drivers/net/wireless/intel/iwlwifi/mvm/tx.c index 3adb1acc07191..ce5f2bdde1388 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/tx.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/tx.c @@ -1145,6 +1145,9 @@ static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb, bool is_ampdu = false; int hdrlen; + if (WARN_ON_ONCE(!sta)) + return -1; + mvmsta = iwl_mvm_sta_from_mac80211(sta); fc = hdr->frame_control; hdrlen = ieee80211_hdrlen(fc); @@ -1152,9 +1155,6 @@ static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb, if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc)) return -1; - if (WARN_ON_ONCE(!mvmsta)) - return -1; - if (WARN_ON_ONCE(mvmsta->deflink.sta_id == IWL_MVM_INVALID_STA)) return -1; @@ -1285,7 +1285,7 @@ static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb, int iwl_mvm_tx_skb_sta(struct iwl_mvm *mvm, struct sk_buff *skb, struct ieee80211_sta *sta) { - struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); + struct iwl_mvm_sta *mvmsta; struct ieee80211_tx_info info; struct sk_buff_head mpdus_skbs; struct ieee80211_vif *vif; @@ -1294,9 +1294,11 @@ int iwl_mvm_tx_skb_sta(struct iwl_mvm *mvm, struct sk_buff *skb, struct sk_buff *orig_skb = skb; const u8 *addr3; - if (WARN_ON_ONCE(!mvmsta)) + if (WARN_ON_ONCE(!sta)) return -1; + mvmsta = iwl_mvm_sta_from_mac80211(sta); + if (WARN_ON_ONCE(mvmsta->deflink.sta_id == IWL_MVM_INVALID_STA)) return -1; -- 2.43.0
