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| author | Mordechay Goodstein <mordechay.goodstein@intel.com> | 2018-10-21 18:27:26 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-01-27 16:46:14 +0300 |
| commit | 61c39d4a8938e8a537e466e11cb005d51004e0e6 (patch) | |
| tree | 9c8ea462b86b8ada68aabb357995a996bd15f435 /drivers/net/wireless | |
| parent | 0bac5b8392da768ffe67ccc0310f35e4a64a277f (diff) | |
| download | linux-61c39d4a8938e8a537e466e11cb005d51004e0e6.tar.xz | |
iwlwifi: mvm: avoid possible access out of array.
[ Upstream commit b0d795a9ae558209656b18930c2b4def5f8fdfb8 ]
The value in txq_id can be out of array scope,
validate it before accessing the array.
Signed-off-by: Mordechay Goodstein <mordechay.goodstein@intel.com>
Fixes: cf961e16620f ("iwlwifi: mvm: support dqa-mode agg on non-shared queue")
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/net/wireless')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/mvm/sta.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/sta.c b/drivers/net/wireless/intel/iwlwifi/mvm/sta.c index 0cfdbaa2af3a..684c0f65a052 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/sta.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/sta.c @@ -2417,7 +2417,7 @@ int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); struct iwl_mvm_tid_data *tid_data; u16 normalized_ssn; - int txq_id; + u16 txq_id; int ret; if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) @@ -2452,17 +2452,24 @@ int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, */ txq_id = mvmsta->tid_data[tid].txq_id; if (txq_id == IWL_MVM_INVALID_QUEUE) { - txq_id = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, - IWL_MVM_DQA_MIN_DATA_QUEUE, - IWL_MVM_DQA_MAX_DATA_QUEUE); - if (txq_id < 0) { - ret = txq_id; + ret = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, + IWL_MVM_DQA_MIN_DATA_QUEUE, + IWL_MVM_DQA_MAX_DATA_QUEUE); + if (ret < 0) { IWL_ERR(mvm, "Failed to allocate agg queue\n"); goto release_locks; } + txq_id = ret; + /* TXQ hasn't yet been enabled, so mark it only as reserved */ mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED; + } else if (WARN_ON(txq_id >= IWL_MAX_HW_QUEUES)) { + ret = -ENXIO; + IWL_ERR(mvm, "tid_id %d out of range (0, %d)!\n", + tid, IWL_MAX_HW_QUEUES - 1); + goto out; + } else if (unlikely(mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_SHARED)) { ret = -ENXIO; |