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iwlwifi: tighten boundary checks

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The driver assumes certain sizes and lengths aren't crossed in some
places.  Make sure this indeed happens.

Found by Klocwork.

Signed-off-by: Liad Kaufman <liad.kaufman@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
This commit is contained in:
Liad Kaufman 2018-10-21 14:39:05 +03:00 • committed by Luca Coelho
parent 45dc7ba4b4
commit 162b22c93e
3 changed files with 26 additions and 6 deletions
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2
drivers/net/wireless/intel/iwlwifi/fw/dbg.c
View file

@ -835,6 +835,8 @@ _iwl_fw_error_dump(struct iwl_fw_runtime *fwrt,
if (!fwrt->trans->cfg->dccm_offset || !fwrt->trans->cfg->dccm_len) {
const struct fw_img *img;
if (fwrt->cur_fw_img >= IWL_UCODE_TYPE_MAX)
return NULL;
img = &fwrt->fw->img[fwrt->cur_fw_img];
sram_ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;

24
drivers/net/wireless/intel/iwlwifi/mvm/tx.c
View file

@ -1024,7 +1024,12 @@ static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm,
int airtime)
{
int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[mac];
struct iwl_mvm_tcm_mac *mdata;
if (mac >= NUM_MAC_INDEX_DRIVER)
return;
mdata = &mvm->tcm.data[mac];
if (mvm->tcm.paused)
return;
@ -1035,14 +1040,21 @@ static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm,
mdata->tx.airtime += airtime;
}
static void iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm,
struct iwl_mvm_sta *mvmsta, int tid)
static int iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm,
struct iwl_mvm_sta *mvmsta, int tid)
{
u32 ac = tid_to_mac80211_ac[tid];
int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[mac];
struct iwl_mvm_tcm_mac *mdata;
if (mac >= NUM_MAC_INDEX_DRIVER)
return -EINVAL;
mdata = &mvm->tcm.data[mac];
mdata->tx.pkts[ac]++;
return 0;
}
/*
@ -1162,7 +1174,9 @@ static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
spin_unlock(&mvmsta->lock);
iwl_mvm_tx_pkt_queued(mvm, mvmsta, tid == IWL_MAX_TID_COUNT ? 0 : tid);
if (iwl_mvm_tx_pkt_queued(mvm, mvmsta,
tid == IWL_MAX_TID_COUNT ? 0 : tid))
goto drop;
return 0;

6
drivers/net/wireless/intel/iwlwifi/pcie/tx-gen2.c
View file

@ -214,7 +214,11 @@ static int iwl_pcie_gen2_set_tb(struct iwl_trans *trans,
{
struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
int idx = iwl_pcie_gen2_get_num_tbs(trans, tfd);
struct iwl_tfh_tb *tb = &tfd->tbs[idx];
struct iwl_tfh_tb *tb;
if (WARN_ON(idx >= IWL_NUM_OF_TBS))
return -EINVAL;
tb = &tfd->tbs[idx];
/* Each TFD can point to a maximum max_tbs Tx buffers */
if (le16_to_cpu(tfd->num_tbs) >= trans_pcie->max_tbs) {