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| author | Eyal Shapira <eyal@wizery.com> | 2015-01-16 11:09:30 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-03-06 14:40:48 -0800 |
| commit | 12faeccac04d9a018b662561204cb31c64aa3590 (patch) | |
| tree | 5d578febec9a546df772d4662be2001a58eaab51 /drivers | |
| parent | a7596982b02d15570974252f6b1aeaf4e5589e1a (diff) | |
| download | lwn-12faeccac04d9a018b662561204cb31c64aa3590.tar.gz lwn-12faeccac04d9a018b662561204cb31c64aa3590.zip | |
iwlwifi: mvm: validate tid and sta_id in ba_notif
commit 2cee4762c528a9bd2cdff793197bf591a2196c11 upstream.
These are coming from the FW and are used to access arrays.
Bad values can cause an out of bounds access so discard
such ba_notifs and warn.
Signed-off-by: Eyal Shapira <eyalx.shapira@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/mvm/tx.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlwifi/mvm/tx.c b/drivers/net/wireless/iwlwifi/mvm/tx.c index 4ec8385e4307..3dd0e5bfa0fc 100644 --- a/drivers/net/wireless/iwlwifi/mvm/tx.c +++ b/drivers/net/wireless/iwlwifi/mvm/tx.c @@ -832,6 +832,11 @@ int iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, sta_id = ba_notif->sta_id; tid = ba_notif->tid; + if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT || + tid >= IWL_MAX_TID_COUNT, + "sta_id %d tid %d", sta_id, tid)) + return 0; + rcu_read_lock(); sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); |