diff options
| author | Dan Carpenter <dan.carpenter@oracle.com> | 2018-10-18 10:36:19 +0300 |
|---|---|---|
| committer | Kalle Valo <kvalo@codeaurora.org> | 2018-11-05 14:09:58 +0300 |
| commit | 539b44e70c5b4ad82d2c0c97a4dfb37523d891f6 (patch) | |
| tree | 96e59c2df6380c543edef0a56a4fbf49a1e669c3 /drivers/net/wireless/ath/ath10k/mac.c | |
| parent | 13104929d2ec32aec0552007d55b9e15bc07176b (diff) | |
| download | linux-539b44e70c5b4ad82d2c0c97a4dfb37523d891f6.tar.xz | |
ath10k: fixup extended per sta tx statistics
I had a couple concerns with this code. First, we definitely need to
set the error code if the kzalloc() fails. Secondly, I was worried that
if we didn't set "arsta->tx_stats" to NULL after freeing it, then it
looks to me like it might lead to a use after free. I can't test that,
but it's harmless to set it to NULL so I did.
Fixes: a904417fc876 ("ath10k: add extended per sta tx statistics support")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Diffstat (limited to 'drivers/net/wireless/ath/ath10k/mac.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath10k/mac.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c index a1c2801ded10..2b8c8bf80b0d 100644 --- a/drivers/net/wireless/ath/ath10k/mac.c +++ b/drivers/net/wireless/ath/ath10k/mac.c @@ -6296,8 +6296,10 @@ static int ath10k_sta_state(struct ieee80211_hw *hw, if (ath10k_debug_is_extd_tx_stats_enabled(ar)) { arsta->tx_stats = kzalloc(sizeof(*arsta->tx_stats), GFP_KERNEL); - if (!arsta->tx_stats) + if (!arsta->tx_stats) { + ret = -ENOMEM; goto exit; + } } num_tdls_stations = ath10k_mac_tdls_vif_stations_count(hw, vif); @@ -6385,8 +6387,10 @@ static int ath10k_sta_state(struct ieee80211_hw *hw, "mac vdev %d peer delete %pM sta %pK (sta gone)\n", arvif->vdev_id, sta->addr, sta); - if (ath10k_debug_is_extd_tx_stats_enabled(ar)) + if (ath10k_debug_is_extd_tx_stats_enabled(ar)) { kfree(arsta->tx_stats); + arsta->tx_stats = NULL; + } if (sta->tdls) { ret = ath10k_mac_tdls_peer_update(ar, arvif->vdev_id, |