diff options
| author | Colin Ian King <colin.king@canonical.com> | 2020-01-11 09:08:24 +0000 |
|---|---|---|
| committer | Kalle Valo <kvalo@codeaurora.org> | 2020-01-26 12:48:09 +0200 |
| commit | 3b4516838eaabacc56770f12407d5f791c88838a (patch) | |
| tree | c2a1568a8acc7eb90f4b1cf144c31cfbb9502775 /drivers/net/wireless/ath | |
| parent | 875603b3de9fb5dc11acf80b6df45709adec68b2 (diff) | |
ath11k: avoid null pointer dereference when pointer band is null
In the unlikely event that cap->supported_bands has neither
WMI_HOST_WLAN_2G_CAP set or WMI_HOST_WLAN_5G_CAP set then pointer
band is null and a null dereference occurs when assigning
band->n_iftype_data. Move the assignment to the if blocks to
avoid this. Cleans up static analysis warnings.
Addresses-Coverity: ("Explicit null dereference")
Fixes: 9f056ed8ee01 ("ath11k: add HE support")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Diffstat (limited to 'drivers/net/wireless/ath')
| -rw-r--r-- | drivers/net/wireless/ath/ath11k/mac.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/net/wireless/ath/ath11k/mac.c b/drivers/net/wireless/ath/ath11k/mac.c index f9ab02e84d13..6640662f5ede 100644 --- a/drivers/net/wireless/ath/ath11k/mac.c +++ b/drivers/net/wireless/ath/ath11k/mac.c @@ -3520,8 +3520,8 @@ static int ath11k_mac_copy_he_cap(struct ath11k *ar, static void ath11k_mac_setup_he_cap(struct ath11k *ar, struct ath11k_pdev_cap *cap) { - struct ieee80211_supported_band *band = NULL; - int count = 0; + struct ieee80211_supported_band *band; + int count; if (cap->supported_bands & WMI_HOST_WLAN_2G_CAP) { count = ath11k_mac_copy_he_cap(ar, cap, @@ -3529,6 +3529,7 @@ static void ath11k_mac_setup_he_cap(struct ath11k *ar, NL80211_BAND_2GHZ); band = &ar->mac.sbands[NL80211_BAND_2GHZ]; band->iftype_data = ar->mac.iftype[NL80211_BAND_2GHZ]; + band->n_iftype_data = count; } if (cap->supported_bands & WMI_HOST_WLAN_5G_CAP) { @@ -3537,9 +3538,8 @@ static void ath11k_mac_setup_he_cap(struct ath11k *ar, NL80211_BAND_5GHZ); band = &ar->mac.sbands[NL80211_BAND_5GHZ]; band->iftype_data = ar->mac.iftype[NL80211_BAND_5GHZ]; + band->n_iftype_data = count; } - - band->n_iftype_data = count; } static int __ath11k_set_antenna(struct ath11k *ar, u32 tx_ant, u32 rx_ant) |