| Message ID | 20230518071046.14337-1-quic_bselvara@quicinc.com |
|---|---|
| State | New |
| Headers | show |
| Series | wifi: ath12k: Avoid NULL pointer access during management transmit cleanup | expand |
On 5/18/2023 12:40 PM, Balamurugan S wrote: > Currently 'ar' reference is not added in skb_cb. > Though this is generally not used during transmit completion > callbacks, on interface removal the remaining idr cleanup callback > uses the ar pointer from skb_cb from management txmgmt_idr. Hence fill them > during transmit call for proper usage to avoid NULL pointer dereference. > > Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.0.1-00029-QCAHKSWPL_SILICONZ-1 > > Signed-off-by: Balamurugan S <quic_bselvara@quicinc.com> > --- > drivers/net/wireless/ath/ath12k/mac.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/net/wireless/ath/ath12k/mac.c b/drivers/net/wireless/ath/ath12k/mac.c > index d814d74bc168..a344211f5b53 100644 > --- a/drivers/net/wireless/ath/ath12k/mac.c > +++ b/drivers/net/wireless/ath/ath12k/mac.c > @@ -4443,6 +4443,7 @@ static int ath12k_mac_mgmt_tx_wmi(struct ath12k *ar, struct ath12k_vif *arvif, > int buf_id; > int ret; > > + ATH12K_SKB_CB(skb)->ar = ar; > spin_lock_bh(&ar->txmgmt_idr_lock); > buf_id = idr_alloc(&ar->txmgmt_idr, skb, 0, > ATH12K_TX_MGMT_NUM_PENDING_MAX, GFP_ATOMIC); > > base-commit: 610b78b97bad8f3e77c27a15e9a03cbbb4109697 LGTM
Balamurugan S <quic_bselvara@quicinc.com> wrote: > Currently 'ar' reference is not added in skb_cb. > Though this is generally not used during transmit completion > callbacks, on interface removal the remaining idr cleanup callback > uses the ar pointer from skb_cb from management txmgmt_idr. Hence fill them > during transmit call for proper usage to avoid NULL pointer dereference. > > Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.0.1-00029-QCAHKSWPL_SILICONZ-1 > > Signed-off-by: Balamurugan S <quic_bselvara@quicinc.com> > Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com> Patch applied to ath-next branch of ath.git, thanks. 054b5580a36e wifi: ath12k: Avoid NULL pointer access during management transmit cleanup
diff --git a/drivers/net/wireless/ath/ath12k/mac.c b/drivers/net/wireless/ath/ath12k/mac.c index d814d74bc168..a344211f5b53 100644 --- a/drivers/net/wireless/ath/ath12k/mac.c +++ b/drivers/net/wireless/ath/ath12k/mac.c @@ -4443,6 +4443,7 @@ static int ath12k_mac_mgmt_tx_wmi(struct ath12k *ar, struct ath12k_vif *arvif, int buf_id; int ret; + ATH12K_SKB_CB(skb)->ar = ar; spin_lock_bh(&ar->txmgmt_idr_lock); buf_id = idr_alloc(&ar->txmgmt_idr, skb, 0, ATH12K_TX_MGMT_NUM_PENDING_MAX, GFP_ATOMIC);
Currently 'ar' reference is not added in skb_cb. Though this is generally not used during transmit completion callbacks, on interface removal the remaining idr cleanup callback uses the ar pointer from skb_cb from management txmgmt_idr. Hence fill them during transmit call for proper usage to avoid NULL pointer dereference. Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.0.1-00029-QCAHKSWPL_SILICONZ-1 Signed-off-by: Balamurugan S <quic_bselvara@quicinc.com> --- drivers/net/wireless/ath/ath12k/mac.c | 1 + 1 file changed, 1 insertion(+) base-commit: 610b78b97bad8f3e77c27a15e9a03cbbb4109697