From: Ajith C quic_ajithc@quicinc.com
[ Upstream commit db163a463bb93cd3e37e1e7b10b9726fb6f95857 ]
Currently, if the access point receives an association request containing an Extended HE Capabilities Information Element with an invalid MCS-NSS, it triggers a firmware crash.
This issue arises when EHT-PHY capabilities shows support for a bandwidth and MCS-NSS set for that particular bandwidth is filled by zeros and due to this, driver obtains peer_nss as 0 and sending this value to firmware causes crash.
Address this issue by implementing a validation step for the peer_nss value before passing it to the firmware. If the value is greater than zero, proceed with forwarding it to the firmware. However, if the value is invalid, reject the association request to prevent potential firmware crashes.
Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.0.1-00029-QCAHKSWPL_SILICONZ-1
Signed-off-by: Ajith C quic_ajithc@quicinc.com Acked-by: Jeff Johnson quic_jjohnson@quicinc.com Signed-off-by: Kalle Valo quic_kvalo@quicinc.com Link: https://patch.msgid.link/20240613053528.2541645-1-quic_ajithc@quicinc.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/wireless/ath/ath12k/mac.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/net/wireless/ath/ath12k/mac.c b/drivers/net/wireless/ath/ath12k/mac.c index 5bcfc1cf5adc8..0f4ba1c11f728 100644 --- a/drivers/net/wireless/ath/ath12k/mac.c +++ b/drivers/net/wireless/ath/ath12k/mac.c @@ -3357,6 +3357,11 @@ static int ath12k_station_assoc(struct ath12k *ar,
ath12k_peer_assoc_prepare(ar, vif, sta, &peer_arg, reassoc);
+ if (peer_arg.peer_nss < 1) { + ath12k_warn(ar->ab, + "invalid peer NSS %d\n", peer_arg.peer_nss); + return -EINVAL; + } ret = ath12k_wmi_send_peer_assoc_cmd(ar, &peer_arg); if (ret) { ath12k_warn(ar->ab, "failed to run peer assoc for STA %pM vdev %i: %d\n",