From: Baochen Qiang <quic_bqiang@xxxxxxxxxxx> [ Upstream commit b302dce3d9edea5b93d1902a541684a967f3c63c ] reg_cap.phy_id is extracted from WMI event and could be an unexpected value in case some errors happen. As a result out-of-bound write may occur to soc->hal_reg_cap. Fix it by validating reg_cap.phy_id before using it. This is found during code review. Compile tested only. Signed-off-by: Baochen Qiang <quic_bqiang@xxxxxxxxxxx> Acked-by: Jeff Johnson <quic_jjohnson@xxxxxxxxxxx> Signed-off-by: Kalle Valo <quic_kvalo@xxxxxxxxxxx> Link: https://lore.kernel.org/r/20230830020716.5420-1-quic_bqiang@xxxxxxxxxxx Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/net/wireless/ath/ath12k/wmi.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/net/wireless/ath/ath12k/wmi.c b/drivers/net/wireless/ath/ath12k/wmi.c index eebc5a65ce3b4..416b22fa53ebf 100644 --- a/drivers/net/wireless/ath/ath12k/wmi.c +++ b/drivers/net/wireless/ath/ath12k/wmi.c @@ -3799,6 +3799,12 @@ static int ath12k_wmi_ext_hal_reg_caps(struct ath12k_base *soc, ath12k_warn(soc, "failed to extract reg cap %d\n", i); return ret; } + + if (reg_cap.phy_id >= MAX_RADIOS) { + ath12k_warn(soc, "unexpected phy id %u\n", reg_cap.phy_id); + return -EINVAL; + } + soc->hal_reg_cap[reg_cap.phy_id] = reg_cap; } return 0; -- 2.42.0
