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-rw-r--r--tun/wintun/setupapi/setupapi_windows.go2
1 files changed, 1 insertions, 1 deletions
diff --git a/tun/wintun/setupapi/setupapi_windows.go b/tun/wintun/setupapi/setupapi_windows.go
index 1731f4b..8524558 100644
--- a/tun/wintun/setupapi/setupapi_windows.go
+++ b/tun/wintun/setupapi/setupapi_windows.go
@@ -157,7 +157,7 @@ func SetupDiGetDriverInfoDetail(deviceInfoSet DevInfo, deviceInfoData *DevInfoDa
data := (*DrvInfoDetailData)(unsafe.Pointer(&buf[0]))
// unsafe.Sizeof(data) >= sizeof(SP_DRVINFO_DETAIL_DATA) due to Go trailing padding. SetupAPI expects exactly sizeof(SP_DRVINFO_DETAIL_DATA).
- sizeAPI := unsafe.Offsetof(data.hardwareID) + unsafe.Sizeof(data.hardwareID)
+ sizeAPI := ((unsafe.Sizeof(uintptr(0)) - 1) | (unsafe.Offsetof(data.hardwareID) + unsafe.Sizeof(data.hardwareID) - 1) + 1)
data.size = uint32(sizeAPI)
err := setupDiGetDriverInfoDetail(deviceInfoSet, deviceInfoData, driverInfoData, data, bufCapacity, &bufLen)