[bug report] thermal/drivers/mediatek: Add the Low Voltage Thermal Sensor driver
Dan Carpenter
error27 at gmail.com
Mon Feb 27 03:26:33 PST 2023
Hello Balsam CHIHI,
The patch f5f633b18234: "thermal/drivers/mediatek: Add the Low
Voltage Thermal Sensor driver" from Feb 9, 2023, leads to the
following Smatch static checker warning:
drivers/thermal/mediatek/lvts_thermal.c:562 lvts_calibration_init()
warn: not copying enough bytes for '&lvts_ctrl->calibration[i]' (4 vs 2 bytes)
drivers/thermal/mediatek/lvts_thermal.c
555 static int lvts_calibration_init(struct device *dev, struct lvts_ctrl *lvts_ctrl,
556 const struct lvts_ctrl_data *lvts_ctrl_data,
557 u8 *efuse_calibration)
558 {
559 int i;
560
561 for (i = 0; i < lvts_ctrl_data->num_lvts_sensor; i++)
--> 562 memcpy(&lvts_ctrl->calibration[i],
563 efuse_calibration + lvts_ctrl_data->cal_offset[i], 2);
^
This is copying an array of known ints to a u32 array. It should copy
sizeof(int) instead of 2. It only works because the data you're on
little endian and the data is small.
564
565 return 0;
566 }
regards,
dan carpenter
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