In w83793_detect_subclients(): if driver read tmp value sufficient for (tmp & 0x08) && (!(tmp & 0x80)) && ((tmp & 0x7) == ((tmp >> 4) & 0x7)) from device then Null pointer dereference occurs. (It is possible if tmp = 0b0xyz1xyz, where same chars mean same numbers). It can be fixed just by adding a checking for null pointer, patch for this is in the next letter. But a question arised: The array w83793_data->lm75 is used once in this function after switching to devm_i2c_new_dummy_device() instead of i2c_new_dummy(). And this function is called once (from w83793_probe()). Maybe this array should be deleted from struct w83793_data? The same situation in w83791d.c and in w83792d. Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Nadezda Lutovinova <lutovinova@xxxxxxxxx>
