Fix missing bounds check

diff --git a/comedi/drivers/comedi_parport.c b/comedi/drivers/comedi_parport.c
index bb1d8e22e27301c01d0e53eb468d3e09e6942e86..8f9635140f81f197d70a7d0067f6ebb306d56d97 100644 (file)
--- a/comedi/drivers/comedi_parport.c
+++ b/comedi/drivers/comedi_parport.c
@@ -170,6 +170,8 @@ static int parport_insn_c(comedi_device *dev,comedi_subdevice *s,
 static int parport_intr_insn(comedi_device *dev,comedi_subdevice *s,
        comedi_insn *insn,lsampl_t *data)
 {
+       if(insn->n<1)return -EINVAL;
+
        data[1] = 0;
        return 2;
 }