1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/net/hamradio/hdlcdrv.c b/drivers/net/hamradio/hdlcdrv.c
index 8c3633c1d078..97e3bc60c3e7 100644
--- a/drivers/net/hamradio/hdlcdrv.c
+++ b/drivers/net/hamradio/hdlcdrv.c
@@ -576,6 +576,8 @@ static int hdlcdrv_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
         case HDLCDRVCTL_CALIBRATE:
                 if(!capable(CAP_SYS_RAWIO))
                         return -EPERM;
+                if (s->par.bitrate <= 0)
+                        return -EINVAL;
                 if (bi.data.calibrate > INT_MAX / s->par.bitrate)
                         return -EINVAL;
                 s->hdlctx.calibrate = bi.data.calibrate * s->par.bitrate / 16;