Firo Yang fb3ce90b7d hdlcdrv: Fix divide by zero in hdlcdrv_ioctl ...

syszkaller fuzzer triggered a divide by zero, when set calibration
through ioctl().

To fix it, test 'bitrate' if it is negative or 0, just return -EINVAL.

Reported-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Firo Yang <firogm@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2017-05-27 18:44:17 -04:00

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