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hdlcdrv: Fix divide by zero in hdlcdrv_ioctl
authorFiro Yang <firogm@gmail.com>
Fri, 26 May 2017 14:37:38 +0000 (22:37 +0800)
committerSasha Levin <alexander.levin@microsoft.com>
Wed, 23 May 2018 01:36:26 +0000 (21:36 -0400)
commit8347159bc5bbe6d5ff71499b0775d8416be7cb8b
treec5f273009c49ab0656328ab7df133e96404686e1tree
parent1450502513acc82462c8fa9d52ccfcad8ef1c390commit | diff
hdlcdrv: Fix divide by zero in hdlcdrv_ioctl

[ Upstream commit fb3ce90b7d7761b6f7f28f0ff5c456ef6b5229a1 ]

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>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
drivers/net/hamradio/hdlcdrv.c diff | blob | history
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