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(parent: 7db4487) | patch
hdlcdrv: Fix divide by zero in hdlcdrv_ioctl
authorFiro Yang <firogm@gmail.com>
Fri, 26 May 2017 14:37:38 +0000 (22:37 +0800)
committerDavid S. Miller <davem@davemloft.net>
Sat, 27 May 2017 22:44:17 +0000 (18:44 -0400)
commitc1d7202b4b9e3b6d17ee600cc58d9a0c6ced3767
tree68115fc1133d475bdfa9e5cc399c20f7715d3ec5tree | snapshot
parent7db448729439f18c150679546f06c9001461b7bacommit | diff
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>
drivers/net/hamradio/hdlcdrv.c diff | blob | history
Linux Kernel Source Tree.