tree bae6fef28a7f7ea43be32abbbd03315b08c30f61
parent 8a58d4a26b351c32abee35697ff6eca976ea701a
author Dan Carpenter <dan.carpenter@oracle.com> 1558514713 +0300
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1561184176 +0200

mISDN: make sure device name is NUL terminated

[ Upstream commit ccfb62f27beb295103e9392462b20a6ed807d0ea ]

The user can change the device_name with the IMSETDEVNAME ioctl, but we
need to ensure that the user's name is NUL terminated.  Otherwise it
could result in a buffer overflow when we copy the name back to the user
with IMGETDEVINFO ioctl.

I also changed two strcpy() calls which handle the name to strscpy().
Hopefully, there aren't any other ways to create a too long name, but
it's nice to do this as a kernel hardening measure.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>