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Date:   Wed, 22 May 2019 17:22:30 -0700 (PDT)
From:   David Miller <>
Subject: Re: [PATCH] mISDN: make sure device name is NUL terminated

From: Dan Carpenter <>
Date: Wed, 22 May 2019 11:45:13 +0300

> 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 <>


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