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Checkpatch suggests using strscpy() instead of strcpy().
The advantages of strscpy() are that it always adds a NUL terminator
and prevents read/write overflows if the source string is not properly
terminated.
strcpy() lacks built-in bounds checking for the destination buffer,
making it susceptible to buffer overflows. These overflows can lead
to various unpredictable behaviors.
In this specific context, both strscpy and strcpy performs the same
operation without any functional difference.
The reason for this equivalence is that the driver_name string "vme_fake"
is shorter than the size of the fake_bridge->name array which is defined
as 16 characters (struct vme_bridge {char name[VMENAMSIZ];...}). Thus,
there is no risk of buffer overflow in either case. VMENAMSIZ variable
holds a constant value of 16 (#define VMENAMSIZ 16)
The null-terminated "vme_fake" string
(static const char driver_name[] = "vme_fake";) can be safely copied into
fake_bridge->name using either strscpy or strcpy.
While using strscpy() does not address any bugs, it is considered a better
practice and aligns with checkpatch recommendations.
Reviewed-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Calvince Otieno <calvncce@gmail.com>
Link: https://lore.kernel.org/r/ZTDS2H48JBUTiwZi@lab-ubuntu
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.