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`strncpy` is deprecated for use on NUL-terminated destination strings [1] and as such we should prefer more robust and less ambiguous string interfaces. A suitable replacement is `strscpy` [2] due to the fact that it guarantees NUL-termination on the destination buffer without unnecessarily NUL-padding. It should be noted that there doesn't currently exist a bug here as DRV_NAME is a small string literal which means no overread bugs are present. Also to note, other ethernet drivers are using strscpy in a similar pattern: | dec/tulip/tulip_core.c | 861: strscpy(info->driver, DRV_NAME, sizeof(info->driver)); | | 8390/ax88796.c | 582: strscpy(info->driver, DRV_NAME, sizeof(info->driver)); | | dec/tulip/dmfe.c | 1077: strscpy(info->driver, DRV_NAME, sizeof(info->driver)); | | 8390/etherh.c | 558: strscpy(info->driver, DRV_NAME, sizeof(info->driver)); Link: https://www.kernel.org/doc/html/latest/process/deprecated.html#strncpy-on-nul-terminated-strings [1] Link: https://manpages.debian.org/testing/linux-manual-4.8/strscpy.9.en.html [2] Link: https://github.com/KSPP/linux/issues/90 Signed-off-by: Justin Stitt <justinstitt@google.com> Reviewed-by: Kees Cook <keescook@chromium.org> Reviewed-by: Lukasz Stelmach <l.stelmach@samsung.com> Link: https://lore.kernel.org/r/20231005-strncpy-drivers-net-ethernet-asix-ax88796c_ioctl-c-v1-1-6fafdc38b170@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.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.