On Tue, Oct 03, 2023 at 10:23:07PM +0000, Justin Stitt wrote: > `strncpy` is deprecated for use on NUL-terminated destination strings > [1] and as such we should prefer more robust and less ambiguous string > interfaces. > > We expect both `kim_data->dev_name` and `kim_gdata->dev_name` to be > NUL-terminated. > > `kim_data->dev_name` seems to not require NUL-padding. > > `kim_gdata` is already zero-allocated and as such does not require > NUL-padding: > | kim_gdata = kzalloc(sizeof(struct kim_data_s), GFP_KERNEL); > > Considering the above, a suitable replacement is `strscpy` [2] due to > the fact that it guarantees NUL-termination on the destination buffer > without unnecessarily NUL-padding. > > Let's also opt to use the more idiomatic strscpy usage of: > strscpy(dest, src, sizeof(dest)) > > 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 > Cc: linux-hardening@vger.kernel.org > Signed-off-by: Justin Stitt <justinst...@google.com>
Thanks for the adjustment. This looks right to me now. Reviewed-by: Kees Cook <keesc...@chromium.org> -- Kees Cook
