On Thu, Oct 05, 2023 at 01:06:26AM +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. > > 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 > Cc: linux-hardening@vger.kernel.org > Signed-off-by: Justin Stitt <justinst...@google.com>
Yeah, this looks like the others. Reviewed-by: Kees Cook <keesc...@chromium.org> -- Kees Cook
