Messages in this thread | | | Date | Tue, 10 Oct 2023 15:51:23 -0700 | From | Kees Cook <> | Subject | Re: [PATCH] ibmvnic: replace deprecated strncpy with strscpy |
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On Mon, Oct 09, 2023 at 11:19:57PM +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. > > NUL-padding is not required as the buffer is already memset to 0: > | memset(adapter->fw_version, 0, 32); > > Note that another usage of strscpy exists on the same buffer: > | strscpy((char *)adapter->fw_version, "N/A", sizeof(adapter->fw_version)); > > 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. > > 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 <justinstitt@google.com>
Thanks, this looks right to me.
Reviewed-by: Kees Cook <keescook@chromium.org>
-- Kees Cook
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