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crypto: qat - refactor deprecated strncpy

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`strncpy` is deprecated for use on NUL-terminated destination strings [1].

We should prefer more robust and less ambiguous string interfaces.

`buf` is expected to be NUL-terminated for its eventual use in
`kstrtoul()` and NUL-padding is not required.

Due to the above, a suitable replacement is `strscpy` [2] due to the
fact that it guarantees NUL-termination on the destination buffer.

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>
Acked-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Justin Stitt 2023-09-13 00:51:05 +00:00 committed by Herbert Xu
parent 0da05a040d
commit 3102bbcdcd
1 changed files with 1 additions and 1 deletions
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2
drivers/crypto/intel/qat/qat_common/qat_uclo.c
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@ -200,7 +200,7 @@ static int qat_uclo_parse_num(char *str, unsigned int *num)
unsigned long ae = 0;
int i;
strncpy(buf, str, 15);
strscpy(buf, str, sizeof(buf));
for (i = 0; i < 16; i++) {
if (!isdigit(buf[i])) {
buf[i] = '\0';