Messages in this thread Patch in this message | | | Date | Mon, 11 Sep 2023 21:09:07 +0000 | Subject | [PATCH] aoe: refactor deprecated strncpy | From | Justin Stitt <> |
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`strncpy` is deprecated for use on NUL-terminated destination strings [1].
`aoe_iflist` is expected to be NUL-terminated which is evident by its use with string apis later on like `strspn`: | p = aoe_iflist + strspn(aoe_iflist, WHITESPACE);
It also seems `aoe_iflist` does not need to be NUL-padded which means `strscpy` [2] is a suitable replacement due to the fact that it guarantees NUL-termination on the destination buffer while not 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 Cc: Kees Cook <keescook@chromium.org> Cc: Xu Panda <xu.panda@zte.com.cn> Cc: Yang Yang <yang.yang29@zte.com> Signed-off-by: Justin Stitt <justinstitt@google.com> --- Note: This exact same patch exists [3] but seemed to die so I'm resending. If it was actually picked-up somewhere then we can ignore this patch.
[3]: https://lore.kernel.org/all/202212051930256039214@zte.com.cn/ --- drivers/block/aoe/aoenet.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/block/aoe/aoenet.c b/drivers/block/aoe/aoenet.c index 63773a90581d..c51ea95bc2ce 100644 --- a/drivers/block/aoe/aoenet.c +++ b/drivers/block/aoe/aoenet.c @@ -39,8 +39,7 @@ static struct ktstate kts; #ifndef MODULE static int __init aoe_iflist_setup(char *str) { - strncpy(aoe_iflist, str, IFLISTSZ); - aoe_iflist[IFLISTSZ - 1] = '\0'; + strscpy(aoe_iflist, str, IFLISTSZ); return 1; } --- base-commit: 2dde18cd1d8fac735875f2e4987f11817cc0bc2c change-id: 20230911-strncpy-drivers-block-aoe-aoenet-c-024debad6105 Best regards, -- Justin Stitt <justinstitt@google.com>
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