From: Kees Cook <kees@kernel.org>
Date: Fri, 7 Feb 2025 00:48:13 +0000 (-0800)
Subject: uapi: stddef.h: Introduce __kernel_nonstring
X-Git-Tag: next-20250224~5^2^2~3
X-Git-Url: https://gentwo.org/gitweb/?a=commitdiff_plain;h=ec0451ed8b2978b76e5a86d502675b7c5c91222c;p=linux%2F.git

uapi: stddef.h: Introduce __kernel_nonstring

In order to annotate byte arrays in UAPI that are not C strings (i.e.
they may not be NUL terminated), the "nonstring" attribute is needed.
However, we can't expose this to userspace as it is compiler version
specific.

Signed-off-by: Kees Cook <kees@kernel.org>
---

diff --git a/include/uapi/linux/stddef.h b/include/uapi/linux/stddef.h
index a6fce46aeb37..b87df1b485c2 100644
--- a/include/uapi/linux/stddef.h
+++ b/include/uapi/linux/stddef.h
@@ -70,4 +70,10 @@
 #define __counted_by_be(m)
 #endif
 
+#ifdef __KERNEL__
+#define __kernel_nonstring	__nonstring
+#else
+#define __kernel_nonstring
+#endif
+
 #endif /* _UAPI_LINUX_STDDEF_H */