diff options
| author | Bill Wendling <morbo@google.com> | 2026-01-16 00:57:57 +0000 |
|---|---|---|
| committer | Kees Cook <kees@kernel.org> | 2026-01-17 11:00:28 -0800 |
| commit | 150a04d817d8f5be5a4f92799827cdc8d7e45989 (patch) | |
| tree | 2551fa6089849d2f48cd9fc99563c7237e9c2d67 /include/uapi/linux | |
| parent | 9f54ab83cb2a17071be70a80b94db6c36e597696 (diff) | |
compiler_types.h: Attributes: Add __counted_by_ptr macro
Introduce __counted_by_ptr(), which works like __counted_by(), but for
pointer struct members.
struct foo {
int a, b, c;
char *buffer __counted_by_ptr(bytes);
short nr_bars;
struct bar *bars __counted_by_ptr(nr_bars);
size_t bytes;
};
Because "counted_by" can only be applied to pointer members in very
recent compiler versions, its application ends up needing to be distinct
from flexibe array "counted_by" annotations, hence a separate macro.
This is a reworking of Kees' previous patch [1].
Link: https://lore.kernel.org/all/20251020220118.1226740-1-kees@kernel.org/ [1]
Co-developed-by: Kees Cook <kees@kernel.org>
Signed-off-by: Bill Wendling <morbo@google.com>
Link: https://patch.msgid.link/20260116005838.2419118-1-morbo@google.com
Signed-off-by: Kees Cook <kees@kernel.org>
Diffstat (limited to 'include/uapi/linux')
| -rw-r--r-- | include/uapi/linux/stddef.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/uapi/linux/stddef.h b/include/uapi/linux/stddef.h index 9a28f7d9a334..111b097ec00b 100644 --- a/include/uapi/linux/stddef.h +++ b/include/uapi/linux/stddef.h @@ -72,6 +72,10 @@ #define __counted_by_be(m) #endif +#ifndef __counted_by_ptr +#define __counted_by_ptr(m) +#endif + #ifdef __KERNEL__ #define __kernel_nonstring __nonstring #else |