From: Tadeusz Struk <tadeusz.struk@xxxxxxxxxx> commit 55037ed7bdc62151a726f5685f88afa6a82959b1 upstream. Add include guard wrapper define to uapi/linux/stddef.h to prevent macro redefinition errors when stddef.h is included more than once. This was not needed before since the only contents already used a redefinition test. Signed-off-by: Tadeusz Struk <tadeusz.struk@xxxxxxxxxx> Link: https://lore.kernel.org/r/20220329171252.57279-1-tadeusz.struk@xxxxxxxxxx Fixes: 50d7bd38c3aa ("stddef: Introduce struct_group() helper macro") Cc: stable@xxxxxxxxxxxxxxx Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- include/uapi/linux/stddef.h | 4 ++++ 1 file changed, 4 insertions(+) --- a/include/uapi/linux/stddef.h +++ b/include/uapi/linux/stddef.h @@ -1,4 +1,7 @@ /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ +#ifndef _UAPI_LINUX_STDDEF_H +#define _UAPI_LINUX_STDDEF_H + #include <linux/compiler_types.h> #ifndef __always_inline @@ -25,3 +28,4 @@ struct { MEMBERS } ATTRS; \ struct TAG { MEMBERS } ATTRS NAME; \ } +#endif
