Commit bb540880 authored by Kees Cook's avatar Kees Cook
Browse files

stackinit: Keep selftest union size small on m68k 



The stack frame on m68k is very sensitive to the size of what needs to
be stored. Like done for long string testing, reduce the size of the
large trailing struct in the union initialization testing.

Reported-by: default avatarGeert Uytterhoeven <geert@linux-m68k.org>
Closes: https://lore.kernel.org/all/CAMuHMdXW8VbtOAixO7w+aDOG70aZtZ50j1Ybcr8B3eYnRUcrcA@mail.gmail.com
Fixes: e71a29db ("stackinit: Add union initialization to selftests")
Link: https://lore.kernel.org/r/20250204174509.work.711-kees@kernel.org


Signed-off-by: default avatarKees Cook <kees@kernel.org>
Tested-by: default avatarGeert Uytterhoeven <geert@linux-m68k.org>
parent dce4aab8

lib/stackinit_kunit.c

+3 −1
Original line number Diff line number Diff line
@@ -75,8 +75,10 @@ static bool stackinit_range_contains(char *haystack_start, size_t haystack_size, 
 */

#ifdef CONFIG_M68K

#define FILL_SIZE_STRING		8

#define FILL_SIZE_ARRAY			2

#else

#define FILL_SIZE_STRING		16

#define FILL_SIZE_ARRAY			8

#endif



#define INIT_CLONE_SCALAR		/**/
@@ -345,7 +347,7 @@ union test_small_start { 
	short three;

	unsigned long four;

	struct big_struct {

		unsigned long array[8];

		unsigned long array[FILL_SIZE_ARRAY];

	} big;

};