Commit b45861ed authored by Kees Cook's avatar Kees Cook
Browse files

lkdtm/bugs: Switch from 1-element array to flexible array 



The testing for ARRAY_BOUNDS just wants an uninstrumented array,
and the proper flexible array definition is fine for that.

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: default avatarBill Wendling <morbo@google.com>
Signed-off-by: default avatarKees Cook <keescook@chromium.org>
parent 73919280

drivers/misc/lkdtm/bugs.c

+2 −2
Original line number Diff line number Diff line
@@ -309,7 +309,7 @@ static void lkdtm_OVERFLOW_UNSIGNED(void) 
struct array_bounds_flex_array {

	int one;

	int two;

	char data[1];

	char data[];

};



struct array_bounds {
@@ -341,7 +341,7 @@ static void lkdtm_ARRAY_BOUNDS(void) 
	 * For the uninstrumented flex array member, also touch 1 byte

	 * beyond to verify it is correctly uninstrumented.

	 */

	for (i = 0; i < sizeof(not_checked->data) + 1; i++)

	for (i = 0; i < 2; i++)

		not_checked->data[i] = 'A';



	pr_info("Array access beyond bounds ...\n");