Commit c75be56e authored by Kees Cook's avatar Kees Cook Committed by Greg Kroah-Hartman
Browse files

lkdtm/bugs: Add ARRAY_BOUNDS to selftests 



Add CONFIG hints about why the ARRAY_BOUNDS test might fail, and
similarly include the CONFIGs needed to pass the ARRAY_BOUNDS test via
the selftests, and add to selftests.

Cc: kernelci@groups.io
Suggested-by: default avatarGuillaume Tucker <guillaume.tucker@collabora.com>
Signed-off-by: default avatarKees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20210818174855.2307828-2-keescook@chromium.org


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 09cbd1df

drivers/misc/lkdtm/bugs.c

+1 −0
Original line number Diff line number Diff line
@@ -267,6 +267,7 @@ void lkdtm_ARRAY_BOUNDS(void) 
	kfree(not_checked);

	kfree(checked);

	pr_err("FAIL: survived array bounds overflow!\n");

	pr_expected_config(CONFIG_UBSAN_BOUNDS);

}



void lkdtm_CORRUPT_LIST_ADD(void)

tools/testing/selftests/lkdtm/config

+2 −0
Original line number Diff line number Diff line
@@ -6,3 +6,5 @@ CONFIG_HARDENED_USERCOPY=y 
# CONFIG_HARDENED_USERCOPY_FALLBACK is not set

CONFIG_RANDOMIZE_KSTACK_OFFSET_DEFAULT=y

CONFIG_INIT_ON_ALLOC_DEFAULT_ON=y

CONFIG_UBSAN_BOUNDS=y

CONFIG_UBSAN_TRAP=y

tools/testing/selftests/lkdtm/tests.txt

+1 −0
Original line number Diff line number Diff line
@@ -7,6 +7,7 @@ EXCEPTION 
#EXHAUST_STACK Corrupts memory on failure

#CORRUPT_STACK Crashes entire system on success

#CORRUPT_STACK_STRONG Crashes entire system on success

ARRAY_BOUNDS

CORRUPT_LIST_ADD list_add corruption

CORRUPT_LIST_DEL list_del corruption

STACK_GUARD_PAGE_LEADING