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2018-09-04lkdtm: Add a test for STACKLEAKAlexander Popov1-0/+73
Introduce an lkdtm test for the STACKLEAK feature: check that the current task stack is properly erased (filled with STACKLEAK_POISON). Signed-off-by: Alexander Popov <alex.popov@linux.com> Signed-off-by: Tycho Andersen <tycho@tycho.ws> Tested-by: Laura Abbott <labbott@redhat.com> Signed-off-by: Kees Cook <keescook@chromium.org>