lkdtm: Prevent the compiler from optimising lkdtm_CORRUPT_STACK()

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At least on powerpc with GCC 6, the compiler is smart enough to optimise
lkdtm_CORRUPT_STACK() into an empty function that just returns.

If we print the buffer after we've written to it that prevents the
compiler from optimising away data and the memset().

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Michael Ellerman 2016-11-15 18:02:32 +11:00 • committed by Greg Kroah-Hartman

parent 967b274e02

commit c55d240003

1 changed files with 2 additions and 1 deletions

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drivers/misc/lkdtm_bugs.c

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