The stackleak_erase() function is called on the trampoline stack at the end of syscall. This stack is not big enough for ftrace operations, e.g. it can be overflowed if we enable kprobe_events for stackleak_erase().
Let's disable ftrace for stackleak.c to avoid such situations. Reported-by: kernel test robot <l...@intel.com> Signed-off-by: Alexander Popov <alex.po...@linux.com> Reviewed-by: Kees Cook <keesc...@chromium.org> --- kernel/Makefile | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/Makefile b/kernel/Makefile index 7343b3a..0906f6d 100644 --- a/kernel/Makefile +++ b/kernel/Makefile @@ -18,6 +18,7 @@ obj-$(CONFIG_MULTIUSER) += groups.o ifdef CONFIG_FUNCTION_TRACER # Do not trace internal ftrace files CFLAGS_REMOVE_irq_work.o = $(CC_FLAGS_FTRACE) +CFLAGS_REMOVE_stackleak.o = $(CC_FLAGS_FTRACE) endif # Prevents flicker of uninteresting __do_softirq()/__local_bh_disable_ip() -- 2.7.4
