On 01/25/2016, 02:00 PM, Dmitry Vyukov wrote: > --- a/scripts/Makefile.lib > +++ b/scripts/Makefile.lib > @@ -136,6 +136,12 @@ _c_flags += $(if $(patsubst n%,, \ > $(CFLAGS_UBSAN)) > endif > > +ifeq ($(CONFIG_KCOV),y) > +_c_flags += $(if $(patsubst n%,, \ > + $(KCOV_INSTRUMENT_$(basetarget).o)$(KCOV_INSTRUMENT)y), \ > + $(CFLAGS_KCOV))
Now that KCOV does not inherit KASAN's "n"s, I see link errors in efi lib with EFI_STUB: drivers/firmware/efi/libstub/lib.a(efi-stub-helper.o): In function `efi_printk': efi-stub-helper.c:(.text+0x13): undefined reference to `__sanitizer_cov_trace_pc' efi-stub-helper.c:(.text+0x31): undefined reference to `__sanitizer_cov_trace_pc' ... I fixed it by adding "KCOV_INSTRUMENT := n" to drivers/firmware/efi/libstub/Makefile thanks, -- js suse labs
