As per the generic KASAN code in mm/kasan, disable KCOV with KCOV_INSTRUMENT := n in the makefile.
This fixes a ppc64 boot hang when KCOV and KASAN are enabled. kasan_early_init() gets called before a PACA is initialised, but the KCOV hook expects a valid PACA. Suggested-by: Christophe Leroy <christophe.le...@csgroup.eu> Signed-off-by: Benjamin Gray <bg...@linux.ibm.com> --- The generic makefile has other disabled sanitisers / hooks, but this patch is just an upstream of fixing a blocking issue for running syzkaller. The blocker is resolved by this; kernels stop hanging on boot with KCOV + KASAN. This works as an alternative to https://patchwork.ozlabs.org/project/linuxppc-dev/patch/20230707013110.215693-1-bg...@linux.ibm.com/ --- arch/powerpc/mm/kasan/Makefile | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/powerpc/mm/kasan/Makefile b/arch/powerpc/mm/kasan/Makefile index 699eeffd9f55..f9522fd70b2f 100644 --- a/arch/powerpc/mm/kasan/Makefile +++ b/arch/powerpc/mm/kasan/Makefile @@ -1,6 +1,7 @@ # SPDX-License-Identifier: GPL-2.0 KASAN_SANITIZE := n +KCOV_INSTRUMENT := n obj-$(CONFIG_PPC32) += init_32.o obj-$(CONFIG_PPC_8xx) += 8xx.o -- 2.41.0
