5.4-stable review patch. If anyone has any objections, please let me know.
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From: Benjamin Gray bgray@linux.ibm.com
[ Upstream commit ccb381e1af1ace292153c88eb1fffa5683d16a20 ]
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.leroy@csgroup.eu Signed-off-by: Benjamin Gray bgray@linux.ibm.com Signed-off-by: Michael Ellerman mpe@ellerman.id.au Link: https://msgid.link/20230710044143.146840-1-bgray@linux.ibm.com Signed-off-by: Sasha Levin sashal@kernel.org --- 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 6577897673dda..22f1a7c3f4362 100644 --- a/arch/powerpc/mm/kasan/Makefile +++ b/arch/powerpc/mm/kasan/Makefile @@ -1,5 +1,6 @@ # SPDX-License-Identifier: GPL-2.0
KASAN_SANITIZE := n +KCOV_INSTRUMENT := n
obj-$(CONFIG_PPC32) += kasan_init_32.o