[PATCH AUTOSEL 5.10 2/3] powerpc/kasan: Disable KCOV in KASAN code

Sasha Levin sashal at kernel.org
Thu Aug 3 23:04:44 AEST 2023

From: Benjamin Gray <bgray at 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 at csgroup.eu>
Signed-off-by: Benjamin Gray <bgray at linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe at ellerman.id.au>
Link: https://msgid.link/20230710044143.146840-1-bgray@linux.ibm.com
Signed-off-by: Sasha Levin <sashal at 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 bb1a5408b86b2..8636b17c6a20f 100644
--- a/arch/powerpc/mm/kasan/Makefile
+++ b/arch/powerpc/mm/kasan/Makefile
@@ -1,6 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 obj-$(CONFIG_PPC32)           += kasan_init_32.o
 obj-$(CONFIG_PPC_8xx)		+= 8xx.o

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