* [PATCH AUTOSEL 5.10 2/3] powerpc/kasan: Disable KCOV in KASAN code
[not found] <20230803130446.642038-1-sashal@kernel.org>
@ 2023-08-03 13:04 ` Sasha Levin
0 siblings, 0 replies; only message in thread
From: Sasha Levin @ 2023-08-03 13:04 UTC (permalink / raw)
To: linux-kernel, stable; +Cc: Sasha Levin, linuxppc-dev, Benjamin Gray
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 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
KASAN_SANITIZE := n
+KCOV_INSTRUMENT := n
obj-$(CONFIG_PPC32) += kasan_init_32.o
obj-$(CONFIG_PPC_8xx) += 8xx.o
--
2.40.1
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2023-08-03 13:04 ` [PATCH AUTOSEL 5.10 2/3] powerpc/kasan: Disable KCOV in KASAN code Sasha Levin
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