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Date: Wed, 5 Feb 2020 10:55:26 +0800
From: Jason Yan <yanaijie@...wei.com>
To: <mpe@...erman.id.au>, <linuxppc-dev@...ts.ozlabs.org>,
<diana.craciun@....com>, <christophe.leroy@....fr>,
<benh@...nel.crashing.org>, <paulus@...ba.org>, <npiggin@...il.com>,
<keescook@...omium.org>, <kernel-hardening@...ts.openwall.com>,
<oss@...error.net>
CC: <linux-kernel@...r.kernel.org>, <zhaohongjiang@...wei.com>, Jason Yan
<yanaijie@...wei.com>
Subject: [PATCH v2 5/6] powerpc/fsl_booke/64: clear the original kernel if randomized
The original kernel still exists in the memory, clear it now.
Signed-off-by: Jason Yan <yanaijie@...wei.com>
Cc: Scott Wood <oss@...error.net>
Cc: Diana Craciun <diana.craciun@....com>
Cc: Michael Ellerman <mpe@...erman.id.au>
Cc: Christophe Leroy <christophe.leroy@....fr>
Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Nicholas Piggin <npiggin@...il.com>
Cc: Kees Cook <keescook@...omium.org>
---
arch/powerpc/mm/nohash/kaslr_booke.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/mm/nohash/kaslr_booke.c b/arch/powerpc/mm/nohash/kaslr_booke.c
index c6f5c1db1394..ed1277059368 100644
--- a/arch/powerpc/mm/nohash/kaslr_booke.c
+++ b/arch/powerpc/mm/nohash/kaslr_booke.c
@@ -378,8 +378,10 @@ notrace void __init kaslr_early_init(void *dt_ptr, phys_addr_t size)
unsigned int *__kaslr_offset = (unsigned int *)(KERNELBASE + 0x58);
unsigned int *__run_at_load = (unsigned int *)(KERNELBASE + 0x5c);
- if (*__run_at_load == 1)
+ if (*__run_at_load == 1) {
+ kaslr_late_init();
return;
+ }
/* Setup flat device-tree pointer */
initial_boot_params = dt_ptr;
--
2.17.2
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