From: Jason Yan <yanaijie@huawei.com>
To: <mpe@ellerman.id.au>, <linuxppc-dev@lists.ozlabs.org>,
<diana.craciun@nxp.com>, <christophe.leroy@c-s.fr>,
<benh@kernel.crashing.org>, <paulus@samba.org>,
<npiggin@gmail.com>, <keescook@chromium.org>,
<kernel-hardening@lists.openwall.com>, <oss@buserror.net>
Cc: <linux-kernel@vger.kernel.org>, <zhaohongjiang@huawei.com>,
<dja@axtens.net>, Jason Yan <yanaijie@huawei.com>
Subject: [PATCH v5 5/6] powerpc/fsl_booke/64: clear the original kernel if randomized
Date: Mon, 30 Mar 2020 10:20:22 +0800 [thread overview]
Message-ID: <20200330022023.3691-6-yanaijie@huawei.com> (raw)
In-Reply-To: <20200330022023.3691-1-yanaijie@huawei.com>
The original kernel still exists in the memory, clear it now.
Signed-off-by: Jason Yan <yanaijie@huawei.com>
Cc: Scott Wood <oss@buserror.net>
Cc: Diana Craciun <diana.craciun@nxp.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Christophe Leroy <christophe.leroy@c-s.fr>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Kees Cook <keescook@chromium.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 24ad34641869..6c46f24cc53d 100644
--- a/arch/powerpc/mm/nohash/kaslr_booke.c
+++ b/arch/powerpc/mm/nohash/kaslr_booke.c
@@ -382,8 +382,10 @@ notrace void __init kaslr_early_init(void *dt_ptr, phys_addr_t size)
unsigned long kernel_sz;
if (IS_ENABLED(CONFIG_PPC64)) {
- if (__run_at_load == 1)
+ if (__run_at_load == 1) {
+ kaslr_late_init();
return;
+ }
/* Get the first memblock size */
early_get_first_memblock_info(dt_ptr, &size);
--
2.17.2
next prev parent reply other threads:[~2020-03-30 2:22 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-30 2:20 [PATCH v5 0/6] implement KASLR for powerpc/fsl_booke/64 Jason Yan
2020-03-30 2:20 ` [PATCH v5 1/6] powerpc/fsl_booke/kaslr: refactor kaslr_legal_offset() and kaslr_early_init() Jason Yan
2020-03-30 2:20 ` [PATCH v5 2/6] powerpc/fsl_booke/64: introduce reloc_kernel_entry() helper Jason Yan
2020-03-30 2:20 ` [PATCH v5 3/6] powerpc/fsl_booke/64: implement KASLR for fsl_booke64 Jason Yan
2020-03-30 2:20 ` [PATCH v5 4/6] powerpc/fsl_booke/64: do not clear the BSS for the second pass Jason Yan
2020-03-30 2:20 ` Jason Yan [this message]
2020-03-30 2:20 ` [PATCH v5 6/6] powerpc/fsl_booke/kaslr: rename kaslr-booke32.rst to kaslr-booke.rst and add 64bit part Jason Yan
2020-04-13 1:23 ` [PATCH v5 0/6] implement KASLR for powerpc/fsl_booke/64 Jason Yan
2020-04-15 19:31 ` Scott Wood
2020-04-23 1:11 ` Jason Yan
2020-04-24 17:17 ` Daniel Axtens
2020-04-26 3:56 ` Jason Yan
2020-04-27 13:34 ` Daniel Axtens
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