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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
Message-ID: <20200330022023.3691-6-yanaijie@huawei.com>
In-Reply-To: <20200330022023.3691-1-yanaijie@huawei.com>
References: <20200330022023.3691-1-yanaijie@huawei.com>
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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