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Subject[PATCH] arm64: correct modules range of kernel virtual memory layout
Date
The commit f80fb3a3d508 ("arm64: add support for kernel ASLR")
moved module virtual address to
[module_alloc_base, module_alloc_base + MODULES_VSIZE).

Display module information of the virtual kernel
memory layout by using module_alloc_base.

testing output:
1) Current implementation:
Virtual kernel memory layout:
modules : 0xffffff8000000000 - 0xffffff8008000000 ( 128 MB)
2) this patch + KASLR:
Virtual kernel memory layout:
modules : 0xffffff8000560000 - 0xffffff8008560000 ( 128 MB)
3) this patch + KASLR and a dummy seed:
Virtual kernel memory layout:
modules : 0xffffffa7df637000 - 0xffffffa7e7637000 ( 128 MB)

Signed-off-by: Miles Chen <miles.chen@mediatek.com>
---
arch/arm64/mm/init.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index 5960bef..57a11d5 100644
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@ -52,6 +52,7 @@
#include <asm/sizes.h>
#include <asm/tlb.h>
#include <asm/alternative.h>
+#include <asm/module.h>

/*
* We need to be able to catch inadvertent references to memstart_addr
@@ -609,8 +610,8 @@ void __init mem_init(void)
pr_notice(" kasan : 0x%16lx - 0x%16lx (%6ld GB)\n",
MLG(KASAN_SHADOW_START, KASAN_SHADOW_END));
#endif
- pr_notice(" modules : 0x%16lx - 0x%16lx (%6ld MB)\n",
- MLM(MODULES_VADDR, MODULES_END));
+ pr_notice(" modules : 0x%16llx - 0x%16llx (%6lld MB)\n",
+ MLM(module_alloc_base, module_alloc_base + MODULES_VSIZE));
pr_notice(" vmalloc : 0x%16lx - 0x%16lx (%6ld GB)\n",
MLG(VMALLOC_START, VMALLOC_END));
pr_notice(" .text : 0x%p" " - 0x%p" " (%6ld KB)\n",
--
1.9.1
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