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Subject[PATCH 6/6] arm/mm/ptdump:Add address markers for KASAN regions
Date
From: Hailong Liu <liu.hailong6@zte.com.cn>

ARM has recently supported KASAN, so I think that it's time to add KASAN
regions for PTDUMP on ARM.

I have tested this patch with QEMU + vexpress-a15. Both CONFIG_ARM_LPAE
and no CONFIG_ARM_LPAE.

The result after patching looks like this:
1 CONFIG_ARM_LPAE=y
---[ Kasan shadow start ]---
0x6ee00000-0x7af00000 193M RW NX SHD MEM/CACHED/WBWA
0x7b000000-0x7f000000 64M ro NX SHD MEM/CACHED/WBWA
---[ Kasan shadow end ]---
---[ Modules ]---
---[ Kernel Mapping ]---
......
---[ vmalloc() Area ]---
......
---[ vmalloc() End ]---
---[ Fixmap Area ]---
---[ Vectors ]---
......
---[ Vectors End ]---

Signed-off-by: Hailong Liu <liu.hailong6@zte.com.cn>
---
arch/arm/mm/dump.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mm/dump.c b/arch/arm/mm/dump.c
index c18d23a5e5f1..93ff0097f00b 100644
--- a/arch/arm/mm/dump.c
+++ b/arch/arm/mm/dump.c
@@ -19,6 +19,10 @@
#include <asm/ptdump.h>

static struct addr_marker address_markers[] = {
+#ifdef CONFIG_KASAN
+ { KASAN_SHADOW_START, "Kasan shadow start"},
+ { KASAN_SHADOW_END, "Kasan shadow end"},
+#endif
{ MODULES_VADDR, "Modules" },
{ PAGE_OFFSET, "Kernel Mapping" },
{ 0, "vmalloc() Area" },
@@ -429,8 +433,11 @@ static void ptdump_initialize(void)
if (pg_level[i].bits[j].nx_bit)
pg_level[i].nx_bit = &pg_level[i].bits[j];
}
-
+#ifdef CONFIG_KASAN
+ address_markers[4].start_address = VMALLOC_START;
+#else
address_markers[2].start_address = VMALLOC_START;
+#endif
}

static struct ptdump_info kernel_ptdump_info = {
--
2.17.1
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