[resend Patch v3 2/2] export the kernel image size KERNEL_IMAGE_SIZE

[Baoquan He]

Now kaslr makes kernel image size changable, not the fixed size 512M.
So KERNEL_IMAGE_SIZE need be exported to VMCOREINFO, otherwise makedumfile
will crash.

Signed-off-by: Baoquan He <bhe@xxxxxxxxxx>
Acked-by: Kees Cook <keescook@xxxxxxxxxxxx>
Acked-by: Vivek Goyal <vgoyal@xxxxxxxxxx>
---
 kernel/kexec.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/kernel/kexec.c b/kernel/kexec.c
index 2bee072..bd680d3 100644
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -2003,6 +2003,9 @@ static int __init crash_save_vmcoreinfo_init(void)
 #endif
 	VMCOREINFO_NUMBER(PG_head_mask);
 	VMCOREINFO_NUMBER(PAGE_BUDDY_MAPCOUNT_VALUE);
+#ifdef CONFIG_X86
+       VMCOREINFO_NUMBER(KERNEL_IMAGE_SIZE);
+#endif
 #ifdef CONFIG_HUGETLBFS
 	VMCOREINFO_SYMBOL(free_huge_page);
 #endif
-- 
1.8.5.3

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