powerpc/mm/hash: Fix get_region_id() for invalid addresses

[platform/kernel/linux-starfive.git] / arch / powerpc / include / asm / book3s / 64 / hash.h

diff --git a/arch/powerpc/include/asm/book3s/64/hash.h b/arch/powerpc/include/asm/book3s/64/hash.h
index 5486087..2781ebf 100644 (file)
--- a/arch/powerpc/include/asm/book3s/64/hash.h
+++ b/arch/powerpc/include/asm/book3s/64/hash.h
@@ -93,6 +93,7 @@
 #define VMALLOC_REGION_ID      NON_LINEAR_REGION_ID(H_VMALLOC_START)
 #define IO_REGION_ID           NON_LINEAR_REGION_ID(H_KERN_IO_START)
 #define VMEMMAP_REGION_ID      NON_LINEAR_REGION_ID(H_VMEMMAP_START)
+#define INVALID_REGION_ID      (VMEMMAP_REGION_ID + 1)
 
 /*
  * Defines the address of the vmemap area, in its own region on
@@ -119,6 +120,9 @@ static inline int get_region_id(unsigned long ea)
        if (id == 0)
                return USER_REGION_ID;
 
+       if (id != (PAGE_OFFSET >> 60))
+               return INVALID_REGION_ID;
+
        if (ea < H_KERN_VIRT_START)
                return LINEAR_MAP_REGION_ID;