From: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>
Subject: include/linux/mm.h: fix typo in VM_MPX definition
There's a typo in recent change of VM_MPX definition. We want it to be
VM_HIGH_ARCH_4, not VM_HIGH_ARCH_BIT_4.
This bug does cause visible regressions. In arch_vma_name the vmflags
are tested against VM_MPX. With the incorrect value of VM_MPX, a
number of vmas (such as the stack) test positive and end up being
marked as [mpx] in /proc/N/maps instead of their correct names. This
confuses tools like rr which expect to be able to find familiar vmas.
Fixes: df3735c5b40f ("x86,mpx: make mpx depend on x86-64 to free up VMA flag")
Link: http://lkml.kernel.org/r/20170918140253.36856-1-kirill.shutemov@xxxxxxxxxxxxxxx
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Reviewed-by: Rik van Riel <riel@xxxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxx>
Cc: Kyle Huey <me@xxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> [4.14+]
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/mm.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN include/linux/mm.h~mm-fix-typo-in-vm_mpx-definition include/linux/mm.h
--- a/include/linux/mm.h~mm-fix-typo-in-vm_mpx-definition
+++ a/include/linux/mm.h
@@ -240,7 +240,7 @@ extern unsigned int kobjsize(const void
#if defined(CONFIG_X86_INTEL_MPX)
/* MPX specific bounds table or bounds directory */
-# define VM_MPX VM_HIGH_ARCH_BIT_4
+# define VM_MPX VM_HIGH_ARCH_4
#else
# define VM_MPX VM_NONE
#endif
_
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