The patch titled
uml: pte_mkread fix
has been added to the -mm tree. Its filename is
uml-pte_mkread-fix.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: uml: pte_mkread fix
From: Jeff Dike <jdike@xxxxxxxxxxx>
Fix the fact that pte_mkread set _PAGE_RW instead of _PAGE_USER (the logic is
copied from i386 in most place, so it is really as bad as you're thinking).
Thus currently page tables are more permissive than they should.
Such a change may trigger other latent bugs, so be careful with this.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@xxxxxxxx>
Signed-off-by: Jeff Dike <jdike@xxxxxxxxxxx>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@xxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/asm-um/pgtable.h | 2 +-
1 files changed, 1 insertion(+), 1 deletion(-)
diff -puN include/asm-um/pgtable.h~uml-pte_mkread-fix include/asm-um/pgtable.h
--- a/include/asm-um/pgtable.h~uml-pte_mkread-fix
+++ a/include/asm-um/pgtable.h
@@ -270,7 +270,7 @@ static inline pte_t pte_wrprotect(pte_t
static inline pte_t pte_mkread(pte_t pte)
{
- pte_set_bits(pte, _PAGE_RW);
+ pte_set_bits(pte, _PAGE_USER);
return(pte_mknewprot(pte));
}
_
Patches currently in -mm which might be from jdike@xxxxxxxxxxx are
uml-enable-raw.patch
uml-host-vdso-fix.patch
uml-pte_mkread-fix.patch
uml-fix-prototypes.patch
-
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