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[PATCH] uml: pte_mkread fix

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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@yahoo.it>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jeff Dike 2007-02-28 20:13:33 -08:00 committed by Linus Torvalds
parent 14251809b1
commit 1463fdbcc7
1 changed files with 1 additions and 1 deletions
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2
include/asm-um/pgtable.h
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@ -270,7 +270,7 @@ static inline pte_t pte_wrprotect(pte_t pte)
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));
}