Any access to a PROT_NONE page should segfault the process. A JVM seems to
do this on purpose. Also, Al noticed some bogus code, which is now deleted.
Signed-off-by: Jeff Dike <[email protected]>
Index: linux-2.6.12-rc/arch/um/kernel/trap_kern.c
===================================================================
--- linux-2.6.12-rc.orig/arch/um/kernel/trap_kern.c 2005-05-17 16:34:45.000000000 -0400
+++ linux-2.6.12-rc/arch/um/kernel/trap_kern.c 2005-05-17 18:03:10.000000000 -0400
@@ -57,10 +57,11 @@ int handle_page_fault(unsigned long addr
*code_out = SEGV_ACCERR;
if(is_write && !(vma->vm_flags & VM_WRITE))
goto out;
+
+ if(!(vma->vm_flags & (VM_READ | VM_EXEC)))
+ goto out;
+
page = address & PAGE_MASK;
- pgd = pgd_offset(mm, page);
- pud = pud_offset(pgd, page);
- pmd = pmd_offset(pud, page);
do {
survive:
switch (handle_mm_fault(mm, vma, address, is_write)){
-
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