[patch] correct vm_page_prot on stack pages

David Mosberger (davidm@napali.hpl.hp.com)
Wed, 9 Apr 2003 16:00:35 -0700


The patch below is needed to make it possible to map stack pages
without execution permission (as we do on ia64).

--david

diff -Nru a/fs/exec.c b/fs/exec.c
--- a/fs/exec.c Wed Apr 9 14:49:49 2003
+++ b/fs/exec.c Wed Apr 9 14:49:49 2003
@@ -407,7 +407,7 @@
mpnt->vm_start = PAGE_MASK & (unsigned long) bprm->p;
mpnt->vm_end = STACK_TOP;
#endif
- mpnt->vm_page_prot = PAGE_COPY;
+ mpnt->vm_page_prot = protection_map[VM_STACK_FLAGS & 0x7];
mpnt->vm_flags = VM_STACK_FLAGS;
mpnt->vm_ops = NULL;
mpnt->vm_pgoff = 0;
-
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