Commit 13479d52 authored May 20, 2005 by Jeff Dike Committed by Linus Torvalds May 20, 2005

[PATCH] uml: Page fault fixes



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 <jdike@addtoit.com>
Cc: <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

parent ba9950c8

arch/um/kernel/trap_kern.c

+4 −3

Original line number	Diff line number	Diff line
		@@ -57,10 +57,11 @@ int handle_page_fault(unsigned long address, unsigned long ip,
		*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)){