Re: mremap vulnerability patch for WOLK

Bah, I noticed that my clock was adrift when I sent the last message ...
here's the patch again just in case anyone would otherwise miss it:

--- linux/mm/mremap.c.orig      2004-01-05 17:01:21.382104120 +0000
+++ linux/mm/mremap.c   2004-01-05 17:15:25.689749848 +0000
@@ -315,6 +315,10 @@
        old_len = PAGE_ALIGN(old_len);
        new_len = PAGE_ALIGN(new_len);

+       /* Don't allow the degenerate cases */
+       if (!(old_len | new_len))
+               goto out;
+
        /* new_addr is only valid if MREMAP_FIXED is specified */
        if (flags & MREMAP_FIXED) {
                if (new_addr & ~PAGE_MASK)

--Kerin Millar


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