D20580.id58466.diff
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D20580.id58466.diff
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	Index: head/sys/vm/vm_mmap.c
	===================================================================
	--- head/sys/vm/vm_mmap.c
	+++ head/sys/vm/vm_mmap.c
	@@ -257,7 +257,10 @@

	/* Adjust size for rounding (on both ends). */
	size += pageoff; /* low end... */
	- size = (vm_size_t) round_page(size); /* hi end */
	+ /* Check for rounding up to zero. */
	+ if (round_page(size) < size)
	+ return (EINVAL);
	+ size = round_page(size); /* hi end */

	/* Ensure alignment is at least a page and fits in a pointer. */
	align = flags & MAP_ALIGNMENT_MASK;