D16446.id45856.diff
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D16446.id45856.diff
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	Index: sys/dev/xen/grant_table/grant_table.c
	===================================================================
	--- sys/dev/xen/grant_table/grant_table.c
	+++ sys/dev/xen/grant_table/grant_table.c
	@@ -184,6 +184,10 @@
	{
	uint16_t flags, nflags;

	+ if (ref == GRANT_REF_INVALID) {
	+ return (0);
	+ }
	+
	nflags = shared[ref].flags;
	do {
	if ( (flags = nflags) & (GTF_reading\|GTF_writing) ) {
	@@ -349,8 +353,10 @@
	int ref, error;

	error = get_free_entries(count, &ref);
	- if (__predict_false(error))
	+ if (__predict_false(error)) {
	+ *head = GNTTAB_LIST_END;
	return (error);
	+ }

	*head = ref;
	return (0);