diff -Nur linux.old/mm/mmap.c linux.new/mm/mmap.c
--- linux.old/mm/mmap.c	2003-12-03 23:20:57.000000000 +0100
+++ linux.new/mm/mmap.c	2003-12-03 23:23:22.000000000 +0100
@@ -1059,8 +1059,12 @@
 	if (!len)
 		return addr;
 
-	if ((addr + len) > TASK_SIZE || (addr + len) < addr)
+	if ((addr + len) > TASK_SIZE || (addr + len) < addr) {
+		printk("do_brk: %d (%s): uid=%d euid=%d %08lx+%08lx\n",
+		       current->pid,current->comm,
+		       current->uid,current->euid,addr,len);
 		return -EINVAL;
+	}
 
 	/*
 	 * mlock MCL_FUTURE?