yes:

	if((ulong)name < KZERO){
		validaddr((ulong)name, 1, 0);
		if(!dup)
			print("warning: validname called from %lux with user pointer", pc);
		p = name;
		t = BY2PG-((ulong)p&(BY2PG-1));
		while((ename=vmemchr(p, 0, t)) == nil){
->			p += t;
			t = BY2PG;
		}
	}else

when moving p to the start of the next page... it is not checked that this address is
valid as vmemchr() assumes the start address to be already checked, and it will
crash when vmemchr() touches it on the next round. vmemchr() will successive
check pages if the pointer to pointer + len span page boundries anyway so the
while is not really needed:

	name = aname;
	if((ulong)name < KZERO){
		validaddr((ulong)name, 1, 0);
		if(!dup)
			print("warning: validname called from %lux with user pointer", pc);
		ename = vmemchr(name, 0, (1<<16));
	}else

--
cinap