r0 = syz_open_procfs$namespace(0xffffffffffffffff, &(0x7f00000014c0)='ns/pid_for_children\x00')
fsetxattr(r0, &(0x7f0000001500)=@known='trusted.overlay.upper\x00', &(0x7f0000001540)='.\x00', 0x2, 0x0)