错误提示 BAD TRAP 请帮忙看一下出现了什么故障!

[weixin_38066147]

提供NFS服务的一台U5在登录界面放置一段时间后,出现如下提示,退到了ok状态,提示如下:
BAD TRAP: cpu=0 type=0x31 rp=0x2a10003f540 addr=0xab4080 mmu_fsr=0x0
BAD TRAP occurred in module "unix" due to an illegal access to a user address.
sched: trap type = 0x31
BAD TRAP: cpu=0 type=0x31 rp=0x2a10003eb40 addr=0x19 mmu_fsr = 0x0
BAD TRAP occurred in module "genunix" due to an NULL pointer dereference.
sched: trap type = 0x31
Fast Data Access MMU Miss
ok

请各位帮忙诊断一下,可能出现什么故障?