[NFSv4.1] 6ae373394c4: kernel boot crash

[Fengguang Wu]

Hi Trond,

We noticed the below kernel crash on

git://git.linux-nfs.org/projects/trondmy/linux-nfs.git testing
commit 6ae373394c4257bad562817aa60464ff7fe8f9c4 ("NFSv4.1: Ask for no delegation on OPEN if using O_DIRECT")


testbox/testcase/testparams: vm-vp-quantal-x86_64/boot/1

0e3b137fbf0f4ab9  6ae373394c4257bad562817aa6  
----------------  --------------------------  
       fail:runs  %reproduction    fail:runs
           |             |             |    
           :100          4%           2:46    dmesg.BUG:kernel_test_crashed

The last dmesg lines before the kernel crash are

[    0.274266] NET: Registered protocol family 1
[    0.275236] RPC: Registered named UNIX socket transport module.
[    0.276123] RPC: Registered udp transport module.
[    0.276860] RPC: Registered tcp transport module.
[    0.277617] RPC: Registered tcp NFSv4.1 backchannel transport module

Thanks,
Fengguang
---
testcase: boot
default-monitors: 
default_watchdogs:
  watch-oom: 
  watchdog: 
cpufreq_governor: 
model: qemu-system-x86_64 -enable-kvm
nr_vm: 64
nr_cpu: 2
memory: 360M
rootfs: quantal-core-x86_64.cgz
boot-slabinfo: 
boot-meminfo: 
memmap: 
boot-memory: 
boot-time: 
kernel-size: 
sleep: 1
branch: nfs/linux-next
commit: 6ae373394c4257bad562817aa60464ff7fe8f9c4
repeat_to: 2
testbox: vm-vp-quantal-x86_64-3
tbox_group: vm-vp-quantal-x86_64
kconfig: x86_64-rhel
enqueue_time: 2015-02-05 18:54:42.323364417 +08:00
kernel: "/kernel/x86_64-rhel/6ae373394c4257bad562817aa60464ff7fe8f9c4/vmlinuz-3.19.0-rc5-g6ae3733"
user: lkp
queue: rand
result_root: "/result/vm-vp-quantal-x86_64/boot/1/quantal-core-x86_64.cgz/x86_64-rhel/6ae373394c4257bad562817aa60464ff7fe8f9c4/0"
job_file: "/lkp/scheduled/vm-vp-quantal-x86_64-3/rand_boot-1-quantal-core-x86_64.cgz-x86_64-rhel-6ae373394c4257bad562817aa60464ff7fe8f9c4-1.yaml"
dequeue_time: 2015-02-05 18:55:49.602324841 +08:00
job_state: finished