NULL pointer deference in set_nfsv4_acl_one

[Ricky Ramirez]

I can reliably reproduce an NFS BUG for set_nfsv4_acl_one by running `cp -a`. Both client and server are running in AWS EC2. The server mount is on EBS. This error is new since upgrading our nfs server from natty to precise.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-3.2.0-68-virtual 3.2.0-68.102
ProcVersionSignature: Ubuntu 3.2.0-68.102-virtual 3.2.62
Uname: Linux 3.2.0-68-virtual x86_64
AcpiTables:

AlsaDevices:
 total 0
 crw-rw---T 1 root audio 116, 1 Sep 18 17:02 seq
 crw-rw---T 1 root audio 116, 33 Sep 18 17:02 timer
AplayDevices: Error: [Errno 2] No such file or directory
ApportVersion: 2.0.1-0ubuntu17.7
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
Date: Thu Sep 18 17:38:20 2014
Ec2AMI: ami-d017b2b8
Ec2AMIManifest: (unknown)
Ec2AvailabilityZone: us-east-1d
Ec2InstanceType: m3.medium
Ec2Kernel: aki-919dcaf8
Ec2Ramdisk: unavailable
IwConfig:
 lo no wireless extensions.

 eth0 no wireless extensions.
Lspci:

Lsusb: Error: command ['lsusb'] failed with exit code 1: unable to initialize libusb: -99
MarkForUpload: True
PciMultimedia:

ProcFB:

ProcKernelCmdLine: root=LABEL=cloudimg-rootfs ro console=hvc0
RelatedPackageVersions:
 linux-restricted-modules-3.2.0-68-virtual N/A
 linux-backports-modules-3.2.0-68-virtual N/A
 linux-firmware 1.79.17
RfKill: Error: [Errno 2] No such file or directory
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)

[Ricky Ramirez (rram)]

The cp -a triggers the BUG when calling lsetxattr on the target.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.