** Also affects: linux (Ubuntu Trusty)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu)
Status: In Progress => Fix Released
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https://bugs.launchpad.net/bugs/1798013
Title:
xattr length returned by vfs_getxattr() is not correct in Trusty
kernel
Status in ubuntu-kernel-tests:
In Progress
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Trusty:
New
Bug description:
== Justification ==
This issue has been addressed in bug 1789746 for other kernels
When the getxattr05 test in ubuntu_ltp_syscalls test suite, the test
will failed with:
tag=getxattr05 stime=1539663573
cmdline="getxattr05"
contacts=""
analysis=exit
<<<test_output>>>
incrementing stop
tst_test.c:1072: INFO: Timeout per run is 0h 05m 00s
getxattr05.c:85: PASS: Got same data when acquiring the value of
system.posix_acl_access twice
getxattr05.c:80: FAIL: Got different data(00 != ffffffff) at 16
getxattr05.c:85: PASS: Got same data when acquiring the value of
system.posix_acl_access twice
Summary:
passed 2
failed 1
skipped 0
warnings 0
This is caused by posix_acl_fix_xattr_to_user() being passed the total
buffer size and not the actual size of the xattr as returned by
vfs_getxattr().
== Fix ==
82c9a927bc5d ("getxattr: use correct xattr length")
A test kernel for Trusty could be found here:
http://people.canonical.com/~phlin/kernel/lp-1798013-getxattr05/
== Regression Potential ==
Low, this one-liner fix just passes the actual length of the xattr as
returned by vfs_getxattr() down.
== Test Case ==
Run the getxattr05 test in ubuntu_ltp_syscalls test suite. And it will pass
with the patched kernel.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-160-generic 3.13.0-160.210
ProcVersionSignature: User Name 3.13.0-160.210-generic 3.13.11-ckt39
Uname: Linux 3.13.0-160-generic x86_64
AlsaDevices:
total 0
crw-rw---- 1 root audio 116, 1 Oct 16 03:39 seq
crw-rw---- 1 root audio 116, 33 Oct 16 03:39 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.14.1-0ubuntu3.29
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq',
'/dev/snd/timer'] failed with exit code 1:
Date: Tue Oct 16 04:19:43 2018
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
MachineType: Intel Corporation S1200RP
PciMultimedia:
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-160-generic
root=UUID=b0d2ae4e-12dd-423e-acea-272ee8b2a893 ro console=ttyS0,115200n8
RelatedPackageVersions:
linux-restricted-modules-3.13.0-160-generic N/A
linux-backports-modules-3.13.0-160-generic N/A
linux-firmware 1.127.24
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/01/2015
dmi.bios.vendor: Intel Corp.
dmi.bios.version: S1200RP.86B.03.02.0003.070120151022
dmi.board.asset.tag: ....................
dmi.board.name: S1200RP
dmi.board.vendor: Intel Corporation
dmi.board.version: G62254-407
dmi.chassis.asset.tag: ....................
dmi.chassis.type: 17
dmi.chassis.vendor: ..............................
dmi.chassis.version: ..................
dmi.modalias:
dmi:bvnIntelCorp.:bvrS1200RP.86B.03.02.0003.070120151022:bd07/01/2015:svnIntelCorporation:pnS1200RP:pvr....................:rvnIntelCorporation:rnS1200RP:rvrG62254-407:cvn..............................:ct17:cvr..................:
dmi.product.name: S1200RP
dmi.product.version: ....................
dmi.sys.vendor: Intel Corporation
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