kernel-packages team mailing list archive

[dann frazier <dann.frazier@xxxxxxxxxxxxx>]

Diagnosing further, I've found that this happens when accessing a
certain file:

dannf@mustang:~$ ls -l /usr/bin/qemu-system-aarch64                                        
-rwxr-xr-x 1 root root 4998496 Mar 12 21:17 /usr/bin/qemu-system-aarch64
dannf@mustang:~$ ls -l /usr/lib/python2.7/six.pyc
[ 3586.472110] Unable to handle kernel paging request at virtual address 3ffffffffffffc
[ 3586.479819] pgd = ffffffc0fdebf000
[ 3586.483237] [3ffffffffffffc] *pgd=00000040fde7d003, *pud=00000040fde7d003, *pmd=0000000000000000
[ 3586.492027] Internal error: Oops: 96000004 [#13] SMP
[ 3586.496965] Modules linked in: xt_conntrack ipt_REJECT nf_reject_ipv4 ebtable_filter ebtables ip6t
[ 3586.539676] CPU: 5 PID: 1932 Comm: ls Tainted: G      D        3.19.0-12-generic #12-Ubuntu
[ 3586.547982] Hardware name: APM X-Gene Mustang board (DT)
[ 3586.553266] task: ffffffc3e8a38c40 ti: ffffffc0fc68c000 task.ti: ffffffc0fc68c000
[ 3586.560712] PC is at __d_lookup_rcu+0x80/0x17c
[ 3586.565133] LR is at lookup_fast+0x4c/0x2f0
[ 3586.569293] pc : [<ffffffc000229eec>] lr : [<ffffffc00021ce68>] pstate: 00000145
[ 3586.576648] sp : ffffffc0fc68fb40
[ 3586.579942] x29: ffffffc0fc68fb40 x28: ffffffc0fc68c000 
[ 3586.585245] x27: ffffffffffffffff x26: 0000000000000007 
[ 3586.590546] x25: ffffffc3ed26a033 x24: ffffffc0fc68fd20 
[ 3586.595848] x23: 0000000725cabf8e x22: ffffffc0fc68fbfc 
[ 3586.601150] x21: ffffffc3ed53b780 x20: 003ffffffffffff8 
[ 3586.606451] x19: 0040000000000000 x18: 0000000000000000 
[ 3586.611754] x17: 00000000004292d0 x16: ffffffc000215d3c 
[ 3586.617057] x15: ffffffffffffffff x14: 0000007faf35c16c 
[ 3586.622360] x13: ffffffffffffffff x12: 0000000000000010 
[ 3586.627662] x11: 0000000000000000 x10: fefefefefefefeff 
[ 3586.632965] x9 : 0000007fca1ade6c x8 : 535f474458006379 
[ 3586.638268] x7 : 0000000000000000 x6 : 0000000000000020 
[ 3586.643571] x5 : 0000000000000000 x4 : ffffffc000b64f60 
[ 3586.648872] x3 : 0000000000000015 x2 : ffffffc3eec00000 
[ 3586.654174] x1 : 000000000000000b x0 : 00000000001ed681 
[ 3586.659475] 
[ 3586.660956] Process ls (pid: 1932, stack limit = 0xffffffc0fc68c058)
[ 3586.667275] Stack: (0xffffffc0fc68fb40 to 0xffffffc0fc690000)
[ 3586.672991] fb40: fc68fba0 ffffffc0 0021ce68 ffffffc0 fc68fd10 ffffffc0 00000000 00000000
[ 3586.681126] fb60: fc68fc70 ffffffc0 fc68fc60 ffffffc0 dfa06020 ffffffc3 ed53b780 ffffffc3
[ 3586.689260] fb80: 0000011a 00000000 0000004f 00000000 00b6e000 ffffffc0 c3e4c240 ffffffbe
[ 3586.697395] fba0: fc68fc00 ffffffc0 0021f578 ffffffc0 fc68fd10 ffffffc0 00000000 00000000
[ 3586.705529] fbc0: 00000040 00000000 ed26a020 ffffffc3 ffffff9c 00000000 00000015 00000000
[ 3586.713663] fbe0: 0000011a 00000000 ed26a020 ffffffc3 ffffff9c 00000000 000994ec ffffffc0
[ 3586.721798] fc00: fc68fc90 ffffffc0 0021fbe4 ffffffc0 ed26a000 ffffffc3 fc68fd10 ffffffc0
[ 3586.729932] fc20: ed26a000 ffffffc3 00000000 00000000 ffffff9c 00000000 00000015 00000000
[ 3586.738066] fc40: 0000011a 00000000 0000004f 00000000 00b6e000 ffffffc0 ca1ade4c 0000007f
[ 3586.746201] fc60: 00000000 00000000 00000000 00000000 fc68fe20 ffffffc0 00000015 00000000
[ 3586.754335] fc80: fc68fcd0 ffffffc0 0022133c ffffffc0 fc68fcd0 ffffffc0 00221360 ffffffc0
[ 3586.762469] fca0: ed26a000 ffffffc3 00000000 00000000 00000000 00000000 ffffff9c 00000000
[ 3586.770604] fcc0: fc68fe20 ffffffc0 00b6fc10 ffffffc0 fc68fdb0 ffffffc0 002213f0 ffffffc0
[ 3586.778738] fce0: ffffff9c 00000000 ca1ade4c 0000007f 00000000 00000000 fc68fe20 ffffffc0
[ 3586.786872] fd00: fc68fe68 ffffffc0 00129750 ffffffc0 dfa06020 ffffffc3 ed53b780 ffffffc3
[ 3586.795007] fd20: 25cabf8e 00000007 ed26a033 ffffffc3 dfa06020 ffffffc3 ed5da180 ffffffc3
[ 3586.803141] fd40: ff659c88 ffffffc0 00000040 00000002 00000536 00000000 00000000 00000000
[ 3586.811275] fd60: 00000000 00000000 0012a07c ffffffc0 00000001 00000000 00000000 00000000
[ 3586.819410] fd80: 00000081 00000000 af49e770 0000007f 7fffffff 00000000 00000003 00000000
[ 3586.827544] fda0: 00000000 00000000 00000062 00000000 fc68fde0 ffffffc0 002157b0 ffffffc0
[ 3586.835678] fdc0: 00000000 00000000 00000000 00000000 ffffff9c 00000000 ca1ade4c 0000007f
[ 3586.843813] fde0: fc68fe30 ffffffc0 00215d78 ffffffc0 ffffff9c ffffffff ca1ade4c 0000007f
[ 3586.851947] fe00: 00000100 00000000 22811c90 00000000 80000000 00000000 001d468c ffffffff
[ 3586.860081] fe20: ca1ad0a0 0000007f 0008609c ffffffc0 ca1ace20 0000007f 000863f0 ffffffc0
[ 3586.868216] fe40: 00000000 00000000 22811c90 00000000 ffffffff ffffffff af41614c 0000007f
[ 3586.876350] fe60: ca1ace00 0000007f 000863f0 ffffffc0 00000000 00000000 af37c140 0000007f
[ 3586.884484] fe80: ffffffff ffffffff af2aa05c 0000007f 20000000 00000000 00000015 00000000
[ 3586.892619] fea0: 0000011a 00000000 00000062 00000000 ca1acc90 0000007f 000863f0 ffffffc0
[ 3586.900753] fec0: 00000000 00000000 00000015 00000000 ffffff9c ffffffff ca1ade4c 0000007f
[ 3586.908887] fee0: 22811c90 00000000 00000100 00000000 00000000 00000000 00000000 00000000
[ 3586.917022] ff00: ca1ad09c 0000007f 656f7277 3a2f2f1f 0000004f 00000000 22811c70 00000000
[ 3586.925156] ff20: 01010101 01010101 00000009 00000000 00000010 00000000 ffffffff ffffffff
[ 3586.933290] ff40: af35c16c 0000007f ffffffff ffffffff af416138 0000007f 004292d0 00000000
[ 3586.941425] ff60: 00000000 00000000 22811c80 00000000 22811c90 00000000 00000000 00000000
[ 3586.949559] ff80: 00429000 00000000 00429000 00000000 ca1ade4c 0000007f 00000001 00000000
[ 3586.957693] ffa0: ca1ade4c 0000007f 00000002 00000000 00000000 00000000 ca1ace20 0000007f
[ 3586.965828] ffc0: 00409264 00000000 ca1ace20 0000007f af41614c 0000007f 80000000 00000000
[ 3586.973962] ffe0: ffffff9c ffffffff 0000004f 00000000 00000000 00000000 00000000 00000000
[ 3586.982095] Call trace:
[ 3586.984528] [<ffffffc000229eec>] __d_lookup_rcu+0x80/0x17c
[ 3586.989984] [<ffffffc00021ce64>] lookup_fast+0x48/0x2f0
[ 3586.995180] [<ffffffc00021f574>] path_lookupat+0xdc/0x70c
[ 3587.000550] [<ffffffc00021fbe0>] filename_lookup+0x3c/0xec
[ 3587.006006] [<ffffffc00022135c>] user_path_at_empty+0x60/0xb4
[ 3587.011722] [<ffffffc0002213ec>] user_path_at+0x3c/0x50
[ 3587.016920] [<ffffffc0002157ac>] vfs_fstatat+0x64/0xbc
[ 3587.022029] [<ffffffc000215d74>] SyS_newfstatat+0x38/0x60
[ 3587.027400] Code: 54000160 d360fefa 9280001b d1002274 (b85fc262) 
[ 3587.033478] ---[ end trace 8500912aad83ddd4 ]---
Segmentation fault
dannf@mustang:~$

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https://bugs.launchpad.net/bugs/1440536

Title:
  Oops __d_lookup+0x88/0x194

Status in The Linux Kernel:
  New
Status in linux package in Ubuntu:
  Incomplete
Status in linux source package in Vivid:
  Incomplete

Bug description:
  This started happening on a Mustang board after upgrading to
  3.19.0-9.9 and persists in 3.19.0-11.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-image-3.19.0-11-generic 3.19.0-11.11
  ProcVersionSignature: Ubuntu 3.19.0-11.11-generic 3.19.3
  Uname: Linux 3.19.0-11-generic aarch64
  AlsaDevices:
   total 0
   crw-rw---- 1 root audio 116,  1 Dec 31  1969 seq
   crw-rw---- 1 root audio 116, 33 Dec 31  1969 timer
  AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
  ApportVersion: 2.17-0ubuntu1
  Architecture: arm64
  ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/timer', '/dev/snd/seq'] failed with exit code 1:
  CRDA: Error: [Errno 2] No such file or directory: 'iw'
  Date: Sun Apr  5 08:32:28 2015
  HibernationDevice: RESUME=UUID=014663f6-5135-4075-bf04-d2f42c4fc90b
  IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
  Lsusb: Error: command ['lsusb'] failed with exit code 1: unable to initialize libusb: -99
  PciMultimedia:
   
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB:
   
  ProcKernelCmdLine: console=ttyS0,115200n8 ro earlyprintk=uart8250-32bit,0x1c020000
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-11-generic N/A
   linux-backports-modules-3.19.0-11-generic  N/A
   linux-firmware                             1.143
  RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
  SourcePackage: linux
  SystemImageInfo:
   current build number: 0
   device name: ?
   channel: daily
   last update: Unknown
  UpgradeStatus: No upgrade log present (probably fresh install)

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