BUG: unable to handle kernel NULL pointer dereference at (null); RIP: 0010:[<0000000000000000>] [< (null)>] (null)
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
samba |
Confirmed
|
Medium
|
|||
linux (Ubuntu) |
Incomplete
|
Medium
|
Unassigned |
Bug Description
When entering a dfs referral in the DFS root tree, I cannot follow the referral to the next server. I get either a "Permission denied" error or an "Object is remote" error.
if I cd to a non-existent folder I get a kernel oops:
username@
username@
ls: cannot open directory .: Permission denied
username@
Ticket cache: FILE:/tmp/
Default principal: <email address hidden>
Valid starting Expires Service principal
09/10/12 17:18:34 10/10/12 03:18:35 <email address hidden>
renew until 16/10/12 17:18:34
09/10/12 17:18:35 10/10/12 03:18:35 COMP12345$
renew until 16/10/12 17:18:34
09/10/12 17:19:13 10/10/12 03:18:35 <email address hidden>
renew until 16/10/12 17:18:34
username@
[ 214.095043] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 214.095106] IP: [< (null)>] (null)
[ 214.095139] PGD 1061bc067 PUD 1061bb067 PMD 0
[ 214.095177] Oops: 0010 [#1] SMP
[ 214.095204] CPU 1
[ 214.095218] Modules linked in: arc4 nls_utf8 cifs autofs4 rfcomm bnep bluetooth snd_hda_
[ 214.095573]
[ 214.095586] Pid: 1969, comm: bash Not tainted 3.2.0-31-generic #50-Ubuntu Dell Inc. OptiPlex 380 /01TKCC
[ 214.095656] RIP: 0010:[<
[ 214.095702] RSP: 0018:ffff880106
[ 214.095734] RAX: ffffffffa0409000 RBX: ffff880036b3b3c0 RCX: 0000000000000000
[ 214.095775] RDX: ffff88010614fe78 RSI: ffff880036b3b3c0 RDI: ffff880106e90070
[ 214.095816] RBP: ffff88010614fd08 R08: ffff88012bc56ec0 R09: 0000000000000005
[ 214.095857] R10: 0000000000000000 R11: 0000000000000005 R12: ffff880106e90070
[ 214.095899] R13: ffff88010614fe78 R14: 0000000000000001 R15: ffff88010614fdf0
[ 214.095941] FS: 00007f6da7fdc70
[ 214.095988] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 214.096022] CR2: 0000000000000000 CR3: 00000001061b9000 CR4: 00000000000406e0
[ 214.096063] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 214.096105] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 214.096146] Process bash (pid: 1969, threadinfo ffff88010614e000, task ffff88011107ae00)
[ 214.096192] Stack:
[ 214.096206] ffffffff81182b15 ffff88010614fd08 ffffffff81190235 ffff88010614fd08
[ 214.096260] ffff88010614fe78 ffff88010614fdc8 0000000000000000 ffff88010614fd88
[ 214.096313] ffffffff81184ca2 ffff88010614fd28 ffffffff00000001 ffff880106e90110
[ 214.096366] Call Trace:
[ 214.096387] [<ffffffff81182
[ 214.096426] [<ffffffff81190
[ 214.096458] [<ffffffff81184
[ 214.096490] [<ffffffff81186
[ 214.096524] [<ffffffff81187
[ 214.096563] [<ffffffff81319
[ 214.096600] [<ffffffff81187
[ 214.098792] [<ffffffff81187
[ 214.099014] [<ffffffff8117c
[ 214.099014] [<ffffffff8117c
[ 214.099014] [<ffffffff81187
[ 214.099014] [<ffffffff81176
[ 214.099014] [<ffffffff81662
[ 214.099014] Code: Bad RIP value.
[ 214.099014] RIP [< (null)>] (null)
[ 214.099014] RSP <ffff88010614fcd0>
[ 214.099014] CR2: 0000000000000000
[ 214.140115] ---[ end trace 563b8616dd09caad ]---
I mount the DFS root from the fstab:
//domain.
Note due issues in netapp, kerberos and samba, the oldest Ubuntu kernel regression tested to is 3.2.0-2-generic: mount works, but bug present.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-
ProcVersionSign
Uname: Linux 3.2.0-31-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
AplayDevices:
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC269VB Analog [ALC269VB Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
ApportVersion: 2.0.1-0ubuntu13
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xfe6fc000 irq 42'
Mixer name : 'Realtek ALC269VB'
Components : 'HDA:10ec0269,
Controls : 26
Simple ctrls : 14
Date: Tue Oct 9 17:37:30 2012
HibernationDevice: RESUME=
IwConfig:
lo no wireless extensions.
eth0 no wireless extensions.
MachineType: Dell Inc. OptiPlex 380
ProcEnviron:
LANGUAGE=en_IE:
TERM=xterm
PATH=(custom, no user)
LANG=en_IE.UTF-8
SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
RelatedPackageV
linux-
linux-
linux-firmware 1.79.1
RfKill:
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/11/2010
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A01
dmi.board.name: 01TKCC
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.
dmi.chassis.type: 15
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.
dmi.product.name: OptiPlex 380
dmi.sys.vendor: Dell Inc.
Changed in linux (Ubuntu): | |
status: | New → Confirmed |
tags: | added: kernel-bug-exists-upstream-v3.7-rc2-raring |
Changed in linux (Ubuntu): | |
status: | Incomplete → Triaged |
Changed in samba: | |
importance: | Unknown → Medium |
status: | Unknown → Confirmed |
FYI:
The DFS root is an Windows 2008R2 server
The DFS targets are Netapp Cifs servers
The Ubuntu machine is joined to an Windows 2008R2 domain (upgraded from 2003R2) using winbind with the idmap_ad backend.
We have a faily large domain containing about 60000 accounts.