Arch Linux

lesh

Member

Registered: 2009-01-29

Posts: 5

kernel 2.6.28 1 mounting segfaults

Hello, after system update I'm having some serious-looking problems,
I'm surprised I'm the only one, am I making some stupid mistake?

here is my pacman log:

[2009-01-29 18:41] upgraded fakeroot (1.11.4-1 -> 1.12.1-1)
[2009-01-29 18:41] upgraded gcc-libs (4.3.2-2 -> 4.3.3-1)
[2009-01-29 18:41] upgraded gcc (4.3.2-2 -> 4.3.3-1)
[2009-01-29 18:41] >>> Updating module dependencies. Please wait ...
[2009-01-29 18:41] >>> MKINITCPIO SETUP
[2009-01-29 18:41] >>> ----------------
[2009-01-29 18:41] >>> If you use LVM2, Encrypted root or software RAID,
[2009-01-29 18:41] >>> Ensure you enable support in /etc/mkinitcpio.conf .
[2009-01-29 18:41] >>> More information about mkinitcpio setup can be found here:
[2009-01-29 18:41] >>> http://wiki.archlinux.org/index.php/Mkinitcpio
[2009-01-29 18:41] 
[2009-01-29 18:41] >>> Generating initial ramdisk, using mkinitcpio.  Please wait...
[2009-01-29 18:41] ==> Building image "default"
[2009-01-29 18:41] ==> Running command: /sbin/mkinitcpio -k 2.6.28-ARCH -c /etc/mkinitcpio.conf -g /boot/kernel26.img
[2009-01-29 18:41] :: Begin dry run
[2009-01-29 18:41] :: Parsing hook [base]
[2009-01-29 18:41] :: Parsing hook [udev]
[2009-01-29 18:41] :: Parsing hook [autodetect]
[2009-01-29 18:41] :: Parsing hook [pata]
[2009-01-29 18:41] :: Parsing hook [scsi]
[2009-01-29 18:41] :: Parsing hook [sata]
[2009-01-29 18:41] :: Parsing hook [keymap]
[2009-01-29 18:41] :: Parsing hook [encrypt]
[2009-01-29 18:41] :: Parsing hook [lvm2]
[2009-01-29 18:41] :: Parsing hook [uresume]
[2009-01-29 18:41] :: Parsing hook [filesystems]
[2009-01-29 18:41] :: Generating module dependencies
[2009-01-29 18:41] :: Generating image '/boot/kernel26.img'...SUCCESS
[2009-01-29 18:41] ==> SUCCESS
[2009-01-29 18:41] ==> Building image "fallback"
[2009-01-29 18:41] ==> Running command: /sbin/mkinitcpio -k 2.6.28-ARCH -c /etc/mkinitcpio.conf -g /boot/kernel26-fallback.img -S autodetect
[2009-01-29 18:41] :: Begin dry run
[2009-01-29 18:41] :: Parsing hook [base]
[2009-01-29 18:41] :: Parsing hook [udev]
[2009-01-29 18:41] :: Parsing hook [pata]
[2009-01-29 18:41] :: Parsing hook [scsi]
[2009-01-29 18:41] :: Parsing hook [sata]
[2009-01-29 18:41] :: Parsing hook [keymap]
[2009-01-29 18:41] :: Parsing hook [encrypt]
[2009-01-29 18:41] :: Parsing hook [lvm2]
[2009-01-29 18:41] :: Parsing hook [uresume]
[2009-01-29 18:41] :: Parsing hook [filesystems]
[2009-01-29 18:41] :: Generating module dependencies
[2009-01-29 18:42] :: Generating image '/boot/kernel26-fallback.img'...SUCCESS
[2009-01-29 18:42] ==> SUCCESS
[2009-01-29 18:42] upgraded kernel26 (2.6.28.1-1 -> 2.6.28.2-1)
[2009-01-29 18:42] upgraded man-pages (3.16-1 -> 3.17-1)
[2009-01-29 18:42] upgraded mplayer (28347-1 -> 28347-2)
[2009-01-29 18:42] upgraded ncmpc (0.11.1-5 -> 0.13-1)
[2009-01-29 18:42] upgraded reiserfsprogs (3.6.20-3 -> 3.6.21-1)

boot log:

Jan 30 00:43:31 phobos hub 5-0:1.0: USB hub found
Jan 30 00:43:31 phobos hub 5-0:1.0: 2 ports detected
Jan 30 00:43:31 phobos iTCO_wdt: Intel TCO WatchDog Timer Driver v1.04
Jan 30 00:43:31 phobos iTCO_wdt: Found a ICH7 or ICH7R TCO device (Version=2, TCOBASE=0x0860)
Jan 30 00:43:31 phobos iTCO_wdt: initialized. heartbeat=30 sec (nowayout=0)
Jan 30 00:43:31 phobos EXT3 FS on dm-1, internal journal
Jan 30 00:43:31 phobos BUG: unable to handle kernel NULL pointer dereference at 00000004
Jan 30 00:43:31 phobos IP: [<c01b1f5c>] __find_get_block_slow+0x1c/0x140
Jan 30 00:43:31 phobos *pde = 00000000 
Jan 30 00:43:31 phobos Oops: 0000 [#1] PREEMPT SMP 
Jan 30 00:43:31 phobos last sysfs file: /sys/kernel/uevent_seqnum
Jan 30 00:43:31 phobos Modules linked in: ext2 iTCO_wdt uhci_hcd i2c_i801 iTCO_vendor_support 8139cp 8139too ehci_hcd i2c_core intel_agp agpgart ppdev usbcore sg lp pcspkr parport_pc parport ppp_generic thermal evdev processor fan button battery ac snd_ens1371 gameport snd_ac97_codec snd_rawmidi snd_hda_intel snd_hwdep snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_pcm snd_timer snd_page_alloc snd_mixer_oss snd soundcore ac97_bus slhc pcnet32 mii rtc_cmos rtc_core rtc_lib ext3 jbd mbcache xts gf128mul sd_mod aes_i586 aes_generic dm_crypt dm_mod ata_piix mptspi mptscsih mptbase scsi_transport_spi ata_generic pata_acpi libata scsi_mod
Jan 30 00:43:31 phobos 
Jan 30 00:43:31 phobos Pid: 1525, comm: mount Not tainted (2.6.28-ARCH #1) System Product Name
Jan 30 00:43:31 phobos EIP: 0060:[<c01b1f5c>] EFLAGS: 00010286 CPU: 0
Jan 30 00:43:31 phobos EIP is at __find_get_block_slow+0x1c/0x140
Jan 30 00:43:31 phobos EAX: 00000000 EBX: 00000000 ECX: 0000000c EDX: 00000001
Jan 30 00:43:31 phobos ESI: 00000001 EDI: 00000000 EBP: 00000000 ESP: f5c59d50
Jan 30 00:43:31 phobos DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
Jan 30 00:43:31 phobos Process mount (pid: 1525, ti=f5c58000 task=f6afe400 task.ti=f5c58000)
Jan 30 00:43:31 phobos Stack:
Jan 30 00:43:31 phobos f5c59ec7 c020f3f0 c01246bf c032bc7e 00000004 c16d5280 f6a98000 c16d5300
Jan 30 00:43:31 phobos 00000000 c200db00 c0482b00 00000000 c01b24b8 00000000 00000001 00000000
Jan 30 00:43:31 phobos 0002c0d0 00000000 00000286 00000004 c0407a00 00000000 00000000 c040958c
Jan 30 00:43:31 phobos Call Trace:
Jan 30 00:43:31 phobos [<c020f3f0>] vsnprintf+0x3c0/0x790
Jan 30 00:43:31 phobos [<c01246bf>] kunmap_atomic+0x3f/0xe0
Jan 30 00:43:31 phobos [<c032bc7e>] _spin_lock_irqsave+0x3e/0x60
Jan 30 00:43:31 phobos [<c01b24b8>] __find_get_block+0xc8/0x1a0
Jan 30 00:43:31 phobos [<c01b25b3>] __getblk+0x23/0x330
Jan 30 00:43:31 phobos [<c016e01d>] __alloc_pages_internal+0xbd/0x480
Jan 30 00:43:31 phobos [<c032a833>] __mutex_lock_slowpath+0x1d3/0x250
Jan 30 00:43:31 phobos [<c01b5880>] __bread+0x10/0xa0
Jan 30 00:43:31 phobos [<f8c9b951>] ext2_fill_super+0xb1/0xd10 [ext2]
Jan 30 00:43:31 phobos [<c01b823f>] __blkdev_get+0x19f/0x2c0
Jan 30 00:43:31 phobos [<c020f84b>] snprintf+0x1b/0x20
Jan 30 00:43:31 phobos [<c01d8395>] disk_name+0x55/0xc0
Jan 30 00:43:31 phobos [<c019526e>] get_sb_bdev+0x12e/0x160
Jan 30 00:43:31 phobos [<c01a9576>] alloc_vfsmnt+0x76/0xf0
Jan 30 00:43:31 phobos [<f8c9a550>] ext2_get_sb+0x20/0x30 [ext2]
Jan 30 00:43:31 phobos [<f8c9b8a0>] ext2_fill_super+0x0/0xd10 [ext2]
Jan 30 00:43:31 phobos [<c0194dd2>] vfs_kern_mount+0x72/0x150
Jan 30 00:43:31 phobos [<c0194f0d>] do_kern_mount+0x3d/0xe0
Jan 30 00:43:31 phobos [<c01aa082>] do_mount+0x442/0x7b0
Jan 30 00:43:31 phobos [<c01a83b4>] copy_mount_options+0x44/0x130
Jan 30 00:43:31 phobos [<c01aa489>] sys_mount+0x99/0xd0
Jan 30 00:43:31 phobos [<c0103f13>] sysenter_do_call+0x12/0x33
Jan 30 00:43:31 phobos Code: eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 90 83 ec 30 89 5c 24 20 89 74 24 24 89 d6 89 7c 24 28 89 cf b9 0c 00 00 00 89 6c 24 2c <8b> 40 04 89 44 24 18 8b a8 b4 00 00 00 2b 48 64 89 d0 89 fa d3 
Jan 30 00:43:31 phobos EIP: [<c01b1f5c>] __find_get_block_slow+0x1c/0x140 SS:ESP 0068:f5c59d50
Jan 30 00:43:31 phobos ---[ end trace 83104361edc64c3b ]---

on bootscreen I see "/bin/mount -a -t $NETFS" has failed..

I checked what didn't mount, and it was:

UUID=45bc58dc-01bf-47c5-bd16-db271e000049 /boot ext2 defaults 0 1

after I comment it in fstab, the boot procedure continues without error.. two encrypted lvm ext3 drives are mounted normally..

the next problem is with usb disk:

Jan 30 00:44:44 phobos usb 1-1: new high speed USB device using ehci_hcd and address 2
Jan 30 00:44:44 phobos usb 1-1: configuration #1 chosen from 1 choice
Jan 30 00:44:44 phobos usbcore: registered new interface driver hiddev
Jan 30 00:44:44 phobos Initializing USB Mass Storage driver...
Jan 30 00:44:44 phobos input: Western Digital My Book as /class/input/input5
Jan 30 00:44:44 phobos generic-usb 0003:1058:1102.0001: input,hidraw0: USB HID v1.11 Device [Western Digital My Book] on usb-0000:00:1d.7-1/input1
Jan 30 00:44:44 phobos usbcore: registered new interface driver usbhid
Jan 30 00:44:44 phobos usbhid: v2.6:USB HID core driver
Jan 30 00:44:44 phobos scsi4 : SCSI emulation for USB Mass Storage devices
Jan 30 00:44:44 phobos usbcore: registered new interface driver usb-storage
Jan 30 00:44:44 phobos USB Mass Storage support registered.
Jan 30 00:44:44 phobos usb-storage: device found at 2
Jan 30 00:44:44 phobos usb-storage: waiting for device to settle before scanning
Jan 30 00:44:49 phobos scsi 4:0:0:0: Direct-Access     WD       My Book          1025 PQ: 0 ANSI: 4
Jan 30 00:44:49 phobos sd 4:0:0:0: [sdc] 976773168 512-byte hardware sectors: (500 GB/465 GiB)
Jan 30 00:44:49 phobos sd 4:0:0:0: [sdc] Write Protect is off
Jan 30 00:44:49 phobos sd 4:0:0:0: [sdc] Mode Sense: 10 00 00 00
Jan 30 00:44:49 phobos sd 4:0:0:0: [sdc] Assuming drive cache: write through
Jan 30 00:44:49 phobos sd 4:0:0:0: [sdc] 976773168 512-byte hardware sectors: (500 GB/465 GiB)
Jan 30 00:44:49 phobos sd 4:0:0:0: [sdc] Write Protect is off
Jan 30 00:44:49 phobos sd 4:0:0:0: [sdc] Mode Sense: 10 00 00 00
Jan 30 00:44:49 phobos sd 4:0:0:0: [sdc] Assuming drive cache: write through
Jan 30 00:44:49 phobos sdc: sdc1
Jan 30 00:44:49 phobos sd 4:0:0:0: [sdc] Attached SCSI disk
Jan 30 00:44:49 phobos sd 4:0:0:0: Attached scsi generic sg2 type 0
Jan 30 00:44:49 phobos usb-storage: device scan complete

mount attempt... 

Jan 30 00:45:01 phobos BUG: unable to handle kernel NULL pointer dereference at 00000004
Jan 30 00:45:01 phobos IP: [<c01b1f5c>] __find_get_block_slow+0x1c/0x140
Jan 30 00:45:01 phobos *pde = 00000000
Jan 30 00:45:01 phobos Oops: 0000 [#2] PREEMPT SMP
Jan 30 00:45:01 phobos last sysfs file: /sys/devices/pci0000:00/0000:00:1d.7/usb1/idVendor
Jan 30 00:45:01 phobos Modules linked in: vfat fat usb_storage usbhid hid ipv6 ext2 iTCO_wdt uhci_hcd i2c_i801 iTCO_vendor_support 8139cp 8139too ehci_hcd i2c_core intel_agp agpgart ppdev usbcore sg lp pcspkr parport_pc parport ppp_generic thermal evdev processor fan button ba$
Jan 30 00:45:01 phobos
Jan 30 00:45:01 phobos Pid: 2574, comm: mount Tainted: G      D    (2.6.28-ARCH #1) System Product Name
Jan 30 00:45:01 phobos EIP: 0060:[<c01b1f5c>] EFLAGS: 00010282 CPU: 1
Jan 30 00:45:01 phobos EIP is at __find_get_block_slow+0x1c/0x140
Jan 30 00:45:01 phobos EAX: 00000000 EBX: 00000000 ECX: 0000000c EDX: 00000000
Jan 30 00:45:01 phobos ESI: 00000000 EDI: 00000000 EBP: 00000000 ESP: f5445d38
Jan 30 00:45:01 phobos DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
Jan 30 00:45:01 phobos Process mount (pid: 2574, ti=f5444000 task=f6afd000 task.ti=f5444000)
Jan 30 00:45:01 phobos Stack:
Jan 30 00:45:01 phobos c032c095 c020ef87 f5445ec7 c03ac859 ffffffff 00000002 f5445ec7 c020f3f0
Jan 30 00:45:01 phobos 00000000 c2016b00 c0482b00 00000000 c01b24b8 00000000 00000000 00000020
Jan 30 00:45:01 phobos f5445ec4 f684f080 0000000a f5445ee4 ffffffff f5445dd0 f5445ea0 f59bb140
Jan 30 00:45:01 phobos Call Trace:
Jan 30 00:45:01 phobos [<c032c095>] _spin_unlock+0x5/0x20
Jan 30 00:45:01 phobos [<c020ef87>] string+0x27/0xd0
Jan 30 00:45:01 phobos [<c020f3f0>] vsnprintf+0x3c0/0x790
Jan 30 00:45:01 phobos [<c01b24b8>] __find_get_block+0xc8/0x1a0
Jan 30 00:45:01 phobos [<c01b25b3>] __getblk+0x23/0x330
Jan 30 00:45:01 phobos [<c01b5880>] __bread+0x10/0xa0
Jan 30 00:45:01 phobos [<f8c5a71f>] fat_fill_super+0x21f/0xd10 [fat]
Jan 30 00:45:01 phobos [<c020a64f>] kobject_get+0xf/0x20
Jan 30 00:45:01 phobos [<c01b823f>] __blkdev_get+0x19f/0x2c0
Jan 30 00:45:01 phobos [<c020f84b>] snprintf+0x1b/0x20
Jan 30 00:45:01 phobos [<f8b4624a>] vfat_fill_super+0x1a/0x60 [vfat]
Jan 30 00:45:01 phobos [<c019526e>] get_sb_bdev+0x12e/0x160
Jan 30 00:45:01 phobos [<f8b46220>] vfat_get_sb+0x20/0x30 [vfat]
Jan 30 00:45:01 phobos [<f8b46230>] vfat_fill_super+0x0/0x60 [vfat]
Jan 30 00:45:01 phobos [<c0194dd2>] vfs_kern_mount+0x72/0x150
Jan 30 00:45:01 phobos [<c0194f0d>] do_kern_mount+0x3d/0xe0
Jan 30 00:45:01 phobos [<c01aa082>] do_mount+0x442/0x7b0
Jan 30 00:45:01 phobos [<c01a83b4>] copy_mount_options+0x44/0x130
Jan 30 00:45:01 phobos [<c01aa489>] sys_mount+0x99/0xd0
Jan 30 00:45:01 phobos [<c0103f13>] sysenter_do_call+0x12/0x33
Jan 30 00:45:01 phobos Code: eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 90 83 ec 30 89 5c 24 20 89 74 24 24 89 d6 89 7c 24 28 89 cf b9 0c 00 00 00 89 6c 24 2c <8b> 40 04 89 44 24 18 8b a8 b4 00 00 00 2b 48 64 89 d0 89 fa d3
Jan 30 00:45:01 phobos EIP: [<c01b1f5c>] __find_get_block_slow+0x1c/0x140 SS:ESP 0068:f5445d38
Jan 30 00:45:01 phobos ---[ end trace 83104361edc64c3b ]---
Jan 30 00:45:09 phobos usb 1-1: USB disconnect, address 2

the mount attempt ends with segfault, if I try it again, mount freezes, the filesystem on the disk is fat.
after this the system detects only this usb disconnect, and it is unable to detect plugging in of any new usb device.. mouse is working if its plugged in before trying to mount.
also, shutdown or reboot doesn't work..

thank you for your time.

Last edited by lesh (2009-01-30 00:24:28)

archeee

Member

Registered: 2008-12-27

Posts: 2

Re: kernel 2.6.28 1 mounting segfaults

I did the same upgrade and I have the same Problem, if I try to mount a vfat volume.

/etc/fstab:

/dev/sdb1      /media/sdb1 vfat   users,gid=100,rw,umask=002   0 0

dmesg:

BUG: unable to handle kernel NULL pointer dereference at 00000004
IP: [<c01b1f5c>] __find_get_block_slow+0x1c/0x140
*pde = 00000000 
Oops: 0000 [#1] PREEMPT SMP 
last sysfs file: /sys/devices/system/cpu/sched_mc_power_savings
Modules linked in: nfsd lockd nfs_acl auth_rpcgss sunrpc exportfs ipv6 ohci1394 ieee1394 ppdev lp snd_hda_intel ppp_generic slhc snd_pcsp emu10k1_gp gameport sg parport_pc parport sis_agp button battery ac fan thermal processor vfat fat nvidia(P) agpgart i2c_core snd_seq_oss snd_seq_midi_event snd_seq snd_emu10k1 snd_pcm_oss snd_mixer_oss snd_rawmidi snd_ac97_codec ac97_bus snd_pcm snd_seq_device snd_timer snd_page_alloc snd_util_mem snd_hwdep snd soundcore evdev sis190 mii rtc_cmos rtc_core rtc_lib ext3 jbd mbcache usbhid hid sd_mod sr_mod ehci_hcd ohci_hcd cdrom usbcore sata_sis ata_generic pata_sis pata_acpi libata scsi_mod

Pid: 2888, comm: mount Tainted: P           (2.6.28-ARCH #1) 662M03
EIP: 0060:[<c01b1f5c>] EFLAGS: 00210282 CPU: 0
EIP is at __find_get_block_slow+0x1c/0x140
EAX: 00000000 EBX: 00000000 ECX: 0000000c EDX: 00000000
ESI: 00000000 EDI: 00000000 EBP: 00000000 ESP: f0fbfd38
 DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
Process mount (pid: 2888, ti=f0fbe000 task=f0cf7400 task.ti=f0fbe000)
Stack:
 c032c095 c020ef87 f0fbfec7 c03ac859 ffffffff 00000002 f0fbfec7 c020f3f0
 00000000 c1808b00 c0482b00 00000000 c01b24b8 00000000 00000000 00000020
 f0fbfec4 f6960000 0000000a f0fbfee4 ffffffff f0fbfdd0 f0fbfea0 f6c53b50
Call Trace:
 [<c032c095>] _spin_unlock+0x5/0x20
 [<c020ef87>] string+0x27/0xd0
 [<c020f3f0>] vsnprintf+0x3c0/0x790
 [<c01b24b8>] __find_get_block+0xc8/0x1a0
 [<c01b25b3>] __getblk+0x23/0x330
 [<c01a86b8>] mntput_no_expire+0x18/0x110
 [<c01515ac>] debug_mutex_add_waiter+0x1c/0x60
 [<c01b5880>] __bread+0x10/0xa0
 [<f8b7d71f>] fat_fill_super+0x21f/0xd10 [fat]
 [<c020a64f>] kobject_get+0xf/0x20
 [<c01b823f>] __blkdev_get+0x19f/0x2c0
 [<c020f84b>] snprintf+0x1b/0x20
 [<f8a9624a>] vfat_fill_super+0x1a/0x60 [vfat]
 [<c019526e>] get_sb_bdev+0x12e/0x160
 [<c01a9576>] alloc_vfsmnt+0x76/0xf0
 [<f8a96220>] vfat_get_sb+0x20/0x30 [vfat]
 [<f8a96230>] vfat_fill_super+0x0/0x60 [vfat]
 [<c0194dd2>] vfs_kern_mount+0x72/0x150
 [<c0194f0d>] do_kern_mount+0x3d/0xe0
 [<c01aa082>] do_mount+0x442/0x7b0
 [<c01a83b4>] copy_mount_options+0x44/0x130
 [<c01aa489>] sys_mount+0x99/0xd0
 [<c0103f13>] sysenter_do_call+0x12/0x33
Code: eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 90 83 ec 30 89 5c 24 20 89 74 24 24 89 d6 89 7c 24 28 89 cf b9 0c 00 00 00 89 6c 24 2c <8b> 40 04 89 44 24 18 8b a8 b4 00 00 00 2b 48 64 89 d0 89 fa d3 
EIP: [<c01b1f5c>] __find_get_block_slow+0x1c/0x140 SS:ESP 0068:f0fbfd38
---[ end trace 4c5d9f59f5cb7c26 ]---

lesh

Member

Registered: 2009-01-29

Posts: 5

Re: kernel 2.6.28 1 mounting segfaults

I've delt with this by reverting to older .27 kernel by using a package from http://schlunix.org/archlinux/
and I've added kernel26 to ignorepkg line in pacman.conf..

not a good solution for everyone, but its fine for me.
you could probbably get it working by building your own kernel..

I'll get around to debugging this if it keeps persisting in new packages.

this seems to be rare, possibly its hardware related.
I have asus P5PL2 mainboard.

archeee

Member

Registered: 2008-12-27

Posts: 2

Re: kernel 2.6.28 1 mounting segfaults

Here this problem occurs with the packages kernel26 2.6.28.2-1 and 2.6.28.3-1.
2.6.28.1-1 works fine.

skraburski

Member

Registered: 2007-10-23

Posts: 9

Re: kernel 2.6.28 1 mounting segfaults

hi, I have simmilar problem, after kernel update arch is not mounting my pendrives,
I've also lost access to my windows partition

I believe this must be something with configs or authorization as I'm able to mount pendrive
and windows partition from root account

any ideas?

Regards,
Lukasz

skottish

Forum Fellow

From: Here

Registered: 2006-06-16

Posts: 7,942

Re: kernel 2.6.28 1 mounting segfaults

hi, I have simmilar problem, after kernel update arch is not mounting my pendrives,
I've also lost access to my windows partition

I believe this must be something with configs or authorization as I'm able to mount pendrive
and windows partition from root account

any ideas?

Regards,
Lukasz

Check out the wiki on PolicyKit. I'll be you'll find your solution there.