preempt with selinux NULL pointer dereference

preempt with selinux NULL pointer dereference

[antoine]

After using it for a good few hours, I launched a shell script in a terminal and got the traces below.
I hope this helps (if not, please let me know how to make it helpful or I'll just stop testing -rc kernels and save myself some time)


[ 4788.218951] Unable to handle kernel NULL pointer dereference at 0000000000000028 RIP:
[ 4788.218959] <ffffffff80247381>{inode_has_perm+81}
[ 4788.218971] PGD 2485f067 PUD 0
[ 4788.218975] Oops: 0000 [1] PREEMPT
[ 4788.218977] CPU 0
[ 4788.218979] Modules linked in: parport_pc lp parport eeprom i2c_sensor i2c_viapro i2c_dev i2c_core rfcomm l2cap bluetooth sunrpc ipt_REJECT ipt_state ip_conntrack iptable_filter ip_tables dm_mod hotkey container tsdev usbhid yenta_socket rsrc_nonstatic uhci_hcd ehci_hcd shpchp via_ircc irda crc_ccitt
[ 4788.218995] Pid: 19002, comm: ssh Tainted: G   M  2.6.13-rc5
[ 4788.218998] RIP: 0010:[<ffffffff80247381>] <ffffffff80247381>{inode_has_perm+81}
[ 4788.219005] RSP: 0018:ffff81004f987df8  EFLAGS: 00010286
[ 4788.219009] RAX: ffff81004f987e88 RBX: ffff810041e915a0 RCX: ffff81004f987e88
[ 4788.219013] RDX: 0000000000000002 RSI: ffff81004d0e1520 RDI: ffff8100329b0330
[ 4788.219017] RBP: 0000000000000000 R08: 0000000000000000 R09: ffff81004f987e88
[ 4788.219020] R10: 0000000000000000 R11: 0000000000000246 R12: ffff81004d0e1520
[ 4788.219024] R13: ffff810032cec600 R14: 0000000000000002 R15: ffff81004f987e88
[ 4788.219029] FS:  00002aaaabb67f60(0000) GS:ffffffff80625800(0000) knlGS:00000000afb6abb0
[ 4788.219032] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 4788.219035] CR2: 0000000000000028 CR3: 0000000026b34000 CR4: 00000000000006e0
[ 4788.219039] Process ssh (pid: 19002, threadinfo ffff81004f986000, task ffff8100329b0330)
[ 4788.219042] Stack: ffff81004f987f08 0000000000000000 7fffffffffffffff ffff810039af4620
[ 4788.219048]        ffff810039af4628 ffff810039af4630 ffff810039af4608 ffff810039af4610
[ 4788.219054]        ffff810039af4618 0000000000000018
[ 4788.219058] Call Trace:<ffffffff8024ca78>{selinux_file_permission+344} <ffffffff8015f062>{audit_syscall_entry+338}
[ 4788.219076]        <ffffffff80185155>{vfs_read+181} <ffffffff80185943>{sys_read+83}
[ 4788.219088]        <ffffffff8010ed52>{tracesys+209}
[ 4788.219098]
[ 4788.219099] Code: 0f b7 55 28 8b 75 24 49 89 c8 41 8b 7d 14 44 89 f1 e8 29 fd
[ 4788.219108] RIP <ffffffff80247381>{inode_has_perm+81} RSP <ffff81004f987df8>
[ 4788.219114] CR2: 0000000000000028
[ 4788.219116]  <1>Unable to handle kernel NULL pointer dereference at 0000000000000028 RIP:
[ 4788.220081] <ffffffff80247381>{inode_has_perm+81}
[ 4788.220087] PGD 72aa067 PUD 3695b067 PMD 0
[ 4788.220090] Oops: 0000 [2] PREEMPT
[ 4788.220093] CPU 0
[ 4788.220094] Modules linked in: parport_pc lp parport eeprom i2c_sensor i2c_viapro i2c_dev i2c_core rfcomm l2cap bluetooth sunrpc ipt_REJECT ipt_state ip_conntrack iptable_filter ip_tables dm_mod hotkey container tsdev usbhid yenta_socket rsrc_nonstatic uhci_hcd ehci_hcd shpchp via_ircc irda crc_ccitt
[ 4788.220109] Pid: 18983, comm: bash Tainted: G   M  2.6.13-rc5
[ 4788.220112] RIP: 0010:[<ffffffff80247381>] <ffffffff80247381>{inode_has_perm+81}
[ 4788.220118] RSP: 0018:ffff81001af21e18  EFLAGS: 00010286
[ 4788.220123] RAX: ffff81001af21eb8 RBX: ffff810041e915a0 RCX: ffff81001af21eb8
[ 4788.220127] RDX: 0000000000000001 RSI: ffff81004d0e1520 RDI: ffff8100329b10d0
[ 4788.220130] RBP: 0000000000000000 R08: 0000000000000000 R09: ffff81001af21eb8
[ 4788.220133] R10: 0000000000000008 R11: 0000000000000246 R12: ffff81004d0e1520
[ 4788.220137] R13: ffff81002f8ac180 R14: 0000000000000001 R15: ffff8100329b10d0
[ 4788.220142] FS:  00002aaaaaad2ee0(0000) GS:ffffffff80625800(0000) knlGS:00000000afb6abb0
[ 4788.220145] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 4788.220148] CR2: 0000000000000028 CR3: 0000000035847000 CR4: 00000000000006e0
[ 4788.220152] Process bash (pid: 18983, threadinfo ffff81001af20000, task ffff8100329b10d0)
[ 4788.220155] Stack: 0000000000000004 ffff8100329b0330 ffff81004feede40 ffffffffffffffef
[ 4788.220160]        ffffffff8016a483 0000000000000010 0000000000000292 ffff81001af21e68
[ 4788.220166]        0000000000000018 0000000000000292
[ 4788.220168] Call Trace:<ffffffff8016a483>{kmem_cache_free+99} <ffffffff8024cdc2>{selinux_file_ioctl+770}
[ 4788.220180]        <ffffffff80199ca5>{sys_ioctl+85} <ffffffff8010ed52>{tracesys+209}
[ 4788.220192]
[ 4788.220197]
[ 4788.220198] Code: 0f b7 55 28 8b 75 24 49 89 c8 41 8b 7d 14 44 89 f1 e8 29 fd
[ 4788.220207] RIP <ffffffff80247381>{inode_has_perm+81} RSP <ffff81001af21e18>
[ 4788.220213] CR2: 0000000000000028
[ 4788.220215]  <1>Unable to handle kernel NULL pointer dereference at 00000000000001f0 RIP:
[ 4788.220489] <ffffffff801b04c1>{inotify_dentry_parent_queue_event+65}
[ 4788.220495] PGD 0
[ 4788.220497] Oops: 0000 [3] PREEMPT
[ 4788.220499] CPU 0
[ 4788.220501] Modules linked in: parport_pc lp parport eeprom i2c_sensor i2c_viapro i2c_dev i2c_core rfcomm l2cap bluetooth sunrpc ipt_REJECT ipt_state ip_conntrack iptable_filter ip_tables dm_mod hotkey container tsdev usbhid yenta_socket rsrc_nonstatic uhci_hcd ehci_hcd shpchp via_ircc irda crc_ccitt
[ 4788.220515] Pid: 18983, comm: bash Tainted: G   M  2.6.13-rc5
[ 4788.220518] RIP: 0010:[<ffffffff801b04c1>] <ffffffff801b04c1>{inotify_dentry_parent_queue_event+65}
[ 4788.220524] RSP: 0018:ffff81001af21b48  EFLAGS: 00010213
[ 4788.220528] RAX: 00000000000001f0 RBX: ffff81004f8f0000 RCX: ffff810041e91654
[ 4788.220531] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[ 4788.220535] RBP: 0000000000000000 R08: ffff81004f474d60 R09: ffff81001af21ba8
[ 4788.220538] R10: 0000000000000006 R11: 000000000000000a R12: ffff810041e91654
[ 4788.220541] R13: 0000000000000000 R14: 0000000000000008 R15: ffff810000ea8a40
[ 4788.220546] FS:  00002aaaaaad2ee0(0000) GS:ffffffff80625800(0000) knlGS:00000000afb6abb0
[ 4788.220549] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 4788.220552] CR2: 00000000000001f0 CR3: 0000000035847000 CR4: 00000000000006e0
[ 4788.220556] Process bash (pid: 18983, threadinfo ffff81001af20000, task ffff8100329b10d0)
[ 4788.220559] Stack: 0000000000000008 ffff810018ad7880 ffff81004f881d80 ffff81004d0e1520
[ 4788.220564]        ffff810041e915a0 ffffffff80186036 ffff810018ad7880 0000000000000000
[ 4788.220570]        ffff81003dfcf880 0000000000000000
[ 4788.220573] Call Trace:<ffffffff80186036>{__fput+102} <ffffffff80183028>{filp_close+104}
[ 4788.220583]        <ffffffff80138644>{put_files_struct+116} <ffffffff8013985a>{do_exit+554}
[ 4788.220593]        <ffffffff802b2a3e>{do_unblank_screen+110} <ffffffff801239ef>{do_page_fault+1823}
[ 4788.220604]        <ffffffff80167292>{__alloc_pages+242} <ffffffff8010f4e1>{error_exit+0}
[ 4788.220619]        <ffffffff80247381>{inode_has_perm+81} <ffffffff8016a483>{kmem_cache_free+99}
[ 4788.220632]        <ffffffff8024cdc2>{selinux_file_ioctl+770} <ffffffff80199ca5>{sys_ioctl+85}
[ 4788.220645]        <ffffffff8010ed52>{tracesys+209}
[ 4788.220654]
[ 4788.220654] Code: 48 3b 85 f0 01 00 00 74 76 8b 03 85 c0 75 10 0f 0b a3 93 48
[ 4788.220663] RIP <ffffffff801b04c1>{inotify_dentry_parent_queue_event+65} RSP <ffff81001af21b48>
[ 4788.220669] CR2: 00000000000001f0
[ 4788.220671]  <1>Fixing recursive fault but reboot is needed!
[ 4788.220674] scheduling while atomic: bash/0x00000001/18983
[ 4788.220676]
[ 4788.220677] Call Trace:<ffffffff803e438a>{schedule+122} <ffffffff803e5953>{__down_read+51}
[ 4788.220686]        <ffffffff80139746>{do_exit+278} <ffffffff802b2a3e>{do_unblank_screen+110}
[ 4788.220696]        <ffffffff801239ef>{do_page_fault+1823} <ffffffff80260b51>{sprintf+81}
[ 4788.220707]        <ffffffff80260b51>{sprintf+81} <ffffffff801669bc>{free_pages_bulk+748}
[ 4788.220714]        <ffffffff801669bc>{free_pages_bulk+748} <ffffffff8010f4e1>{error_exit+0}
[ 4788.220724]        <ffffffff801b04c1>{inotify_dentry_parent_queue_event+65}
[ 4788.220732]        <ffffffff801b04b2>{inotify_dentry_parent_queue_event+50}
[ 4788.220737]        <ffffffff80186036>{__fput+102} <ffffffff80183028>{filp_close+104}
[ 4788.220746]        <ffffffff80138644>{put_files_struct+116} <ffffffff8013985a>{do_exit+554}
[ 4788.220755]        <ffffffff802b2a3e>{do_unblank_screen+110} <ffffffff801239ef>{do_page_fault+1823}
[ 4788.220764]        <ffffffff80167292>{__alloc_pages+242} <ffffffff8010f4e1>{error_exit+0}
[ 4788.220778]        <ffffffff80247381>{inode_has_perm+81} <ffffffff8016a483>{kmem_cache_free+99}
[ 4788.220791]        <ffffffff8024cdc2>{selinux_file_ioctl+770} <ffffffff80199ca5>{sys_ioctl+85}
[ 4788.220804]        <ffffffff8010ed52>{tracesys+209}
[ 5241.139821] VM: killing process knotify
[ 5241.140773] swap_free: Unused swap offset entry 0000ca00
[ 5241.140776] swap_free: Unused swap offset entry 00007f00
[ 5657.448114] swap_free: Unused swap offset entry 00000500
[ 7515.852463] swap_free: Unused swap offset entry 00000500
[ 7529.259013] swap_free: Unused swap offset entry 00000500
[ 7548.939960] swap_free: Unused swap offset entry 00000500
[ 7566.221556] swap_free: Unused swap offset entry 00000500
[ 7581.346474] swap_free: Unused swap offset entry 00000500
[ 7795.683011] swap_free: Unused swap offset entry 00000500
[ 7966.361957] swap_free: Unused swap offset entry 00000500
[ 7998.327198] swap_free: Unused swap offset entry 00000500
[ 8024.551757] swap_free: Unused swap offset entry 00000500
[ 8056.434943] swap_free: Unused swap offset entry 00000500
[ 8198.760027] swap_free: Unused swap offset entry 00000500
[16512.532399] warning: many lost ticks.
[16512.532402] Your time source seems to be instable or some driver is hogging interupts
[16512.532412] rip handle_IRQ_event+0x1a/0x60
[58514.912605] swap_free: Unused swap offset entry 00000500
[58524.926814] device lo left promiscuous mode

Re: preempt with selinux NULL pointer dereference

[James Morris]

On Fri, 5 Aug 2005, antoine wrote:

> After using it for a good few hours, I launched a shell script in a terminal and got the traces below.
> I hope this helps (if not, please let me know how to make it helpful or I'll just stop testing -rc kernels and save myself some time)
>
>
> [ 4788.218951] Unable to handle kernel NULL pointer dereference at 0000000000000028 RIP:
> [ 4788.218959] <ffffffff80247381>{inode_has_perm+81}
> [ 4788.218971] PGD 2485f067 PUD 0
> [ 4788.218975] Oops: 0000 [1] PREEMPT
> [ 4788.218977] CPU 0
> [ 4788.218979] Modules linked in: parport_pc lp parport eeprom i2c_sensor i2c_viapro i2c_dev i2c_core rfcomm l2cap bluetooth sunrpc ipt_REJECT ipt_state ip_conntrack iptable_filter ip_tables dm_mod hotkey container tsdev usbhid yenta_socket rsrc_nonstatic uhci_hcd ehci_hcd shpchp via_ircc irda crc_ccitt
> [ 4788.218995] Pid: 19002, comm: ssh Tainted: G   M  2.6.13-rc5

Which of your modules is non-GPL and can you please remove them and see if 
there's still a problem?



- James
-- 
James Morris
<jmorris@namei.org>

Re: preempt with selinux NULL pointer dereference

[Antoine Martin]

> > [ 4788.218951] Unable to handle kernel NULL pointer dereference at 0000000000000028 RIP:
> > [ 4788.218959] <ffffffff80247381>{inode_has_perm+81}
> > [ 4788.218971] PGD 2485f067 PUD 0
> > [ 4788.218975] Oops: 0000 [1] PREEMPT
> > [ 4788.218977] CPU 0
> > [ 4788.218979] Modules linked in: parport_pc lp parport eeprom i2c_sensor i2c_viapro i2c_dev i2c_core rfcomm l2cap bluetooth sunrpc ipt_REJECT ipt_state ip_conntrack iptable_filter ip_tables dm_mod hotkey container tsdev usbhid yenta_socket rsrc_nonstatic uhci_hcd ehci_hcd shpchp via_ircc irda crc_ccitt
> > [ 4788.218995] Pid: 19002, comm: ssh Tainted: G   M  2.6.13-rc5
> 
> Which of your modules is non-GPL and can you please remove them and see if 
> there's still a problem?
Hmm. I occasionally use out-of-tree drivers (wlan cards mainly) so I
thought these could be the culprit, but all the above are in the source
tree (I keep the others out):
lsmod | awk '{print $1".ko"}' | sed 's+_+-+g' | xargs -n 1
find /lib/modules/2.6.13-rc5 -type f -name
/lib/modules/2.6.13-rc5/kernel/drivers/char/lp.ko
/lib/modules/2.6.13-rc5/kernel/drivers/parport/parport.ko
/lib/modules/2.6.13-rc5/kernel/drivers/i2c/chips/eeprom.ko
/lib/modules/2.6.13-rc5/kernel/drivers/i2c/i2c-sensor.ko
/lib/modules/2.6.13-rc5/kernel/drivers/i2c/busses/i2c-viapro.ko
/lib/modules/2.6.13-rc5/kernel/drivers/i2c/i2c-dev.ko
/lib/modules/2.6.13-rc5/kernel/drivers/i2c/i2c-core.ko
/lib/modules/2.6.13-rc5/kernel/net/bluetooth/rfcomm/rfcomm.ko
/lib/modules/2.6.13-rc5/kernel/net/bluetooth/l2cap.ko
/lib/modules/2.6.13-rc5/kernel/net/bluetooth/bluetooth.ko
/lib/modules/2.6.13-rc5/kernel/net/sunrpc/sunrpc.ko
/lib/modules/2.6.13-rc5/kernel/drivers/md/dm-mod.ko
/lib/modules/2.6.13-rc5/kernel/drivers/acpi/hotkey.ko
/lib/modules/2.6.13-rc5/kernel/drivers/acpi/container.ko
/lib/modules/2.6.13-rc5/kernel/drivers/input/tsdev.ko
/lib/modules/2.6.13-rc5/kernel/drivers/usb/input/usbhid.ko
/lib/modules/2.6.13-rc5/kernel/drivers/usb/host/uhci-hcd.ko
/lib/modules/2.6.13-rc5/kernel/drivers/usb/host/ehci-hcd.ko
/lib/modules/2.6.13-rc5/kernel/drivers/pci/hotplug/shpchp.ko
/lib/modules/2.6.13-rc5/kernel/drivers/net/irda/via-ircc.ko
/lib/modules/2.6.13-rc5/kernel/net/irda/irda.ko
/lib/modules/2.6.13-rc5/kernel/lib/crc-ccitt.ko
(iptables ones omitted)

Is there an *easy* way to figure out what is tainting my kernel?
I removed all I could (whilst leaving the machine usable):
# lsmod
Module                  Size  Used by
tsdev                   8832  0
usbhid                 48992  0
uhci_hcd               36000  0
parport_pc             44080  0
parport                42444  1 parport_pc
i2c_sensor              3840  0
i2c_core               25048  1 i2c_sensor
l2cap                  29704  2
bluetooth              56516  3 l2cap
sunrpc                163688  1
ipt_REJECT              6464  1
ipt_state               2368  3
ip_conntrack           49812  1 ipt_state
iptable_filter          3584  1
ip_tables              24000  3 ipt_REJECT,ipt_state,iptable_filter
yenta_socket           25804  4
rsrc_nonstatic         13376  1 yenta_socket
irda                  210924  0
crc_ccitt               2560  1 irda

# cat /proc/sys/kernel/tainted
16
Even figuring out the definition of the 'tainted' masks took a bit of
googling.

Thanks
Antoine

Re: preempt with selinux NULL pointer dereference

[James Morris]

On Fri, 5 Aug 2005, Antoine Martin wrote:

> # cat /proc/sys/kernel/tainted
> 16
> Even figuring out the definition of the 'tainted' masks took a bit of
> googling.

Try something like:

   cat /proc/modules | cut -f1 -d ' '| xargs modinfo


-- 
James Morris
<jmorris@namei.org>

Re: preempt with selinux NULL pointer dereference

[linux-os (Dick Johnson)]

On Fri, 5 Aug 2005, Antoine Martin wrote:

>>> [ 4788.218951] Unable to handle kernel NULL pointer dereference at 0000000000000028 RIP:
>>> [ 4788.218959] <ffffffff80247381>{inode_has_perm+81}
>>> [ 4788.218971] PGD 2485f067 PUD 0
>>> [ 4788.218975] Oops: 0000 [1] PREEMPT
>>> [ 4788.218977] CPU 0
>>> [ 4788.218979] Modules linked in: parport_pc lp parport eeprom i2c_sensor i2c_viapro i2c_dev i2c_core rfcomm l2cap bluetooth sunrpc ipt_REJECT ipt_state ip_conntrack iptable_filter ip_tables dm_mod hotkey container tsdev usbhid yenta_socket rsrc_nonstatic uhci_hcd ehci_hcd shpchp via_ircc irda crc_ccitt
>>> [ 4788.218995] Pid: 19002, comm: ssh Tainted: G   M  2.6.13-rc5
>>
>> Which of your modules is non-GPL and can you please remove them and see if
>> there's still a problem?
> Hmm. I occasionally use out-of-tree drivers (wlan cards mainly) so I
> thought these could be the culprit, but all the above are in the source
> tree (I keep the others out):
> lsmod | awk '{print $1".ko"}' | sed 's+_+-+g' | xargs -n 1
> find /lib/modules/2.6.13-rc5 -type f -name
> /lib/modules/2.6.13-rc5/kernel/drivers/char/lp.ko
> /lib/modules/2.6.13-rc5/kernel/drivers/parport/parport.ko
> /lib/modules/2.6.13-rc5/kernel/drivers/i2c/chips/eeprom.ko
> /lib/modules/2.6.13-rc5/kernel/drivers/i2c/i2c-sensor.ko
> /lib/modules/2.6.13-rc5/kernel/drivers/i2c/busses/i2c-viapro.ko
> /lib/modules/2.6.13-rc5/kernel/drivers/i2c/i2c-dev.ko
> /lib/modules/2.6.13-rc5/kernel/drivers/i2c/i2c-core.ko
> /lib/modules/2.6.13-rc5/kernel/net/bluetooth/rfcomm/rfcomm.ko
> /lib/modules/2.6.13-rc5/kernel/net/bluetooth/l2cap.ko
> /lib/modules/2.6.13-rc5/kernel/net/bluetooth/bluetooth.ko
> /lib/modules/2.6.13-rc5/kernel/net/sunrpc/sunrpc.ko
> /lib/modules/2.6.13-rc5/kernel/drivers/md/dm-mod.ko
> /lib/modules/2.6.13-rc5/kernel/drivers/acpi/hotkey.ko
> /lib/modules/2.6.13-rc5/kernel/drivers/acpi/container.ko
> /lib/modules/2.6.13-rc5/kernel/drivers/input/tsdev.ko
> /lib/modules/2.6.13-rc5/kernel/drivers/usb/input/usbhid.ko
> /lib/modules/2.6.13-rc5/kernel/drivers/usb/host/uhci-hcd.ko
> /lib/modules/2.6.13-rc5/kernel/drivers/usb/host/ehci-hcd.ko
> /lib/modules/2.6.13-rc5/kernel/drivers/pci/hotplug/shpchp.ko
> /lib/modules/2.6.13-rc5/kernel/drivers/net/irda/via-ircc.ko
> /lib/modules/2.6.13-rc5/kernel/net/irda/irda.ko
> /lib/modules/2.6.13-rc5/kernel/lib/crc-ccitt.ko
> (iptables ones omitted)
>
> Is there an *easy* way to figure out what is tainting my kernel?

Check dmesg.

> I removed all I could (whilst leaving the machine usable):
> # lsmod
> Module                  Size  Used by
> tsdev                   8832  0
> usbhid                 48992  0
> uhci_hcd               36000  0
> parport_pc             44080  0
> parport                42444  1 parport_pc
> i2c_sensor              3840  0
> i2c_core               25048  1 i2c_sensor
> l2cap                  29704  2
> bluetooth              56516  3 l2cap
> sunrpc                163688  1
> ipt_REJECT              6464  1
> ipt_state               2368  3
> ip_conntrack           49812  1 ipt_state
> iptable_filter          3584  1
> ip_tables              24000  3 ipt_REJECT,ipt_state,iptable_filter
> yenta_socket           25804  4
> rsrc_nonstatic         13376  1 yenta_socket
> irda                  210924  0
> crc_ccitt               2560  1 irda
>

You need to make sure the non-GPL module is not installed.
In other words it doesn't do any good to remove it later.
The kernel will still report "Tainted".

> tsdev                   8832  0
   ^^^^___ This doesen't seem to be a "standard" module. Maybe
it doesn't have a GPL compatible "license string".

`strings ../wherever/tsdev.ko` | grep GPL .....


> # cat /proc/sys/kernel/tainted
> 16
> Even figuring out the definition of the 'tainted' masks took a bit of
> googling.
>
> Thanks
> Antoine
>

Cheers,
Dick Johnson
Penguin : Linux version 2.6.12 on an i686 machine (5537.79 BogoMips).
Warning : 98.36% of all statistics are fiction.
.
I apologize for the following. I tried to kill it with the above dot :

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Re: preempt with selinux NULL pointer dereference

[Marc Ballarin]

On Fri, 05 Aug 2005 17:46:13 +0100
Antoine Martin <antoine@nagafix.co.uk> wrote:

> > > [ 4788.218995] Pid: 19002, comm: ssh Tainted: G   M  2.6.13-rc5
> > 
> > Which of your modules is non-GPL and can you please remove them and see if 
> > there's still a problem?
> Hmm. I occasionally use out-of-tree drivers (wlan cards mainly) so I
> thought these could be the culprit, but all the above are in the source
> tree (I keep the others out):

>From Documentation/oops-tracing.txt:
'G' if all modules loaded have a GPL or compatible license, 'P' if
 any proprietary module has been loaded.
...

In other words, your kernel is tainted, but all modules are GPL.

See also the check in panic.c:
...
tainted & TAINT_PROPRIETARY_MODULE ? 'P' : 'G',
...

It seems that yout kernel was tainted by a machine check exception (MCE).
This should be visible in dmesg somewhere, and might indicate a hardware
problem.

Regards

Re: preempt with selinux NULL pointer dereference

[Dave Jones]

On Fri, Aug 05, 2005 at 01:19:40PM -0400, linux-os (Dick Johnson) wrote:
 > 
 > > tsdev                   8832  0
 >    ^^^^___ This doesen't seem to be a "standard" module. Maybe
 > it doesn't have a GPL compatible "license string".

Bzzzzzt.

(linux-2.6.12)$ grep GPL drivers/input/tsdev.c
MODULE_LICENSE("GPL");

That's the touchscreen driver.

		Dave

Re: preempt with selinux NULL pointer dereference

[linux-os (Dick Johnson)]

On Fri, 5 Aug 2005, Dave Jones wrote:

> On Fri, Aug 05, 2005 at 01:19:40PM -0400, linux-os (Dick Johnson) wrote:
> >
> > > tsdev                   8832  0
> >    ^^^^___ This doesen't seem to be a "standard" module. Maybe
> > it doesn't have a GPL compatible "license string".
>
> Bzzzzzt.
>
> (linux-2.6.12)$ grep GPL drivers/input/tsdev.c
> MODULE_LICENSE("GPL");
>
> That's the touchscreen driver.
>
> 		Dave
>

Yep. Just nothing I recognized. Other stuff shown from `lsmod`
is pretty standard. It's possible he removed the offender, which
still leaves in /proc/sys/kernel/tainted non-zero.

Cheers,
Dick Johnson
Penguin : Linux version 2.6.12 on an i686 machine (5537.79 BogoMips).
Warning : 98.36% of all statistics are fiction.
.
I apologize for the following. I tried to kill it with the above dot :

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