[dm-crypt] luks, swap and crash

[dm-crypt] luks, swap and crash

[François Chenais]

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Hello,

I have some computers crashing while using crypted swap partition.

The system doesn't crash if I remove the swap.
The system crash again if I use a swap file on a crypted filesystem.

Is this a known issue ?


Thanks in advance for your "lights"

   François

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Re: [dm-crypt] luks, swap and crash

[Heinz Diehl]

On 02.05.2011, François Chenais wrote: 

> The system doesn't crash if I remove the swap.
> The system crash again if I use a swap file on a crypted filesystem.
> Is this a known issue ?

On my machines, LUKS/dmcrypt encrypted swap works flawlessly.
Could you please provide some more information on what's going on on 
your machine when this happens?

Re: [dm-crypt] luks, swap and crash

[Arno Wagner]

What do you mean by "crash"?

Arno

On Mon, May 02, 2011 at 11:50:25AM +0200, Fran?ois Chenais wrote:
> Hello,
> 
> I have some computers crashing while using crypted swap partition.
> 
> The system doesn't crash if I remove the swap.
> The system crash again if I use a swap file on a crypted filesystem.
> 
> Is this a known issue ?
> 
> 
> Thanks in advance for your "lights"
> 
>    Fran?ois

> _______________________________________________
> dm-crypt mailing list
> dm-crypt@saout.de
> http://www.saout.de/mailman/listinfo/dm-crypt


-- 
Arno Wagner, Dr. sc. techn., Dipl. Inform., CISSP -- Email: arno@wagner.name 
GnuPG:  ID: 1E25338F  FP: 0C30 5782 9D93 F785 E79C  0296 797F 6B50 1E25 338F
----
Cuddly UI's are the manifestation of wishful thinking. -- Dylan Evans

If it's in the news, don't worry about it.  The very definition of 
"news" is "something that hardly ever happens." -- Bruce Schneier 

Re: [dm-crypt] luks, swap and crash

[François Chenais]

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2011/5/2 Arno Wagner <arno@wagner.name>

> What do you mean by "crash"?
>
>
Crash = the computer is frozen, nothing happens. The only way to bring it
back to life is to power off/on.


I knew U'll ask me some logs but ... :)

  Actually, I have no logs because log files are written on encrypted file
system and the file system
  is encrypted at boot time; each time with at new unknown random key ; so I
have NO file, NO LOG, Nothing,
  as in a black hole !:P

  I don't have change anything because it's a production server.
  I need to take time to reproduce the crash on a test machine.

... but I'm interested about the list feedback about same experience.


  The system is CentOS 5.5.




> Arno
>
> On Mon, May 02, 2011 at 11:50:25AM +0200, Fran?ois Chenais wrote:
> > Hello,
> >
> > I have some computers crashing while using crypted swap partition.
> >
> > The system doesn't crash if I remove the swap.
> > The system crash again if I use a swap file on a crypted filesystem.
> >
> > Is this a known issue ?
> >
> >
> > Thanks in advance for your "lights"
> >
> >    Fran?ois
>
> > _______________________________________________
> > dm-crypt mailing list
> > dm-crypt@saout.de
> > http://www.saout.de/mailman/listinfo/dm-crypt
>
>
> --
> Arno Wagner, Dr. sc. techn., Dipl. Inform., CISSP -- Email:
> arno@wagner.name
> GnuPG:  ID: 1E25338F  FP: 0C30 5782 9D93 F785 E79C  0296 797F 6B50 1E25
> 338F
> ----
> Cuddly UI's are the manifestation of wishful thinking. -- Dylan Evans
>
> If it's in the news, don't worry about it.  The very definition of
> "news" is "something that hardly ever happens." -- Bruce Schneier
> _______________________________________________
> dm-crypt mailing list
> dm-crypt@saout.de
> http://www.saout.de/mailman/listinfo/dm-crypt
>

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Re: [dm-crypt] luks, swap and crash

[Arno Wagner]

Ok, hard freeze is not good. 

One thing you could try is a serial console. This needs only
a boot option to the kernel. 

CentOS 5.5 is also pretty recent.

Unless Milan knows what is going on here, a recreation in
a test machine would probably be the best next step.

Hmm, do you by any chance encrypt swap _twice_? 

BTW, pretty peculiar setup. I take it this machine installs 
itself from an image to the encrypted filesystem (with random 
key) on boot? JUst out of curiosity, how long does that
take?

Arno


On Mon, May 02, 2011 at 09:21:41PM +0200, Fran?ois Chenais wrote:
> 2011/5/2 Arno Wagner <arno@wagner.name>
> 
> > What do you mean by "crash"?
> >
> >
> Crash = the computer is frozen, nothing happens. The only way to bring it
> back to life is to power off/on.
> 
> 
> I knew U'll ask me some logs but ... :)
> 
>   Actually, I have no logs because log files are written on encrypted file
> system and the file system
>   is encrypted at boot time; each time with at new unknown random key ; so I
> have NO file, NO LOG, Nothing,
>   as in a black hole !:P
> 
>   I don't have change anything because it's a production server.
>   I need to take time to reproduce the crash on a test machine.
> 
> ... but I'm interested about the list feedback about same experience.
> 
> 
>   The system is CentOS 5.5.
> 
> 
> 
> 
> > Arno
> >
> > On Mon, May 02, 2011 at 11:50:25AM +0200, Fran?ois Chenais wrote:
> > > Hello,
> > >
> > > I have some computers crashing while using crypted swap partition.
> > >
> > > The system doesn't crash if I remove the swap.
> > > The system crash again if I use a swap file on a crypted filesystem.
> > >
> > > Is this a known issue ?
> > >
> > >
> > > Thanks in advance for your "lights"
> > >
> > >    Fran?ois
> >
> > > _______________________________________________
> > > dm-crypt mailing list
> > > dm-crypt@saout.de
> > > http://www.saout.de/mailman/listinfo/dm-crypt
> >
> >
> > --
> > Arno Wagner, Dr. sc. techn., Dipl. Inform., CISSP -- Email:
> > arno@wagner.name
> > GnuPG:  ID: 1E25338F  FP: 0C30 5782 9D93 F785 E79C  0296 797F 6B50 1E25
> > 338F
> > ----
> > Cuddly UI's are the manifestation of wishful thinking. -- Dylan Evans
> >
> > If it's in the news, don't worry about it.  The very definition of
> > "news" is "something that hardly ever happens." -- Bruce Schneier
> > _______________________________________________
> > dm-crypt mailing list
> > dm-crypt@saout.de
> > http://www.saout.de/mailman/listinfo/dm-crypt
> >

> _______________________________________________
> dm-crypt mailing list
> dm-crypt@saout.de
> http://www.saout.de/mailman/listinfo/dm-crypt


-- 
Arno Wagner, Dr. sc. techn., Dipl. Inform., CISSP -- Email: arno@wagner.name 
GnuPG:  ID: 1E25338F  FP: 0C30 5782 9D93 F785 E79C  0296 797F 6B50 1E25 338F
----
Cuddly UI's are the manifestation of wishful thinking. -- Dylan Evans

If it's in the news, don't worry about it.  The very definition of 
"news" is "something that hardly ever happens." -- Bruce Schneier 

Re: [dm-crypt] luks, swap and crash

[François Chenais]

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2011/5/3 Arno Wagner <arno@wagner.name>

> Ok, hard freeze is not good.
>
> One thing you could try is a serial console. This needs only
> a boot option to the kernel.
>
> CentOS 5.5 is also pretty recent.
>
>
Even if the kernel is patched, the version 2.6.18 is not so recent :P
The system used version 1.0.3 of cryptsetup :/


 Unless Milan knows what is going on here, a recreation in
> a test machine would probably be the best next step.
>
> Hmm, do you by any chance encrypt swap _twice_?
>
>
Hmmm, why _twice_ and what for ?


BTW, pretty peculiar setup. I take it this machine installs
> itself from an image to the encrypted filesystem (with random
> key) on boot? JUst out of curiosity, how long does that
> take?
>
>
Just temporary FS are encrypted. So the time spent depends of the size of
the
FS. But sure, it's not user friendly :D


François




>  Arno
>
>
> On Mon, May 02, 2011 at 09:21:41PM +0200, Fran?ois Chenais wrote:
> > 2011/5/2 Arno Wagner <arno@wagner.name>
> >
> > > What do you mean by "crash"?
> > >
> > >
> > Crash = the computer is frozen, nothing happens. The only way to bring it
> > back to life is to power off/on.
> >
> >
> > I knew U'll ask me some logs but ... :)
> >
> >   Actually, I have no logs because log files are written on encrypted
> file
> > system and the file system
> >   is encrypted at boot time; each time with at new unknown random key ;
> so I
> > have NO file, NO LOG, Nothing,
> >   as in a black hole !:P
> >
> >   I don't have change anything because it's a production server.
> >   I need to take time to reproduce the crash on a test machine.
> >
> > ... but I'm interested about the list feedback about same experience.
> >
> >
> >   The system is CentOS 5.5.
> >
> >
> >
> >
> > > Arno
> > >
> > > On Mon, May 02, 2011 at 11:50:25AM +0200, Fran?ois Chenais wrote:
> > > > Hello,
> > > >
> > > > I have some computers crashing while using crypted swap partition.
> > > >
> > > > The system doesn't crash if I remove the swap.
> > > > The system crash again if I use a swap file on a crypted filesystem.
> > > >
> > > > Is this a known issue ?
> > > >
> > > >
> > > > Thanks in advance for your "lights"
> > > >
> > > >    Fran?ois
> > >
> > > > _______________________________________________
> > > > dm-crypt mailing list
> > > > dm-crypt@saout.de
> > > > http://www.saout.de/mailman/listinfo/dm-crypt
> > >
> > >
> > > --
> > > Arno Wagner, Dr. sc. techn., Dipl. Inform., CISSP -- Email:
> > > arno@wagner.name
> > > GnuPG:  ID: 1E25338F  FP: 0C30 5782 9D93 F785 E79C  0296 797F 6B50 1E25
> > > 338F
> > > ----
> > > Cuddly UI's are the manifestation of wishful thinking. -- Dylan Evans
> > >
> > > If it's in the news, don't worry about it.  The very definition of
> > > "news" is "something that hardly ever happens." -- Bruce Schneier
> > > _______________________________________________
> > > dm-crypt mailing list
> > > dm-crypt@saout.de
> > > http://www.saout.de/mailman/listinfo/dm-crypt
> > >
>
> > _______________________________________________
> > dm-crypt mailing list
> > dm-crypt@saout.de
> > http://www.saout.de/mailman/listinfo/dm-crypt
>
>
> --
> Arno Wagner, Dr. sc. techn., Dipl. Inform., CISSP -- Email:
> arno@wagner.name
> GnuPG:  ID: 1E25338F  FP: 0C30 5782 9D93 F785 E79C  0296 797F 6B50 1E25
> 338F
> ----
> Cuddly UI's are the manifestation of wishful thinking. -- Dylan Evans
>
> If it's in the news, don't worry about it.  The very definition of
> "news" is "something that hardly ever happens." -- Bruce Schneier
> _______________________________________________
> dm-crypt mailing list
> dm-crypt@saout.de
> http://www.saout.de/mailman/listinfo/dm-crypt
>

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Re: [dm-crypt] luks, swap and crash

[Milan Broz]

On 05/03/2011 09:28 AM, François Chenais wrote:
>     CentOS 5.5 is also pretty recent.
> 
> 
> Even if the kernel is patched, the version 2.6.18 is not so recent :P
> The system used version 1.0.3 of cryptsetup :/

If it crashes or freezes during some operation the userspace is
not related here at all.
There is no known problem with kernel and encrypted swap in RHEL5.6.

You need at least process state when this happens - setup some
console and run alt-sysrq + t and post it somewhere.

For userspace - yes, cryptsetup 1.0.3 in RHEL 5.5 is old and buggy,
and there will update in 5.7.

The worst issue I know about is the cryptsetup 1.0.3 crashes with large
keys (>256bit) (because of lacking support in kernel for XTS mode,
it is not big issue)
https://bugzilla.redhat.com/show_bug.cgi?id=678011

Milan

Re: [dm-crypt] luks, swap and crash

[Arno Wagner]

On Tue, May 03, 2011 at 09:28:31AM +0200, Fran?ois Chenais wrote:
> 2011/5/3 Arno Wagner <arno@wagner.name>
> 
> > Ok, hard freeze is not good.
> >
> > One thing you could try is a serial console. This needs only
> > a boot option to the kernel.
> >
> > CentOS 5.5 is also pretty recent.
> >
> >
> Even if the kernel is patched, the version 2.6.18 is not so recent :P
> The system used version 1.0.3 of cryptsetup :/

Oops, seems my version lookup-fu is badly broken. 2.6.18 is indeed
mostly of historic interest and 1.0.3 is also pretty old.
 
>  Unless Milan knows what is going on here, a recreation in
> > a test machine would probably be the best next step.
> >
> > Hmm, do you by any chance encrypt swap _twice_?
> >
> >
> Hmmm, why _twice_ and what for ?

The idea was that maybe there is a full-disk encryptiopn 
and then a partition encryption on top.

Arno

 
> BTW, pretty peculiar setup. I take it this machine installs
> > itself from an image to the encrypted filesystem (with random
> > key) on boot? JUst out of curiosity, how long does that
> > take?
> >
> >
> Just temporary FS are encrypted. So the time spent depends of the size of
> the
> FS. But sure, it's not user friendly :D
> 
> 
> Fran?ois
> 
> 
> 
> 
> >  Arno
> >
> >
> > On Mon, May 02, 2011 at 09:21:41PM +0200, Fran?ois Chenais wrote:
> > > 2011/5/2 Arno Wagner <arno@wagner.name>
> > >
> > > > What do you mean by "crash"?
> > > >
> > > >
> > > Crash = the computer is frozen, nothing happens. The only way to bring it
> > > back to life is to power off/on.
> > >
> > >
> > > I knew U'll ask me some logs but ... :)
> > >
> > >   Actually, I have no logs because log files are written on encrypted
> > file
> > > system and the file system
> > >   is encrypted at boot time; each time with at new unknown random key ;
> > so I
> > > have NO file, NO LOG, Nothing,
> > >   as in a black hole !:P
> > >
> > >   I don't have change anything because it's a production server.
> > >   I need to take time to reproduce the crash on a test machine.
> > >
> > > ... but I'm interested about the list feedback about same experience.
> > >
> > >
> > >   The system is CentOS 5.5.
> > >
> > >
> > >
> > >
> > > > Arno
> > > >
> > > > On Mon, May 02, 2011 at 11:50:25AM +0200, Fran?ois Chenais wrote:
> > > > > Hello,
> > > > >
> > > > > I have some computers crashing while using crypted swap partition.
> > > > >
> > > > > The system doesn't crash if I remove the swap.
> > > > > The system crash again if I use a swap file on a crypted filesystem.
> > > > >
> > > > > Is this a known issue ?
> > > > >
> > > > >
> > > > > Thanks in advance for your "lights"
> > > > >
> > > > >    Fran?ois
> > > >
> > > > > _______________________________________________
> > > > > dm-crypt mailing list
> > > > > dm-crypt@saout.de
> > > > > http://www.saout.de/mailman/listinfo/dm-crypt
> > > >
> > > >
> > > > --
> > > > Arno Wagner, Dr. sc. techn., Dipl. Inform., CISSP -- Email:
> > > > arno@wagner.name
> > > > GnuPG:  ID: 1E25338F  FP: 0C30 5782 9D93 F785 E79C  0296 797F 6B50 1E25
> > > > 338F
> > > > ----
> > > > Cuddly UI's are the manifestation of wishful thinking. -- Dylan Evans
> > > >
> > > > If it's in the news, don't worry about it.  The very definition of
> > > > "news" is "something that hardly ever happens." -- Bruce Schneier
> > > > _______________________________________________
> > > > dm-crypt mailing list
> > > > dm-crypt@saout.de
> > > > http://www.saout.de/mailman/listinfo/dm-crypt
> > > >
> >
> > > _______________________________________________
> > > dm-crypt mailing list
> > > dm-crypt@saout.de
> > > http://www.saout.de/mailman/listinfo/dm-crypt
> >
> >
> > --
> > Arno Wagner, Dr. sc. techn., Dipl. Inform., CISSP -- Email:
> > arno@wagner.name
> > GnuPG:  ID: 1E25338F  FP: 0C30 5782 9D93 F785 E79C  0296 797F 6B50 1E25
> > 338F
> > ----
> > Cuddly UI's are the manifestation of wishful thinking. -- Dylan Evans
> >
> > If it's in the news, don't worry about it.  The very definition of
> > "news" is "something that hardly ever happens." -- Bruce Schneier
> > _______________________________________________
> > dm-crypt mailing list
> > dm-crypt@saout.de
> > http://www.saout.de/mailman/listinfo/dm-crypt
> >

> _______________________________________________
> dm-crypt mailing list
> dm-crypt@saout.de
> http://www.saout.de/mailman/listinfo/dm-crypt


-- 
Arno Wagner, Dr. sc. techn., Dipl. Inform., CISSP -- Email: arno@wagner.name 
GnuPG:  ID: 1E25338F  FP: 0C30 5782 9D93 F785 E79C  0296 797F 6B50 1E25 338F
----
Cuddly UI's are the manifestation of wishful thinking. -- Dylan Evans

If it's in the news, don't worry about it.  The very definition of 
"news" is "something that hardly ever happens." -- Bruce Schneier 

Re: [dm-crypt] luks, swap and crash

[Francois Chenais]

-- 
f c

Le 3 mai 2011 à 10:19, Arno Wagner <arno@wagner.name> a écrit :

> On Tue, May 03, 2011 at 09:28:31AM +0200, Fran?ois Chenais wrote:
>> 2011/5/3 Arno Wagner <arno@wagner.name>
>> 
>>> Ok, hard freeze is not good.
>>> 
>>> One thing you could try is a serial console. This needs only
>>> a boot option to the kernel.
>>> 
>>> CentOS 5.5 is also pretty recent.
>>> 
>>> 
>> Even if the kernel is patched, the version 2.6.18 is not so recent :P
>> The system used version 1.0.3 of cryptsetup :/
> 
> Oops, seems my version lookup-fu is badly broken. 2.6.18 is indeed
> mostly of historic interest and 1.0.3 is also pretty old.
> 
>> Unless Milan knows what is going on here, a recreation in
>>> a test machine would probably be the best next step.
>>> 
>>> Hmm, do you by any chance encrypt swap _twice_?
>>> 
>>> 
>> Hmmm, why _twice_ and what for ?
> 
> The idea was that maybe there is a full-disk encryptiopn 
> and then a partition encryption on top.
> 
Oki. But in this case, the swap is on a dedicated partition. No double encryption. 


> Arno
> 
> 
>> BTW, pretty peculiar setup. I take it this machine installs
>>> itself from an image to the encrypted filesystem (with random
>>> key) on boot? JUst out of curiosity, how long does that
>>> take?
>>> 
>>> 
>> Just temporary FS are encrypted. So the time spent depends of the size of
>> the
>> FS. But sure, it's not user friendly :D
>> 
>> 
>> Fran?ois
>> 
>> 
>> 
>> 
>>> Arno
>>> 
>>> 
>>> On Mon, May 02, 2011 at 09:21:41PM +0200, Fran?ois Chenais wrote:
>>>> 2011/5/2 Arno Wagner <arno@wagner.name>
>>>> 
>>>>> What do you mean by "crash"?
>>>>> 
>>>>> 
>>>> Crash = the computer is frozen, nothing happens. The only way to bring it
>>>> back to life is to power off/on.
>>>> 
>>>> 
>>>> I knew U'll ask me some logs but ... :)
>>>> 
>>>>  Actually, I have no logs because log files are written on encrypted
>>> file
>>>> system and the file system
>>>>  is encrypted at boot time; each time with at new unknown random key ;
>>> so I
>>>> have NO file, NO LOG, Nothing,
>>>>  as in a black hole !:P
>>>> 
>>>>  I don't have change anything because it's a production server.
>>>>  I need to take time to reproduce the crash on a test machine.
>>>> 
>>>> ... but I'm interested about the list feedback about same experience.
>>>> 
>>>> 
>>>>  The system is CentOS 5.5.
>>>> 
>>>> 
>>>> 
>>>> 
>>>>> Arno
>>>>> 
>>>>> On Mon, May 02, 2011 at 11:50:25AM +0200, Fran?ois Chenais wrote:
>>>>>> Hello,
>>>>>> 
>>>>>> I have some computers crashing while using crypted swap partition.
>>>>>> 
>>>>>> The system doesn't crash if I remove the swap.
>>>>>> The system crash again if I use a swap file on a crypted filesystem.
>>>>>> 
>>>>>> Is this a known issue ?
>>>>>> 
>>>>>> 
>>>>>> Thanks in advance for your "lights"
>>>>>> 
>>>>>>   Fran?ois
>>>>> 
>>>>>> _______________________________________________
>>>>>> dm-crypt mailing list
>>>>>> dm-crypt@saout.de
>>>>>> http://www.saout.de/mailman/listinfo/dm-crypt
>>>>> 
>>>>> 
>>>>> --
>>>>> Arno Wagner, Dr. sc. techn., Dipl. Inform., CISSP -- Email:
>>>>> arno@wagner.name
>>>>> GnuPG:  ID: 1E25338F  FP: 0C30 5782 9D93 F785 E79C  0296 797F 6B50 1E25
>>>>> 338F
>>>>> ----
>>>>> Cuddly UI's are the manifestation of wishful thinking. -- Dylan Evans
>>>>> 
>>>>> If it's in the news, don't worry about it.  The very definition of
>>>>> "news" is "something that hardly ever happens." -- Bruce Schneier
>>>>> _______________________________________________
>>>>> dm-crypt mailing list
>>>>> dm-crypt@saout.de
>>>>> http://www.saout.de/mailman/listinfo/dm-crypt
>>>>> 
>>> 
>>>> _______________________________________________
>>>> dm-crypt mailing list
>>>> dm-crypt@saout.de
>>>> http://www.saout.de/mailman/listinfo/dm-crypt
>>> 
>>> 
>>> --
>>> Arno Wagner, Dr. sc. techn., Dipl. Inform., CISSP -- Email:
>>> arno@wagner.name
>>> GnuPG:  ID: 1E25338F  FP: 0C30 5782 9D93 F785 E79C  0296 797F 6B50 1E25
>>> 338F
>>> ----
>>> Cuddly UI's are the manifestation of wishful thinking. -- Dylan Evans
>>> 
>>> If it's in the news, don't worry about it.  The very definition of
>>> "news" is "something that hardly ever happens." -- Bruce Schneier
>>> _______________________________________________
>>> dm-crypt mailing list
>>> dm-crypt@saout.de
>>> http://www.saout.de/mailman/listinfo/dm-crypt
>>> 
> 
>> _______________________________________________
>> dm-crypt mailing list
>> dm-crypt@saout.de
>> http://www.saout.de/mailman/listinfo/dm-crypt
> 
> 
> -- 
> Arno Wagner, Dr. sc. techn., Dipl. Inform., CISSP -- Email: arno@wagner.name 
> GnuPG:  ID: 1E25338F  FP: 0C30 5782 9D93 F785 E79C  0296 797F 6B50 1E25 338F
> ----
> Cuddly UI's are the manifestation of wishful thinking. -- Dylan Evans
> 
> If it's in the news, don't worry about it.  The very definition of 
> "news" is "something that hardly ever happens." -- Bruce Schneier 
> _______________________________________________
> dm-crypt mailing list
> dm-crypt@saout.de
> http://www.saout.de/mailman/listinfo/dm-crypt

Re: [dm-crypt] luks, swap and crash

[Milan Broz]

On 05/03/2011 10:19 AM, Arno Wagner wrote:

> Oops, seems my version lookup-fu is badly broken. 2.6.18 is indeed
> mostly of historic interest and 1.0.3 is also pretty old.

Just note: in RHEL/CentOS the base kernel version means almost nothing,
there is many backports.

We try to keep device-mapper as close upstream as possible but
for some changes is is no longer possible (because RHEL kernel keeps
ABI compatible calls).

Milan

Re: [dm-crypt] luks, swap and crash

[Francois Chenais]

-- 
f c

Le 3 mai 2011 à 11:56, Milan Broz <mbroz@redhat.com> a écrit :

> On 05/03/2011 10:19 AM, Arno Wagner wrote:
> 
>> Oops, seems my version lookup-fu is badly broken. 2.6.18 is indeed
>> mostly of historic interest and 1.0.3 is also pretty old.
> 
> Just note: in RHEL/CentOS the base kernel version means almost nothing,
> there is many backports.
> 
> We try to keep device-mapper as close upstream as possible but
> for some changes is is no longer possible (because RHEL kernel keeps
> ABI compatible calls).
Here is a link about something similar on gentoo system.


http://forums.gentoo.org/viewtopic-t-852353-start-0.html


> Milan
> _______________________________________________
> dm-crypt mailing list
> dm-crypt@saout.de
> http://www.saout.de/mailman/listinfo/dm-crypt

Re: [dm-crypt] luks, swap and crash

[Milan Broz]

> Here is a link about something similar on gentoo system.
> http://forums.gentoo.org/viewtopic-t-852353-start-0.html

Thanks, nice test... I was able to lock up older kernel with that
but 2.6.38.5 (and 2.6.39-rc) works without problems for me
(at least for this short test).

So I hope the problem was fixed upstream...
(There was big changes both in dmcrypt and workqueue subsystem.)

Please let me know if you can still lock the system this way
(with upstream kernel).


Milan