modprobe failed: digest_null

modprobe failed: digest_null

[martin f krafft]

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I am seeing many messages like

  kernel: request_module: failed /sbin/modprobe -- digest_null. error = 256

in my logs. What's the nature of these?

Thanks,

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Re: modprobe failed: digest_null

[Randy.Dunlap]

On Tue, 13 Jan 2004 22:53:55 +0100 martin f krafft <madduck@madduck.net> wrote:

| I am seeing many messages like
| 
|   kernel: request_module: failed /sbin/modprobe -- digest_null. error = 256
| 
| in my logs. What's the nature of these?

Any other possibly related messages in the logs?

What kernel version?  like 2.4.2x ??  other patches applied?
[not 2.6.x since modprobe is being used]


--
~Randy
MOTD:  Always include version info.

Re: modprobe failed: digest_null

[martin f krafft]

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also sprach Randy.Dunlap <rddunlap@osdl.org> [2004.01.13.2330 +0100]:
> Any other possibly related messages in the logs?

it's IPsec related since it always appears together with racoon
entries

> What kernel version?  like 2.4.2x ??  other patches applied?
> [not 2.6.x since modprobe is being used]

2.6.1 in fact.

why is modprobe not being using in 2.6.x anymore?

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Re: modprobe failed: digest_null

[Randy.Dunlap]

On Tue, 13 Jan 2004 23:37:39 +0100 martin f krafft <madduck@madduck.net> wrote:

| also sprach Randy.Dunlap <rddunlap@osdl.org> [2004.01.13.2330 +0100]:
| > Any other possibly related messages in the logs?
| 
| it's IPsec related since it always appears together with racoon
| entries

It seems to be related to an alias that has no module definition.

| > What kernel version?  like 2.4.2x ??  other patches applied?
| > [not 2.6.x since modprobe is being used]
| 
| 2.6.1 in fact.
| 
| why is modprobe not being using in 2.6.x anymore?

Sorry, I screwed that up.  modprobe is stil around, it's just a
different modprobe.
But that messages appears in modutils and not in module-init-tools
AFAICT.

I would guess that you have a high-priority $PATH to old modprobe
than to the new modprobe...

--
~Randy
MOTD:  Always include version info.

Re: modprobe failed: digest_null

[martin f krafft]

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also sprach Randy.Dunlap <rddunlap@osdl.org> [2004.01.13.2341 +0100]:
> I would guess that you have a high-priority $PATH to old modprobe
> than to the new modprobe...

That would surprise me, Debian handles this quite well:

diamond:~# which modprobe
/sbin/modprobe
diamond:~# modprobe -V
module-init-tools version 3.0-pre5
diamond:~# modprobe.modutils -V
modprobe version 2.4.26
modprobe: QM_MODULES: Function not implemented
diamond:~# uname -r
2.6.1

PS: I would appreciate not being CC'd on list mail.

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Re: modprobe failed: digest_null

[Randy.Dunlap]

On Tue, 13 Jan 2004 23:50:47 +0100 martin f krafft <madduck@madduck.net> wrote:

| also sprach Randy.Dunlap <rddunlap@osdl.org> [2004.01.13.2341 +0100]:
| > I would guess that you have a high-priority $PATH to old modprobe
| > than to the new modprobe...
| 
| That would surprise me, Debian handles this quite well:
| 
| diamond:~# which modprobe
| /sbin/modprobe
| diamond:~# modprobe -V
| module-init-tools version 3.0-pre5
| diamond:~# modprobe.modutils -V
| modprobe version 2.4.26
| modprobe: QM_MODULES: Function not implemented
| diamond:~# uname -r
| 2.6.1

OK, maybe someone else has an answer then.

The message:
kernel: request_module: failed /sbin/modprobe -- digest_null. error = 256
is from modutils and not from module-init-tools according to my
source files.

--
~Randy
MOTD:  Always include version info.

Re: modprobe failed: digest_null

[David Rees]

On Tue, January 13, 2004 at 3:03 pm, Randy.Dunlap wrote:
>
> OK, maybe someone else has an answer then.
>
> The message:
> kernel: request_module: failed /sbin/modprobe -- digest_null. error = 256
> is from modutils and not from module-init-tools according to my
> source files.

I'm getting similar messages from dmesg after upgrading to 2.6.1, too:

request_module: failed /sbin/modprobe -- n. error = 256

[drees@summit drees]$ /sbin/modprobe -V
module-init-tools version 3.0-pre5
[drees@summit drees]$

Running on Fedora Core 1 compiled with gcc 3.3.2.  Didn't see these with
2.6.0.

-Dave

Re: modprobe failed: digest_null

[Randy.Dunlap]

On Tue, 13 Jan 2004 15:38:45 -0800 (PST) "David Rees" <drees@greenhydrant.com> wrote:

| On Tue, January 13, 2004 at 3:03 pm, Randy.Dunlap wrote:
| >
| > OK, maybe someone else has an answer then.
| >
| > The message:
| > kernel: request_module: failed /sbin/modprobe -- digest_null. error = 256
| > is from modutils and not from module-init-tools according to my
| > source files.
| 
| I'm getting similar messages from dmesg after upgrading to 2.6.1, too:
| 
| request_module: failed /sbin/modprobe -- n. error = 256
| 
| [drees@summit drees]$ /sbin/modprobe -V
| module-init-tools version 3.0-pre5
| [drees@summit drees]$
| 
| Running on Fedora Core 1 compiled with gcc 3.3.2.  Didn't see these with
| 2.6.0.

Yes, I see a couple of similar messages:

request_module: failed /sbin/modprobe -- parport_lowlevel. error = -16
request_module: failed /sbin/modprobe -- fb0. error = 256

...?

--
~Randy
MOTD:  Always include version info.

Re: modprobe failed: digest_null

[Randy.Dunlap]

On Tue, 13 Jan 2004 16:01:31 -0800 "Randy.Dunlap" <rddunlap@osdl.org> wrote:

| On Tue, 13 Jan 2004 15:38:45 -0800 (PST) "David Rees" <drees@greenhydrant.com> wrote:
| 
| | On Tue, January 13, 2004 at 3:03 pm, Randy.Dunlap wrote:
| | >
| | > OK, maybe someone else has an answer then.
| | >
| | > The message:
| | > kernel: request_module: failed /sbin/modprobe -- digest_null. error = 256
| | > is from modutils and not from module-init-tools according to my
| | > source files.
| | 
| | I'm getting similar messages from dmesg after upgrading to 2.6.1, too:
| | 
| | request_module: failed /sbin/modprobe -- n. error = 256
| | 
| | [drees@summit drees]$ /sbin/modprobe -V
| | module-init-tools version 3.0-pre5
| | [drees@summit drees]$
| | 
| | Running on Fedora Core 1 compiled with gcc 3.3.2.  Didn't see these with
| | 2.6.0.
| 
| Yes, I see a couple of similar messages:
| 
| request_module: failed /sbin/modprobe -- parport_lowlevel. error = -16
| request_module: failed /sbin/modprobe -- fb0. error = 256
| 
| ...?

I don't think that it's related to IPsec since I'm not using that.

I'm looking at the changes in kernel/kmod.c for 2.6.1 to see if they
could cause it.

--
~Randy
MOTD:  Always include version info.

Re: modprobe failed: digest_null

[martin f krafft]

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also sprach David Rees <drees@greenhydrant.com> [2004.01.14.0038 +0100]:
> Running on Fedora Core 1 compiled with gcc 3.3.2.  Didn't see these with
> 2.6.0.

Neither did I. Are you running IPsec?

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Re: modprobe failed: digest_null

[David Rees]

On Tue, January 13, 2004 at 4:08 pm, martin f krafft wrote:
> also sprach David Rees <drees@greenhydrant.com> [2004.01.14.0038 +0100]:
>> Running on Fedora Core 1 compiled with gcc 3.3.2.  Didn't see these with
>> 2.6.0.
>
> Neither did I. Are you running IPsec?

No IPsec, though I do have the crypto stuff compiled as modules.

-Dave

Re: modprobe failed: digest_null

[Randy.Dunlap]

On Tue, 13 Jan 2004 15:38:45 -0800 (PST) "David Rees" <drees@greenhydrant.com> wrote:

> kernel: request_module: failed /sbin/modprobe -- digest_null. error = 256

Chris Wright tells me that this is a null digest crypto plugin
for testing.  It might show up in your /etc/modprobe.conf file
(or it might not).
 
| request_module: failed /sbin/modprobe -- n. error = 256

This is looking for a module named "n".  Don't know where that
comes from.

In both cases, error = 256 is 0x100, which is the value returned
from kernel/kmod.c::call_usermodehelper(), which execs /sbin/modprobe
in this case.  /sbin/modprobe does exit(1) for modules that are
not found, and that 1 becomes 0x100 in call_usermodehelper().


| Running on Fedora Core 1 compiled with gcc 3.3.2.  Didn't see these with
| 2.6.0.


and I wrote yesterday:
| request_module: failed /sbin/modprobe -- parport_lowlevel. error = -16

This one comes from drivers/char/lp.c::lp_init() calling
parport_register_driver(), which calls get_lowlevel_driver(),
which calls request_module("parport_lowlevel").
Since I have lp.o and parport code built into the kernel image,
these calls happen during early init, before <system_running>
is set to 1, so call_usermodehelper() returns -EBUSY (-16 on x86).

| request_module: failed /sbin/modprobe -- fb0. error = 256

Same as first case above, but for a framebuffer device.

I don't know what needs to be done about these, if anything.

Comments, suggestions?

--
~Randy

Re: modprobe failed: digest_null

[Stian Jordet]

tor, 15.01.2004 kl. 00.48 skrev Randy.Dunlap:
> I don't know what needs to be done about these, if anything.

As Steve Youngs wrote a couple of days ago:

install <modulename> /bin/true

in your modprobe.conf will get rid of the messages,
if you find them annoying.

Best regards,
Stian

Re: modprobe failed: digest_null

[martin f krafft]

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also sprach Randy.Dunlap <rddunlap@osdl.org> [2004.01.15.0048 +0100]:
> > kernel: request_module: failed /sbin/modprobe -- digest_null. error = 256
> 
> Chris Wright tells me that this is a null digest crypto plugin
> for testing.  It might show up in your /etc/modprobe.conf file
> (or it might not).

i don't see such a module in the kernel config. there is the null
encryption, but it's not a null digest.

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Re: modprobe failed: digest_null

[Steve Youngs]

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* Randy Dunlap <Randy.Dunlap> writes:

  > The message:
  > kernel: request_module: failed /sbin/modprobe -- digest_null. error = 256
  > is from modutils and not from module-init-tools according to my
  > source files.

Your correct about where this message _doesn't_ come from, but not
about where it _does_ come from...

,----[ ./kernel/kmod.c -- lines 113 - 115 ]
| printk(KERN_DEBUG
|        "request_module: failed %s -- %s. error = %d\n",
|        modprobe_path, module_name, ret);
`----


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Re: modprobe failed: digest_null

[Randy.Dunlap]

On Wed, 14 Jan 2004 11:26:00 +1000 Steve Youngs <sryoungs@bigpond.net.au> wrote:

| * Randy Dunlap <Randy.Dunlap> writes:
| 
|   > The message:
|   > kernel: request_module: failed /sbin/modprobe -- digest_null. error = 256
|   > is from modutils and not from module-init-tools according to my
|   > source files.
| 
| Your correct about where this message _doesn't_ come from, but not
| about where it _does_ come from...
| 
| ,----[ ./kernel/kmod.c -- lines 113 - 115 ]
| | printk(KERN_DEBUG
| |        "request_module: failed %s -- %s. error = %d\n",
| |        modprobe_path, module_name, ret);
| `----

Yes, I found that and am digging into it, but I'm close to end-of-day,
so someone else can pick it up soon...


--
~Randy
MOTD:  Always include version info.

Re: modprobe failed: digest_null

[martin f krafft]

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also sprach Randy.Dunlap <rddunlap@osdl.org> [2004.01.14.0231 +0100]:
> Yes, I found that and am digging into it, but I'm close to
> end-of-day, so someone else can pick it up soon...

I appreciate your time, Randy!

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Re: modprobe failed: digest_null

[Martin Schlemmer]

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On Wed, 2004-01-14 at 01:03, Randy.Dunlap wrote:
> On Tue, 13 Jan 2004 23:50:47 +0100 martin f krafft <madduck@madduck.net> wrote:
> 
> | also sprach Randy.Dunlap <rddunlap@osdl.org> [2004.01.13.2341 +0100]:
> | > I would guess that you have a high-priority $PATH to old modprobe
> | > than to the new modprobe...
> | 
> | That would surprise me, Debian handles this quite well:
> | 
> | diamond:~# which modprobe
> | /sbin/modprobe
> | diamond:~# modprobe -V
> | module-init-tools version 3.0-pre5
> | diamond:~# modprobe.modutils -V
> | modprobe version 2.4.26
> | modprobe: QM_MODULES: Function not implemented
> | diamond:~# uname -r
> | 2.6.1
> 
> OK, maybe someone else has an answer then.
> 
> The message:
> kernel: request_module: failed /sbin/modprobe -- digest_null. error = 256
> is from modutils and not from module-init-tools according to my
> source files.
> 

Its from the kernel afaik.  It calls modprobe, fails, and then prints
its own custom message.  He basically just have something that tries
to load a module with alias 'digest_null', but there is no such module,
so fails.

I have the same thing when I open gnome-mixer:

--
request_module: failed /sbin/modprobe -- sound-slot-1. error = 256
--

as I only have one sound card ...


Cheers,

-- 
Martin Schlemmer

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Re: modprobe failed: digest_null

[Rusty Russell]

On Tue, 13 Jan 2004 22:53:55 +0100
martin f krafft <madduck@madduck.net> wrote:

> I am seeing many messages like
> 
>   kernel: request_module: failed /sbin/modprobe -- digest_null. error = 256
> 
> in my logs. What's the nature of these?

Upgrade module-init-tools to 0.9.14 or one of the 3.0 -pres.

Old "modprobe -q" fails when presented with a module it has never heard of.

Cheers,
Rusty.
-- 
   there are those who do and those who hang on and you don't see too
   many doers quoting their contemporaries.  -- Larry McVoy

Re: modprobe failed: digest_null

[martin f krafft]

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also sprach Rusty Russell <rusty@rustcorp.com.au> [2004.01.15.0022 +0100]:
> Upgrade module-init-tools to 0.9.14 or one of the 3.0 -pres.

diamond:~# modprobe -V
module-init-tools version 3.0-pre5

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Re: modprobe failed: digest_null

[Randy.Dunlap]

On Thu, 15 Jan 2004 09:08:15 +0100 martin f krafft <madduck@madduck.net> wrote:

| also sprach Rusty Russell <rusty@rustcorp.com.au> [2004.01.15.0022 +0100]:
| > Upgrade module-init-tools to 0.9.14 or one of the 3.0 -pres.
| 
| diamond:~# modprobe -V
| module-init-tools version 3.0-pre5

Yes, and I'm using 0.9.14 and seeing similar messages.

--
~Randy

Re: modprobe failed: digest_null

[Andreas Schrell]

i am quite sure this message comes from freeswan 2.04.

programs/pluto/kernel_netlink.c:        { SADB_X_AALG_NULL, "digest_null" },

Think it could be fixed by replacing digest_null with crypto_null (or modprobing
crypto_null manually before starting freeswan) but then the next problem with

kernel: request_module: failed /sbin/modprobe -- ripemd160. error = 256

from same freeswan source file...

Andreas

PS: sorry, Randy for dublette...

> On Thu, 15 Jan 2004 09:08:15 +0100 martin f krafft <madduck@madduck.net> wrote:
>
> | also sprach Rusty Russell <rusty@rustcorp.com.au> [2004.01.15.0022 +0100]:
> | > Upgrade module-init-tools to 0.9.14 or one of the 3.0 -pres.
> |
> | diamond:~# modprobe -V
> | module-init-tools version 3.0-pre5
>
> Yes, and I'm using 0.9.14 and seeing similar messages.
>
> --
> ~Randy
> -
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Re: modprobe failed: digest_null

[Rusty Russell]

In message <20040115083050.333bb13d.rddunlap@osdl.org> you write:
> On Thu, 15 Jan 2004 09:08:15 +0100 martin f krafft <madduck@madduck.net> wrot
e:
> 
> | also sprach Rusty Russell <rusty@rustcorp.com.au> [2004.01.15.0022 +0100]:
> | > Upgrade module-init-tools to 0.9.14 or one of the 3.0 -pres.
> | 
> | diamond:~# modprobe -V
> | module-init-tools version 3.0-pre5
> 
> Yes, and I'm using 0.9.14 and seeing similar messages.

Yes, as several people have pointed out.  I *did* briefly make the
change so -q always returned "success", but had to revert it because
it caused infinite loops in some legitimate configurations (thanks to
Jamie Lokier for reporting this).

With the change to default to idemptent behavior (modprobe foo when
foo is already installed silently "succeeds" unless --first-time is
specified), the definition of -q can be safely changed to mean "ignore
this if you've never heard of it").

This is done in 3.0-pre6, now available.

BTW, if you had fairly complex modules.conf, you should regenerate
modprobe.conf for the 3.0 releases: some cases have changed.

Rusty.
--
  Anyone who quotes me in their sig is an idiot. -- Rusty Russell.