samba 4.5.0-1 dumping core

tnewark · 2016-09-10 12:01:13

My server updated to this version of samba today and began dumpling core when attempting to start.

After investigating, I found that tevent was updated to 0.9.30 as well.

The problem is with tevent.(seen in the stacktrace) When I rolled it back to 0.9.29, all was well.

I noticed on the gentoo forums that someone had the same issue and the same solution.

mnts · 2016-09-10 19:34:52

Thank you so much. Spent an hour trying to resolve this.

Alad · 2016-09-10 19:37:27

https://bugs.archlinux.org/task/50728

Last edited by Alad (2016-09-10 19:38:51)

Buddlespit · 2016-09-10 21:52:11

Thank you! I was pulling my hair out.

As an aside, if I'm allowed, ntlm ('sec=ntlm' in fstab or .mount systemd file) was turned off for the sake of security in 4.5. That's something else to fix (remove) if you use it to mount a secure share. Another hair puller.

Last edited by Buddlespit (2016-09-11 02:07:18)

cequalspid · 2016-09-10 22:12:20

Same issue after upgrading samba today.
SAMBA — samba crashing on start up INTERNAL ERROR: Signal 11
Now as a new arch and early linux user I will try to roll back a package for the first time. *Done, using downgrader and samba is up and running again.

Last edited by cequalspid (2016-09-10 22:23:27)

firekage · 2016-09-10 22:44:55

Confirmed. I have been trying to figure out what is happening with my 3 machines that runs samba and have samba shares after upgrading all of them. Could not browse samba shares, see samba shares, even could not see workgroups. It workes for a moment when i manually restarted samba, and than for a moment workgroup was found, and than all was lost. Jeeez, almost half day and wasted...this is the second big bug that is related to samba - later with kio package i could now write to samba shares...

thed0g · 2016-09-11 12:27:44

Despite downgrading tevent which resulted in samba to be run, I had issues accessing files in the share with the WD TV Live home media streamer. The media player stated there are no media files available in the share. Accessing the share was no issue with Windows 10 client.

After downgrading to 4.4.5-2 (packages samba-4.4.5-2-arm, smbclient-4.4.5-2-arm and libwbclient-4.4.5-2-arm), media player found media files again without problems. So it might be that the tevent downgrade in question has issues with such media player OR what could be even worse, the media player has issues with samba 4.5, which remain to be seen.

Buddlespit · 2016-09-11 13:02:34

thed0g wrote:

Despite downgrading tevent which resulted in samba to be run, I had issues accessing files in the share with the WD TV Live home media streamer. The media player stated there are no media files available in the share. Accessing the share was no issue with Windows 10 client.
After downgrading to 4.4.5-2 (packages samba-4.4.5-2-arm, smbclient-4.4.5-2-arm and libwbclient-4.4.5-2-arm), media player found media files again without problems. So it might be that the tevent downgrade in question has issues with such media player OR what could be even worse, the media player has issues with samba 4.5, which remain to be seen.

Do you know what media player your WD TV Live home media streamer uses/ is based on/ is compiled from? My raspberry pi 3's, running OSMC (Kodi), pick up my media shares just fine. My android phones (VLC and file explorer), Win7&10 (WinExplorer/WMP&VLC) boxes and Linux boxes (Dolphin/VLC) all see the server just fine (now that I downgraded tevent).

cod3poet · 2016-09-11 13:19:24

Just in case we have anyone who does not know how to downgrade the commands are as follows:

cd /var/cache/pacman/pkg/
pacman -U tevent-0.9.29-1-x86_64.pkg.tar.xz

The above will work for 64bit arch if you have the previous version installed.

Otherwise the old versions (including 32 bit) can be found at one of the mirrors in your country

https://www.archlinux.org/download/

hamelg · 2016-09-11 16:19:34

thed0g wrote:

Despite downgrading tevent which resulted in samba to be run, I had issues accessing files in the share with the WD TV Live home media streamer. The media player stated there are no media files available in the share. Accessing the share was no issue with Windows 10 client.
After downgrading to 4.4.5-2 (packages samba-4.4.5-2-arm, smbclient-4.4.5-2-arm and libwbclient-4.4.5-2-arm), media player found media files again without problems. So it might be that the tevent downgrade in question has issues with such media player OR what could be even worse, the media player has issues with samba 4.5, which remain to be seen.

From samba 4.5.0 Release notes
http://fossies.org/linux/samba/WHATSNEW.txt

10 UPGRADING
   11 =========
   12 
   13 NTLMv1 authentication disabled by default
   14 -----------------------------------------
   15 
   16 In order to improve security we have changed
   17 the default value for the "ntlm auth" option from
   18 "yes" to "no". This may have impact on very old
   19 clients which doesn't support NTLMv2 yet.
   20 
   21 The primary user of NTLMv1 is MSCHAPv2 for VPNs and 802.1x.
   22 
   23 By default, Samba will only allow NTLMv2 via NTLMSSP now,
   24 as we have the following default "lanman auth = no",
   25 "ntlm auth = no" and "raw NTLMv2 auth = no".

perhaps also related to this change ?

thed0g · 2016-09-11 20:04:02

hamelg wrote:

thed0g wrote:
Despite downgrading tevent which resulted in samba to be run, I had issues accessing files in the share with the WD TV Live home media streamer. The media player stated there are no media files available in the share. Accessing the share was no issue with Windows 10 client.
After downgrading to 4.4.5-2 (packages samba-4.4.5-2-arm, smbclient-4.4.5-2-arm and libwbclient-4.4.5-2-arm), media player found media files again without problems. So it might be that the tevent downgrade in question has issues with such media player OR what could be even worse, the media player has issues with samba 4.5, which remain to be seen.
From samba 4.5.0 Release notes
http://fossies.org/linux/samba/WHATSNEW.txt
10 UPGRADING
   11 =========
   12 
   13 NTLMv1 authentication disabled by default
   14 -----------------------------------------
   15 
   16 In order to improve security we have changed
   17 the default value for the "ntlm auth" option from
   18 "yes" to "no". This may have impact on very old
   19 clients which doesn't support NTLMv2 yet.
   20 
   21 The primary user of NTLMv1 is MSCHAPv2 for VPNs and 802.1x.
   22 
   23 By default, Samba will only allow NTLMv2 via NTLMSSP now,
   24 as we have the following default "lanman auth = no",
   25 "ntlm auth = no" and "raw NTLMv2 auth = no".
perhaps also related to this change ?

So far I'm understanding this change, it would result in failing to login to the server. But it logged in fine, it just failed to list any content of the share displaying "No media files" message.

thed0g · 2016-09-11 20:13:24

Buddlespit wrote:

thed0g wrote:
Despite downgrading tevent which resulted in samba to be run, I had issues accessing files in the share with the WD TV Live home media streamer. The media player stated there are no media files available in the share. Accessing the share was no issue with Windows 10 client.
After downgrading to 4.4.5-2 (packages samba-4.4.5-2-arm, smbclient-4.4.5-2-arm and libwbclient-4.4.5-2-arm), media player found media files again without problems. So it might be that the tevent downgrade in question has issues with such media player OR what could be even worse, the media player has issues with samba 4.5, which remain to be seen.
Do you know what media player your WD TV Live home media streamer uses/ is based on/ is compiled from? My raspberry pi 3's, running OSMC (Kodi), pick up my media shares just fine. My android phones (VLC and file explorer), Win7&10 (WinExplorer/WMP&VLC) boxes and Linux boxes (Dolphin/VLC) all see the server just fine (now that I downgraded tevent).

That would be a pain in the ass to figure out, since those are basically black boxes and also without software support since 2012.

hamelg · 2016-09-11 21:03:24

thed0g wrote:

So far I'm understanding this change, it would result in failing to login to the server. But it logged in fine, it just failed to list any content of the share displaying "No media files" message.

You could put smbd in debug mode to figure out what's wrong : smbcontrol smbd debug 3

cod3poet · 2016-09-12 03:40:27

Just as an update looks like there was a new build of samba and libs

https://www.archlinux.org/packages/extra/x86_64/samba/
https://www.archlinux.org/packages/extra/x86_64/tevent/

Thanks Tobias!

pacman -Syu and everything is working again.

WFV · 2016-09-12 05:45:25

smbclient-4.5.0-1 installed tevent-0.9.30-1, which gave me no problems, then next -Syu, samba and smbclient-4.5.0-2 upgrade wanted tevent-0.9.29-1 (strange, wanted a regression)

:: Starting full system upgrade...
warning: tevent: local (0.9.30-1) is newer than extra (0.9.29-2)

so smbd and nmbd segfault with samba and smbclient-4.5.0-2 and tevent-0.9.30-1 but work fine with tevent-0.9.29-1 and vs versa, the previous version of samba & smbclient worked fine with the newer version of tevent. Rolling back samba and smbclient continued to segfault, re-upgrading them and then rolling back tevent as others mentioned no more segfaults. and all Windows and Google TV shares and streaming no problem.

basica · 2016-09-12 08:39:22

WFV wrote:

smbclient-4.5.0-1 installed tevent-0.9.30-1, which gave me no problems, then next -Syu, samba and smbclient-4.5.0-2 upgrade wanted tevent-0.9.29-1 (strange, wanted a regression)
:: Starting full system upgrade...
warning: tevent: local (0.9.30-1) is newer than extra (0.9.29-2)
so smbd and nmbd segfault with samba and smbclient-4.5.0-2 and tevent-0.9.30-1 but work fine with tevent-0.9.29-1 and vs versa, the previous version of samba & smbclient worked fine with the newer version of tevent. Rolling back samba and smbclient continued to segfault, re-upgrading them and then rolling back tevent as others mentioned no more segfaults. and all Windows and Google TV shares and streaming no problem.

Though my samba is working fine, I'm also getting the tevent warning. Is this some sort of bug in the packaging perhaps?

R00KIE · 2016-09-12 09:30:12

Do 'pacman -Syuu' and it should install the version in the repos. The version in the repos was rolled back and as such pacman will not install it automatically since it is an older version. There is a way to make it happen when using only -Syu but I suppose the maintainer of the package decided not to make use of it (or didn't remember).

thed0g · 2016-09-12 14:55:42

hamelg wrote:

thed0g wrote:
So far I'm understanding this change, it would result in failing to login to the server. But it logged in fine, it just failed to list any content of the share displaying "No media files" message.
You could put smbd in debug mode to figure out what's wrong : smbcontrol smbd debug 3

Cheers for the tip, you were correct - it was this change. After updating tevent and samba, I debugged the login.

2016/09/12 16:31:06.900261,  2, pid=14793, effective(0, 0), real(0, 0)] ../libcli/auth/ntlm_check.c:424(ntlm_password_check)
  ntlm_password_check: NTLMv1 passwords NOT PERMITTED for user john

But WDTV still logged in somehow, just failed to load the directory content.

[2016/09/12 16:31:06.909002,  3, pid=14793, effective(0, 0), real(0, 0), class=auth] ../source3/auth/auth.c:178(auth_check_ntlm_password)
  check_ntlm_password:  Checking password for unmapped user []\[]@[] with the new password interface
[2016/09/12 16:31:06.909134,  3, pid=14793, effective(0, 0), real(0, 0), class=auth] ../source3/auth/auth.c:181(auth_check_ntlm_password)
  check_ntlm_password:  mapped user is: [POGO]\[]@[]
[2016/09/12 16:31:06.909297,  3, pid=14793, effective(0, 0), real(0, 0), class=auth] ../source3/auth/auth.c:249(auth_check_ntlm_password)
  check_ntlm_password: guest authentication for user [] succeeded

Which obviously resulted in failing to show any content.

After I've put

ntlm auth = yes

to smb.conf, it was working again.

[2016/09/12 16:36:40.696729,  3, pid=14820, effective(0, 0), real(0, 0), class=auth] ../source3/auth/auth.c:178(auth_check_ntlm_p
assword)
  check_ntlm_password:  Checking password for unmapped user [WORKGROUP]\[john]@[WDTVLIVE] with the new password interface
[2016/09/12 16:36:40.696880,  3, pid=14820, effective(0, 0), real(0, 0), class=auth] ../source3/auth/auth.c:181(auth_check_ntlm_p
assword)
  check_ntlm_password:  mapped user is: [POGO]\[john]@[WDTVLIVE]
[2016/09/12 16:36:40.697958,  3, pid=14820, effective(0, 0), real(0, 0)] ../source3/passdb/lookup_sid.c:1645(get_primary_group_sid)
  Forcing Primary Group to 'Domain Users' for john
[2016/09/12 16:36:40.699674,  3, pid=14820, effective(0, 0), real(0, 0), class=auth] ../source3/auth/auth.c:249(auth_check_ntlm_password)
  check_ntlm_password: sam authentication for user [john] succeeded
[2016/09/12 16:36:40.699896,  2, pid=14820, effective(0, 0), real(0, 0), class=auth] ../source3/auth/auth.c:305(auth_check_ntlm_password)
  check_ntlm_password:  authentication for user [john] -> [john] -> [john] succeeded

I bet this will confuse quite some users with these kind of older hardware, perhaps adding it to Wiki wouldn't be bad.

Last edited by thed0g (2016-09-12 14:58:18)

Arch Linux

#1 2016-09-10 12:01:13

samba 4.5.0-1 dumping core

#2 2016-09-10 19:34:52

Re: samba 4.5.0-1 dumping core

#3 2016-09-10 19:37:27

Re: samba 4.5.0-1 dumping core

#4 2016-09-10 21:52:11

Re: samba 4.5.0-1 dumping core

#5 2016-09-10 22:12:20

Re: samba 4.5.0-1 dumping core

#6 2016-09-10 22:44:55

Re: samba 4.5.0-1 dumping core

#7 2016-09-11 12:27:44

Re: samba 4.5.0-1 dumping core

#8 2016-09-11 13:02:34

Re: samba 4.5.0-1 dumping core

#9 2016-09-11 13:19:24

Re: samba 4.5.0-1 dumping core

#10 2016-09-11 16:19:34

Re: samba 4.5.0-1 dumping core

#11 2016-09-11 20:04:02

Re: samba 4.5.0-1 dumping core

#12 2016-09-11 20:13:24

Re: samba 4.5.0-1 dumping core

#13 2016-09-11 21:03:24

Re: samba 4.5.0-1 dumping core

#14 2016-09-12 03:40:27

Re: samba 4.5.0-1 dumping core

#15 2016-09-12 05:45:25

Re: samba 4.5.0-1 dumping core

#16 2016-09-12 08:39:22

Re: samba 4.5.0-1 dumping core

#17 2016-09-12 09:30:12

Re: samba 4.5.0-1 dumping core

#18 2016-09-12 14:55:42

Re: samba 4.5.0-1 dumping core

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