[Samba] Upgrade 4.9 -> 4.11 oups

[Denis Cardon]

Hi Andrew,

>> I decided to upgrade my fileservers from stretch/samba 4.9 to
>> buster/samba 4.11
>> I just realized that smbd is not working anymore :-/
>> If someone has an idea It would be amazing... as an idiot, I upgraded
>> my 20 servers.... without snapshot....
>> Thank you so much
>>
>> Here's some logs :
>>
>> root at ef113:~# tail /var/log/samba/log.smbd
>>    #1 /usr/lib/x86_64-linux-gnu/libsmbconf.so.0(smb_panic_s3+0x18)
>> [0x7fa495498a48]
>>    #2 /usr/lib/x86_64-linux-gnu/libsamba-util.so.0(smb_panic+0x2d)
>> [0x7fa4958d3cad]
>>    #3 /usr/lib/x86_64-linux-gnu/samba/libsmbd-base.so.0(+0x1baa9a)
>> [0x7fa4956e9a9a]
>>    #4 /usr/lib/x86_64-linux-gnu/samba/libsmbd-base.so.0(+0x1bae13)
>> [0x7fa4956e9e13]
>>    #5 /usr/lib/x86_64-linux-gnu/samba/libsmbd-
>> shim.so.0(exit_server+0x14) [0x7fa494cd9264]
>>    #6 /usr/sbin/smbd(main+0x13d2) [0x564221a6d402]
>>    #7 /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xeb)
>> [0x7fa49370209b]
>>    #8 /usr/sbin/smbd(_start+0x2a) [0x564221a6defa]
>> [2020/03/03 18:10:46.174670,  0]
>> ../../source3/lib/dumpcore.c:315(dump_core)
>>   dumping core in /var/log/samba/cores/smbd
>
> There should be more information in the logs than that, can you get
> some more context please?  Then set 'panic action =
> /path/to/gdb_backtrace %d' to point at this script:
> https://git.samba.org/?p=samba.git;a=blob_plain;f=selftest/gdb_backtrace
>
> Install the full debug packages first, so we get a good line number.

I took some time off list with Jordi to look at it more closely. It 
looks like it is exactly the same issue as the one in [1] ("[Samba] smbd 
fails to start after upgrade to version 4.11.6"). Actually it seems to 
be a build related issue, as it does show the above issue with Tranquil 
IT deb in 4.11.6 (but not with 4.11.4 deb curiously) and has no issue 
with Louis 4.11.6 deb... Since our deb are mostly recompilation from 
Louis packages, it seems to be a build env issue, and it might be the 
same issue with the raspbian packages from [1]. I'll keep you updated.

Cheers,

Denis

[1] https://lists.samba.org/archive/samba/2020-January/227973.html


>
> Thanks!
>
> Andrew Bartlett
>

-- 
Denis Cardon
Tranquil IT
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tel : +33 (0) 240 975 755
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