samba - Aug 2019 - Core dumped - net ads dns gethostbzname

Hi.

Performing a DNS search for a hostname results in a segmentation fault:




## Debian 10 Buster 64bit




root at hostxzy:~# net ads dns gethostbyname name $(hostname)
Bad talloc magic value - unknown value
PANIC (pid 15749): Bad talloc magic value - unknown value
BACKTRACE: 12 stack frames:
?#0 /lib/x86_64-linux-gnu/libsamba-util.so.0(log_stack_trace+0x32) [0x7f0827
a408d2]
?#1 /lib/x86_64-linux-gnu/libsmbconf.so.0(smb_panic_s3+0x20) [0x7f08278811c
0]
?#2 /lib/x86_64-linux-gnu/libsamba-util.so.0(smb_panic+0x2f) [0x7f0827a409
df]
?#3 /lib/x86_64-linux-gnu/libtalloc.so.2(+0x3591) [0x7f0826ceb591]
?#4 /usr/lib/x86_64-linux-gnu/samba/libaddns.so.0(dns_open_connection+0x174)
[0x7f0827d20424]
?#5 net(do_gethostbyname+0x32) [0x5567e6e4acc2]
?#6 net(+0x38a50) [0x5567e6e11a50]
?#7 net(+0x36168) [0x5567e6e0f168]
?#8 net(net_ads+0x47) [0x5567e6e16f17]
?#9 net(main+0x980) [0x5567e6dfb5b0]
?#10 /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xeb) [0x7f082686009
b]
?#11 net(_start+0x2a) [0x5567e6dfb87a]
Can not dump core: corepath not set up
root at hostxzy:~# dpkg -l winbind
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-
pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name?????????? Version??????? Architecture Description
+++-==============-==============-============-===================================================================ii?
winbind??????? 2:4.9.5+dfsg-5 amd64??????? service to resolve user and
group information from Windows NT servers
root at hostxzy:~#




Please advise.

Thank you

Zbynek

Close ..  Use/Try 

net ads dns gethostbyname dc1.internal.domain.tld $(hostname -f)

Does that work?
I'll bet it does, because, that works for me. ;-) 



Greetz, 

Louis

> -----Oorspronkelijk bericht-----
> Van: samba [mailto:samba-bounces at lists.samba.org] Namens 
> Zbynek via samba
> Verzonden: woensdag 21 augustus 2019 11:35
> Aan: L.P.H. van Belle via samba
> Onderwerp: [Samba] Core dumped - net ads dns gethostbzname
> 
> 
> Hi.
> 
> Performing a DNS search for a hostname results in a 
> segmentation fault:
> 
> 
> 
> 
> ## Debian 10 Buster 64bit
> 
> 
> 
> 
> root at hostxzy:~# net ads dns gethostbyname name $(hostname)
> Bad talloc magic value - unknown value
> PANIC (pid 15749): Bad talloc magic value - unknown value
> BACKTRACE: 12 stack frames:
> ?#0 
> /lib/x86_64-linux-gnu/libsamba-util.so.0(log_stack_trace+0x32)
>  [0x7f0827
> a408d2]
> ?#1 /lib/x86_64-linux-gnu/libsmbconf.so.0(smb_panic_s3+0x20) 
> [0x7f08278811c
> 0]
> ?#2 /lib/x86_64-linux-gnu/libsamba-util.so.0(smb_panic+0x2f) 
> [0x7f0827a409
> df]
> ?#3 /lib/x86_64-linux-gnu/libtalloc.so.2(+0x3591) [0x7f0826ceb591]
> ?#4 
> /usr/lib/x86_64-linux-gnu/samba/libaddns.so.0(dns_open_connect
> ion+0x174)
> [0x7f0827d20424]
> ?#5 net(do_gethostbyname+0x32) [0x5567e6e4acc2]
> ?#6 net(+0x38a50) [0x5567e6e11a50]
> ?#7 net(+0x36168) [0x5567e6e0f168]
> ?#8 net(net_ads+0x47) [0x5567e6e16f17]
> ?#9 net(main+0x980) [0x5567e6dfb5b0]
> ?#10 /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xeb) 
> [0x7f082686009
> b]
> ?#11 net(_start+0x2a) [0x5567e6dfb87a]
> Can not dump core: corepath not set up
> root at hostxzy:~# dpkg -l winbind
> Desired=Unknown/Install/Remove/Purge/Hold
> | 
> Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-a
> Wait/Trig-
> pend
> |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
> ||/ Name?????????? Version??????? Architecture Description
> +++-==============-==============-============-==============>
=============> =======================================> ii? winbind???????
2:4.9.5+dfsg-5 amd64??????? service to
> resolve user and 
> group information from Windows NT servers
> root at hostxzy:~#
> 
> 
> 
> 
> Please advise.
> 
> Thank you
> 
> Zbynek
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