Bug#839880: proftpd-basic: proftpd server instance crashed with signal 11

[Hilmar Preuße]

Am 23.12.2017 um 16:58 teilte Олег Мороз mit:

Hi,

did you set the limits in correct user context (see 
/etc/security/limits.conf)? No sorry, I'm not an expert in this.

Regarding the crash: I do see the sig 11 below. Did you try to hit 
CTRL-C (as described) and generate a backtrace then?

Thanks!

Hilmar

> coredump did not generated. Have tried to use:
> 
> |ulimit -c unlimited|
> 
> with no effects (have checked / and  /root directories to find coredump)
> 
> Then have installed proftpd debug symbols and gdb and start proftpd 
> debugging
> 
> 
> root at sim-ng-data /run # gdb proftpd
> GNU gdb (Debian 7.12-6+b1) 7.12.0.20161007-git
> Copyright (C) 2016 Free Software Foundation, Inc.
> License GPLv3+: GNU GPL version 3 or later 
> <http://gnu.org/licenses/gpl.html>
> This is free software: you are free to change and redistribute it.
> There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
> and "show warranty" for details.
> This GDB was configured as "x86_64-linux-gnu".
> Type "show configuration" for configuration details.
> For bug reporting instructions, please see:
> <http://www.gnu.org/software/gdb/bugs/>.
> Find the GDB manual and other documentation resources online at:
> <http://www.gnu.org/software/gdb/documentation/>.
> For help, type "help".
> Type "apropos word" to search for commands related to "word"...
> Reading symbols from proftpd...Reading symbols from 
> /usr/lib/debug/.build-id/c9/5250b18658db39aa4692b37f01f3549f2181a5.debug...done. 
> 
> done.
> 
> (gdb) run -n
> Starting program: /usr/sbin/proftpd -n
> [Thread debugging using libthread_db enabled]
> Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
> 2017-12-23 18:56:12,032 sim-ng-data proftpd[11874]: processing 
> configuration directory '/etc/proftpd/conf.d/'
> 2017-12-23 18:56:12,041 sim-ng-data proftpd[11874] sim-ng-data: ProFTPD 
> 1.3.5e (maint) (built Di Dez 19 2017 07:53:15 CET) standalone mode STARTUP
> 2017-12-23 18:56:17,915 sim-ng-data proftpd[11912] sim-ng-data 
> (OpenWrt[192.168.3.180]): SSH2 session opened.
> 2017-12-23 15:56:18,046 sim-ng-data proftpd[11912] sim-ng-data 
> (OpenWrt[192.168.3.180]): USER ftp: Login successful
> 2017-12-23 15:56:18,046 sim-ng-data proftpd[11912] sim-ng-data 
> (OpenWrt[192.168.3.180]): ProFTPD terminating (signal 11)
> 2017-12-23 15:56:18,046 sim-ng-data proftpd[11912] sim-ng-data 
> (OpenWrt[192.168.3.180]): ProFTPD terminating (signal 11)
> 2017-12-23 15:56:18,046 sim-ng-data proftpd[11912] sim-ng-data 
> (OpenWrt[192.168.3.180]): SSH2 session closed.
> 
> 
> program is not crushed (still working and running) because of that i 
> have no posibility to collect backtrace of error
> 
> 
> 
> 23.12.2017 17:53, Hilmar Preuße пишет:
>> On 23.12.2017 11:25, Олег Мороз wrote:
>>
>> Hi Олег,
>>
>>> 2017-12-23 13:24:15,773 sim-ng-data proftpd[25418] sim-ng-data: ProFTPD
>>> 1.3.5e (maint) (built Di Dez 19 2017 07:53:15 CET) standalone mode 
>>> STARTUP
>>> 2017-12-23 13:24:19,256 sim-ng-data proftpd[25446] sim-ng-data
>>> (OpenWrt[192.168.3.180]): SSH2 session opened.
>>> 2017-12-23 10:24:19,381 sim-ng-data proftpd[25446] sim-ng-data
>>> (OpenWrt[192.168.3.180]): USER ftp: Login successful
>>> 2017-12-23 10:24:19,381 sim-ng-data proftpd[25446] sim-ng-data
>>> (OpenWrt[192.168.3.180]): ProFTPD terminating (signal 11)
>>> 2017-12-23 10:24:19,381 sim-ng-data proftpd[25446] sim-ng-data
>>> (OpenWrt[192.168.3.180]): SSH2 session closed.
>>>
>> Is a core dump generated for the crash? If not, don't care for now.
>>
>> The URL [1] describes some basic steps how to generated a back trace for
>> debugging. Please follow them as far as possible, in case of questions
>> please call back. The section "Installing the debugging symbols" won't
>> work as described; our debug symbols are not in archive yet. However
>> I've uploaded the appropriate dbgsym packages to the location where you
>> got the proftpd package, please install them from there.
>>
>> Hilmar
>>
>> [1] https://wiki.debian.org/HowToGetABacktrace
> 


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