I am experiencing problems ProFTPD 1.2.10 on Debian (testing).
Upon login attempts the daemon sometimes (not always but very often) exits
with signal 11 and my FTP client throws a "Control connection closed."
error.
If you need any further pieces of information, please just let me know. Any
suggestions and ideas are welcome and very much appreciated.

--------------------------------------------------------
SERVERNAME:~# proftpd -td5
Checking syntax of configuration file
- mod_tls/2.0.7: using OpenSSL 0.9.7e 25 Oct 2004
- parsing '/etc/proftpd.conf' configuration SERVERNAME - SERVERNAME -
Config for SERVERNAME.DOMAIN.TLD:
SERVERNAME - Limit
SERVERNAME - DenyGroup
SERVERNAME - DefaultServer
SERVERNAME - ServerIdent
SERVERNAME - ListOptions
SERVERNAME - TimesGMT
SERVERNAME - Umask
SERVERNAME - UserID
SERVERNAME - UserName
SERVERNAME - GroupID
SERVERNAME - GroupName
SERVERNAME - TransferLog
SERVERNAME - AllowOverwrite
SERVERNAME - DefaultRoot
Syntax check complete.
--------------------------------------------------------


And some debug output (-d 9) of a session that triggered the segfault:


May 20 13:43:34 SERVERNAME proftpd[23248]: SERVERNAME - scrubbing scoreboard

May 20 13:43:34 SERVERNAME proftpd[23248]: SERVERNAME - ROOT PRIVS at
.../../../modules/mod_core.c:130
May 20 13:43:34 SERVERNAME proftpd[23248]: SERVERNAME - RELINQUISH PRIVS at
.../../../modules/mod_core.c:132
May 20 13:43:34 SERVERNAME proftpd[23248]: SERVERNAME - ROOT PRIVS at
.../../../modules/mod_core.c:160
May 20 13:43:34 SERVERNAME proftpd[23248]: SERVERNAME - RELINQUISH PRIVS at
.../../../modules/mod_core.c:189
May 20 13:43:34 SERVERNAME proftpd[23248]: SERVERNAME - FS: using system
lstat()
May 20 13:43:34 SERVERNAME proftpd[23248]: SERVERNAME - FS: using system
lstat()
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME - ROOT PRIVS at
.../../../src/main.c:1162
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME - RELINQUISH PRIVS at
.../../../src/main.c:1166
May 20 13:43:34 SERVERNAME proftpd[23248]: SERVERNAME - FS: using system
lstat()
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) - ROOT
PRIVS at ../../../src/main.c:1011
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
SETUP PRIVS at ../../../src/main.c:1016
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) - FTP
session requested from unknown class
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
performing module session initializations
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
mod_delay/0.4: opening DelayTable '/var/run/proftpd/proftpd.delay'
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) - ROOT
PRIVS at ../../../modules/mod_delay.c:761
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) - FS:
using system open()
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
RELINQUISH PRIVS at ../../../modules/mod_delay.c:763
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) - ROOT
PRIVS at ../../../modules/mod_auth.c:132
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
opening scoreboard '/var/run/proftpd/proftpd.scoreboard'
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
RELINQUISH PRIVS at ../../../modules/mod_auth.c:134
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
performing ident lookup
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
ident connection failed: Connection refused
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
ident lookup returned 'UNKNOWN'
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
connected - local : 213.203.208.142:21
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
connected - remote : 81.173.152.179:4313
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) - FTP
session opened.
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching PRE_CMD command 'USER FTPUSER' to mod_rewrite
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching PRE_CMD command 'USER FTPUSER' to mod_tls
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching PRE_CMD command 'USER FTPUSER' to mod_core
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching PRE_CMD command 'USER FTPUSER' to mod_core
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching PRE_CMD command 'USER FTPUSER' to mod_delay
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching PRE_CMD command 'USER FTPUSER' to mod_auth
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching auth request "endpwent" to module mod_radius
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching auth request "endpwent" to module mod_auth_file
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching auth request "endpwent" to module mod_auth_unix
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching auth request "endgrent" to module mod_radius
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching auth request "endgrent" to module mod_auth_file
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching auth request "endgrent" to module mod_auth_unix
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching CMD command 'USER FTPUSER' to mod_ratio
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching CMD command 'USER FTPUSER' to mod_auth
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching auth request "getgroups" to module mod_radius
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching auth request "getgroups" to module mod_auth_file
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching auth request "getgroups" to module mod_auth_unix
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching POST_CMD command 'USER FTPUSER' to mod_delay
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
mod_delay/0.4: selecting median interval from 256 values
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching LOG_CMD command 'USER FTPUSER' to mod_log
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching PRE_CMD command 'PASS (hidden)' to mod_rewrite
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching PRE_CMD command 'PASS (hidden)' to mod_tls
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching PRE_CMD command 'PASS (hidden)' to mod_core
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching PRE_CMD command 'PASS (hidden)' to mod_core
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching PRE_CMD command 'PASS (hidden)' to mod_delay
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching PRE_CMD command 'PASS (hidden)' to mod_wrap
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching PRE_CMD command 'PASS (hidden)' to mod_radius
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching PRE_CMD command 'PASS (hidden)' to mod_auth
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching auth request "endpwent" to module mod_radius
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching auth request "endpwent" to module mod_auth_file
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching auth request "endpwent" to module mod_auth_unix
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching auth request "endgrent" to module mod_radius
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching auth request "endgrent" to module mod_auth_file
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching auth request "endgrent" to module mod_auth_unix
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching CMD command 'PASS (hidden)' to mod_auth
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching auth request "getgroups" to module mod_radius
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching auth request "getgroups" to module mod_auth_file
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching auth request "getgroups" to module mod_auth_unix
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching auth request "getpwnam" to module mod_radius
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching auth request "getpwnam" to module mod_auth_file
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching auth request "getpwnam" to module mod_auth_unix
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching auth request "gid_name" to module mod_radius
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching auth request "gid_name" to module mod_auth_file
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching auth request "gid_name" to module mod_auth_unix
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching auth request "auth" to module mod_radius
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching auth request "auth" to module mod_tls
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
dispatching auth request "auth" to module mod_auth_pam
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) - ROOT
PRIVS at ../../../modules/mod_auth_pam.c:258
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) -
ProFTPD terminating (signal 11)
May 20 13:43:34 SERVERNAME proftpd[24029]: SERVERNAME (USER@PROVIDER) - FTP
session closed.







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