[Dovecot] Auth service panic

[Piotr Rotter]

Hello,

I have dovecot director on one server and today I notice 146 times the
same problem. Log below. I try restart dovecot and mysql (auth-db
backend) but with no effect. Please help. If any other information is
needed I send it. My dovecot version is 2.1.15.

2014-03-26T16:15:28+01:00 r1 dovecot: auth: Fatal: master:
service(auth): child 9883 killed with signal 6 (core dumps disabled)
2014-03-26T16:15:43+01:00 r1 dovecot: auth: Panic: file
passdb-blocking.c: line 124 (passdb_blocking_lookup_credentials):
assertion failed: (auth_stream_is_empty(request->extra_fields) ||
request->master_user != NULL)
2014-03-26T16:15:43+01:00 r1 dovecot: auth: Error: Raw backtrace:
/usr/lib64/dovecot/libdovecot.so.0(+0x4469a) [0x7fdb06e1469a] ->
/usr/lib64/dovecot/libdovecot.so.0(+0x446de) [0x7fdb06e146de] ->
/usr/lib64/dovecot/libdovecot.so.0(+0x1c0ea) [0x7fdb06dec0ea] ->
dovecot/auth [34 wait, 1 passdb, 0
userdb](passdb_blocking_verify_plain+0) [0x41f593] -> dovecot/auth [34
wait, 1 passdb, 0 userdb](auth_request_lookup_credentials+0x104)
[0x413c41] -> dovecot/auth [34 wait, 1 passdb, 0 userdb]() [0x41c202] ->
dovecot/auth [34 wait, 1 passdb, 0 userdb]() [0x4139e6] -> dovecot/auth
[34 wait, 1 passdb, 0
userdb](auth_request_lookup_credentials_callback+0x6a) [0x413abb] ->
dovecot/auth [34 wait, 1 passdb, 0
userdb](passdb_handle_credentials+0x50) [0x41f389] -> dovecot/auth [34
wait, 1 passdb, 0 userdb]() [0x41f82e] -> dovecot/auth [34 wait, 1
passdb, 0 userdb]() [0x41798f] ->
/usr/lib64/dovecot/libdovecot.so.0(io_loop_call_io+0x27)
[0x7fdb06e1f68c] ->
/usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run+0x9e)
[0x7fdb06e204ee] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_run+0x27)
[0x7fdb06e1f645] ->
/usr/lib64/dovecot/libdovecot.so.0(master_service_run+0x13)
[0x7fdb06e0d348] -> dovecot/auth [34 wait, 1 passdb, 0
userdb](main+0x380) [0x41a396] ->
/lib64/libc.so.6(__libc_start_main+0xfd) [0x7fdb062ced2d] ->
dovecot/auth [34 wait, 1 passdb, 0 userdb]() [0x40ced9]
2014-03-26T16:15:43+01:00 r1 dovecot: auth: Fatal: master:
service(auth): child 18546 killed with signal 6 (core dumps disabled)