dovecot - May 2017 - lmtp segfault after upgrade

I just upgraded our Director to 2.2.29.1 from 2.2.26, and now my dmesg 
and /var/log/messages are getting flooded by these errors:

lmtp[45758]: segfault at 21 ip 00007fb412d3ad11 sp 00007ffe83ad2df0 
error 4 in libdovecot.so.0.0.0[7fb412c95000+11c000]
lmtp[46304]: segfault at 91 ip 00007f771ba64d11 sp 00007ffe830635a0 
error 4 in libdovecot.so.0.0.0[7f771b9bf000+11c000]
lmtp[45775]: segfault at 21 ip 00007f206ed81d11 sp 00007ffd0f0daad0 
error 4 in libdovecot.so.0.0.0[7f206ecdc000+11c000]
lmtp[46649]: segfault at 21 ip 00007ff4aa027d11 sp 00007ffc05841430 
error 4 in libdovecot.so.0.0.0[7ff4a9f82000+11c000]
lmtp[45774]: segfault at 21 ip 00007ff1f3e0bd11 sp 00007ffe0ba00340 
error 4 in libdovecot.so.0.0.0[7ff1f3d66000+11c000]
lmtp[45776]: segfault at 411 ip 00007f96ded95d11 sp 00007ffce6401870 
error 4 in libdovecot.so.0.0.0[7f96decf0000+11c000]
lmtp[46896]: segfault at 21 ip 00007fbf1aa70d11 sp 00007ffc79e22bf0 
error 4 in libdovecot.so.0.0.0[7fbf1a9cb000+11c000]
lmtp[46695]: segfault at 21 ip 00007fd5ccad6d11 sp 00007ffe19e759d0 
error 4 in libdovecot.so.0.0.0[7fd5cca31000+11c000]
lmtp[45773]: segfault at 21 ip 00007f0eb7b65d11 sp 00007fff9d02e570 
error 4 in libdovecot.so.0.0.0[7f0eb7ac0000+11c000]
lmtp[47101]: segfault at 21 ip 00007fa95b052d11 sp 00007fff2d5485a0 
error 4 in libdovecot.so.0.0.0[7fa95afad000+11c000]
lmtp[45772]: segfault at 21 ip 00007f2f52b49d11 sp 00007fff99a4a6e0 
error 4 in libdovecot.so.0.0.0[7f2f52aa4000+11c000]
lmtp[46595]: segfault at 21 ip 00007f0ccbdbad11 sp 00007ffd17bfe9e0 
error 4 in libdovecot.so.0.0.0[7f0ccbd15000+11c000]
lmtp[45770]: segfault at 21 ip 00007f94a576ed11 sp 00007ffc29c2ff00 
error 4 in libdovecot.so.0.0.0[7f94a56c9000+11c000]
lmtp[45769]: segfault at 21 ip 00007f34999b5d11 sp 00007ffe28818350 
error 4 in libdovecot.so.0.0.0[7f3499910000+11c000]
lmtp[47371]: segfault at 21 ip 00007f13c611fd11 sp 00007ffcdb000b10 
error 4 in libdovecot.so.0.0.0[7f13c607a000+11c000]
lmtp[47419]: segfault at 21 ip 00007f4010ff2d11 sp 00007ffd97519420 
error 4 in libdovecot.so.0.0.0[7f4010f4d000+11c000]
lmtp[47511]: segfault at 581 ip 00007fd5e3d21d11 sp 00007ffce61f29c0 
error 4 in libdovecot.so.0.0.0[7fd5e3c7c000+11c000]
lmtp[47277]: segfault at 21 ip 00007f04c3d6cd11 sp 00007ffc421da1b0 
error 4 in libdovecot.so.0.0.0[7f04c3cc7000+11c000]
lmtp[45771]: segfault at 21 ip 00007f55c690ed11 sp 00007fff35521fc0 
error 4 in libdovecot.so.0.0.0[7f55c6869000+11c000]
lmtp[47543]: segfault at 21 ip 00007f11ea946d11 sp 00007ffdd9a97690 
error 4 in libdovecot.so.0.0.0[7f11ea8a1000+11c000]
lmtp[47669]: segfault at 21 ip 00007f8f58abbd11 sp 00007ffdd5573220 
error 4 in libdovecot.so.0.0.0[7f8f58a16000+11c000]
lmtp[46959]: segfault at 41 ip 00007ff9d6f3ed11 sp 00007ffe28dc8ea0 
error 4 in libdovecot.so.0.0.0[7ff9d6e99000+11c000]

Any ideas?

-- 
Tom

> On May 1, 2017 at 8:21 PM Tom Sommer <mail at tomsommer.dk> wrote:
> 
> 
> I just upgraded our Director to 2.2.29.1 from 2.2.26, and now my dmesg 
> and /var/log/messages are getting flooded by these errors:
> 
> lmtp[45758]: segfault at 21 ip 00007fb412d3ad11 sp 00007ffe83ad2df0 
> error 4 in libdovecot.so.0.0.0[7fb412c95000+11c000]
> 
> Any ideas?
> 
> -- 
> Tom
Try get a core dump and run it thru gdb.

Aki

> On May 1, 2017 at 8:26 PM Aki Tuomi <aki.tuomi at dovecot.fi> wrote:
> 
> 
> 
> > On May 1, 2017 at 8:21 PM Tom Sommer <mail at tomsommer.dk>
wrote:
> > 
> > 
> > I just upgraded our Director to 2.2.29.1 from 2.2.26, and now my dmesg
> > and /var/log/messages are getting flooded by these errors:
> > 
> > lmtp[45758]: segfault at 21 ip 00007fb412d3ad11 sp 00007ffe83ad2df0 
> > error 4 in libdovecot.so.0.0.0[7fb412c95000+11c000]
> > 
> > Any ideas?
> > 
> > -- 
> > Tom
> 
> Try get a core dump and run it thru gdb.
> 
> Aki
Also, dovecot should log some kind of trace and message into syslog or whatever
log_path points to.

Aki

On 2017-05-01 19:26, Aki Tuomi wrote:
>> On May 1, 2017 at 8:21 PM Tom Sommer <mail at tomsommer.dk>
wrote:
>> 
>> 
>> I just upgraded our Director to 2.2.29.1 from 2.2.26, and now my dmesg
>> and /var/log/messages are getting flooded by these errors:
>> 
>> lmtp[45758]: segfault at 21 ip 00007fb412d3ad11 sp 00007ffe83ad2df0
>> error 4 in libdovecot.so.0.0.0[7fb412c95000+11c000]
>> 
>> Any ideas?
>> 
>> --
>> Tom
> 
> Try get a core dump and run it thru gdb.

[root at director1 dovecot]# gdb /usr/libexec/dovecot/lmtp core.19749
GNU gdb (GDB) Red Hat Enterprise Linux (7.2-92.el6)
Copyright (C) 2010 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-redhat-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/libexec/dovecot/lmtp...done.
[New Thread 19749]
Reading symbols from /usr/lib/dovecot/libdovecot-lda.so.0...done.
Loaded symbols for /usr/lib/dovecot/libdovecot-lda.so.0
Reading symbols from /usr/lib/dovecot/libdovecot-storage.so.0...done.
Loaded symbols for /usr/lib/dovecot/libdovecot-storage.so.0
Reading symbols from /usr/lib/dovecot/libdovecot.so.0...done.
Loaded symbols for /usr/lib/dovecot/libdovecot.so.0
Reading symbols from /lib64/libc.so.6...(no debugging symbols 
found)...done.
Loaded symbols for /lib64/libc.so.6
Reading symbols from /lib64/librt.so.1...(no debugging symbols 
found)...done.
Loaded symbols for /lib64/librt.so.1
Reading symbols from /lib64/libdl.so.2...(no debugging symbols 
found)...done.
Loaded symbols for /lib64/libdl.so.2
Reading symbols from /lib64/ld-linux-x86-64.so.2...(no debugging symbols 
found)...done.
Loaded symbols for /lib64/ld-linux-x86-64.so.2
Reading symbols from /lib64/libpthread.so.0...(no debugging symbols 
found)...done.
[Thread debugging using libthread_db enabled]
Loaded symbols for /lib64/libpthread.so.0
Reading symbols from /usr/lib/dovecot/libssl_iostream_openssl.so...done.
Loaded symbols for /usr/lib/dovecot/libssl_iostream_openssl.so
Reading symbols from /usr/lib64/libssl.so.10...(no debugging symbols 
found)...done.
Loaded symbols for /usr/lib64/libssl.so.10
Reading symbols from /usr/lib64/libcrypto.so.10...(no debugging symbols 
found)...done.
Loaded symbols for /usr/lib64/libcrypto.so.10
Reading symbols from /lib64/libgssapi_krb5.so.2...(no debugging symbols 
found)...done.
Loaded symbols for /lib64/libgssapi_krb5.so.2
Reading symbols from /lib64/libkrb5.so.3...(no debugging symbols 
found)...done.
Loaded symbols for /lib64/libkrb5.so.3
Reading symbols from /lib64/libcom_err.so.2...(no debugging symbols 
found)...done.
Loaded symbols for /lib64/libcom_err.so.2
Reading symbols from /lib64/libk5crypto.so.3...(no debugging symbols 
found)...done.
Loaded symbols for /lib64/libk5crypto.so.3
Reading symbols from /lib64/libz.so.1...(no debugging symbols 
found)...done.
Loaded symbols for /lib64/libz.so.1
Reading symbols from /lib64/libkrb5support.so.0...(no debugging symbols 
found)...done.
Loaded symbols for /lib64/libkrb5support.so.0
Reading symbols from /lib64/libkeyutils.so.1...(no debugging symbols 
found)...done.
Loaded symbols for /lib64/libkeyutils.so.1
Reading symbols from /lib64/libresolv.so.2...(no debugging symbols 
found)...done.
Loaded symbols for /lib64/libresolv.so.2
Reading symbols from /lib64/libselinux.so.1...(no debugging symbols 
found)...done.
Loaded symbols for /lib64/libselinux.so.1
Core was generated by `dovecot/lmtp'.
Program terminated with signal 11, Segmentation fault.
#0  i_stream_seek (stream=0x21, v_offset=0) at istream.c:298
298             if (v_offset >= stream->v_offset &&
Missing separate debuginfos, use: debuginfo-install 
glibc-2.12-1.209.el6_9.1.x86_64 keyutils-libs-1.4-5.el6.x86_64 
krb5-libs-1.10.3-65.el6.x86_64 libcom_err-1.41.12-23.el6.x86_64 
libselinux-2.0.94-7.el6.x86_64 openssl-1.0.1e-57.el6.x86_64 
zlib-1.2.3-29.el6.x86_64