[Dovecot] Segmentation fault

Alex Domoradov alex.hha at gmail.com
Sat Feb 8 14:09:51 UTC 2014 

I have installed debug packages excluding sqlite and dovecot and tried
one more time

# echo "/var/core/%p" > /proc/sys/kernel/core_pattern
# doveconf -n
# 2.2.10: /etc/dovecot/dovecot.conf
# OS: Linux 2.6.32-431.3.1.el6.x86_64 x86_64 CentOS release 6.5 (Final)
Segmentation fault (core dumped)

# gdb /usr/bin/doveconf /var/core/23290
GNU gdb (GDB) Red Hat Enterprise Linux (7.2-60.el6_4.1)
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/bin/doveconf...(no debugging symbols found)...done.
[New Thread 23290]
Reading symbols from /usr/lib64/dovecot/libdovecot.so.0...done.
Loaded symbols for /usr/lib64/dovecot/libdovecot.so.0
Reading symbols from /lib64/libc-2.12.so...Reading symbols from
/usr/lib/debug/lib64/libc-2.12.so.debug...done.
done.
Loaded symbols for /lib64/libc-2.12.so
Reading symbols from /lib64/libdl-2.12.so...Reading symbols from
/usr/lib/debug/lib64/libdl-2.12.so.debug...done.
done.
Loaded symbols for /lib64/libdl-2.12.so
Reading symbols from /lib64/librt-2.12.so...Reading symbols from
/usr/lib/debug/lib64/librt-2.12.so.debug...done.
done.
Loaded symbols for /lib64/librt-2.12.so
Reading symbols from /lib64/ld-2.12.so...Reading symbols from
/usr/lib/debug/lib64/ld-2.12.so.debug...done.
done.
Loaded symbols for /lib64/ld-2.12.so
Reading symbols from /lib64/libpthread-2.12.so...Reading symbols from
/usr/lib/debug/lib64/libpthread-2.12.so.debug...done.
[Thread debugging using libthread_db enabled]
done.
Loaded symbols for /lib64/libpthread-2.12.so
Reading symbols from /lib64/libnss_files-2.12.so...Reading symbols
from /usr/lib/debug/lib64/libnss_files-2.12.so.debug...done.
done.
Loaded symbols for /lib64/libnss_files-2.12.so
Core was generated by `doveconf -n'.
Program terminated with signal 11, Segmentation fault.
#0  __strlen_sse2 () at ../sysdeps/x86_64/strlen.S:32
32              movdqu  (%rdi), %xmm1
Missing separate debuginfos, use: debuginfo-install dovecot-2.2.10-1.el6.x86_64
(gdb) bt full
#0  __strlen_sse2 () at ../sysdeps/x86_64/strlen.S:32
No locals.
#1  0x00007f139828e65d in p_strdup (pool=0x10afab0, str=0x288 <Address
0x288 out of bounds>) at strfuncs.c:41
        mem = <value optimized out>
        len = <value optimized out>
#2  0x000000000040528f in config_request_get_strings ()
No symbol table info available.
#3  0x000000000040c3ce in config_export_finish ()
No symbol table info available.
#4  0x00000000004054d4 in config_dump_human_output ()
No symbol table info available.
#5  0x0000000000405dff in config_dump_human ()
No symbol table info available.
#6  0x0000000000406bcf in main ()
No symbol table info available.

Is it possible to build debuginfo for the dovecot package?

On Sat, Feb 8, 2014 at 3:15 PM, Alex Domoradov <alex.hha at gmail.com> wrote:
> # gdb --args doveconf -n
> GNU gdb (GDB) Red Hat Enterprise Linux (7.2-60.el6_4.1)
> 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/bin/doveconf...(no debugging symbols found)...done.
> (gdb) run
> Starting program: /usr/bin/doveconf -n
> [Thread debugging using libthread_db enabled]
> # 2.2.10: /etc/dovecot/dovecot.conf
> # OS: Linux 2.6.32-431.3.1.el6.x86_64 x86_64 CentOS release 6.5 (Final)
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x00007ffff77f9451 in __strlen_sse2 () from /lib64/libc.so.6
> Missing separate debuginfos, use: debuginfo-install dovecot-2.2.10-1.el6.x86_64
> (gdb) bt full
> #0  0x00007ffff77f9451 in __strlen_sse2 () from /lib64/libc.so.6
> No symbol table info available.
> #1  0x00007ffff7b9665d in p_strdup (pool=0x6adac0, str=0x288 <Address
> 0x288 out of bounds>) at strfuncs.c:41
>         mem = <value optimized out>
>         len = <value optimized out>
> #2  0x000000000040528f in config_request_get_strings ()
> No symbol table info available.
> #3  0x000000000040c3ce in config_export_finish ()
> No symbol table info available.
> #4  0x00000000004054d4 in config_dump_human_output ()
> No symbol table info available.
> #5  0x0000000000405dff in config_dump_human ()
> No symbol table info available.
> #6  0x0000000000406bcf in main ()
> No symbol table info available.
>
> I have tried to install debug packages but without success
>
> # debuginfo-install dovecot-2.2.10-1.el6.x86_64
> Could not find debuginfo for main pkg: 1:dovecot-2.2.10-1.el6.x86_64
> Could not find debuginfo pkg for dependency package
> 1:dovecot-2.2.10-1.el6.x86_64
> Could not find debuginfo pkg for dependency package
> 1:dovecot-2.2.10-1.el6.x86_64
> Could not find debuginfo pkg for dependency package
> 1:dovecot-2.2.10-1.el6.x86_64
> Could not find debuginfo pkg for dependency package
> 1:dovecot-2.2.10-1.el6.x86_64
> Could not find debuginfo pkg for dependency package
> 1:dovecot-2.2.10-1.el6.x86_64
> Could not find debuginfo pkg for dependency package
> bzip2-libs-1.0.5-7.el6_0.x86_64
> Could not find debuginfo pkg for dependency package glibc-2.12-1.132.el6.x86_64
> Could not find debuginfo pkg for dependency package glibc-2.12-1.132.el6.x86_64
> Could not find debuginfo pkg for dependency package glibc-2.12-1.132.el6.x86_64
> Could not find debuginfo pkg for dependency package glibc-2.12-1.132.el6.x86_64
> Could not find debuginfo pkg for dependency package glibc-2.12-1.132.el6.x86_64
> Could not find debuginfo pkg for dependency package glibc-2.12-1.132.el6.x86_64
> Could not find debuginfo pkg for dependency package glibc-2.12-1.132.el6.x86_64
> Could not find debuginfo pkg for dependency package glibc-2.12-1.132.el6.x86_64
> Could not find debuginfo pkg for dependency package libcap-2.16-5.5.el6.x86_64
> Could not find debuginfo pkg for dependency package
> libcom_err-1.41.12-18.el6.x86_64
> Could not find debuginfo pkg for dependency package glibc-2.12-1.132.el6.x86_64
> Could not find debuginfo pkg for dependency package glibc-2.12-1.132.el6.x86_64
> Could not find debuginfo pkg for dependency package
> openssl-1.0.1e-16.el6_5.4.x86_64
> Could not find debuginfo pkg for dependency package
> openssl-1.0.1e-16.el6_5.4.x86_64
> Could not find debuginfo pkg for dependency package
> openssl-1.0.1e-16.el6_5.4.x86_64
> Could not find debuginfo pkg for dependency package glibc-2.12-1.132.el6.x86_64
> Could not find debuginfo pkg for dependency package glibc-2.12-1.132.el6.x86_64
> Could not find debuginfo pkg for dependency package
> 1:dovecot-2.2.10-1.el6.x86_64
> Could not find debuginfo pkg for dependency package
> 1:dovecot-2.2.10-1.el6.x86_64
> Could not find debuginfo pkg for dependency package
> 1:dovecot-2.2.10-1.el6.x86_64
> Could not find debuginfo pkg for dependency package
> 1:dovecot-2.2.10-1.el6.x86_64
> Could not find debuginfo pkg for dependency package
> 1:dovecot-2.2.10-1.el6.x86_64
> Could not find debuginfo pkg for dependency package
> 1:dovecot-2.2.10-1.el6.x86_64
> Could not find debuginfo pkg for dependency package
> 1:dovecot-2.2.10-1.el6.x86_64
> Could not find debuginfo pkg for dependency package
> 1:dovecot-2.2.10-1.el6.x86_64
> Could not find debuginfo pkg for dependency package expat-2.0.1-11.el6_2.x86_64
> Could not find debuginfo pkg for dependency package
> krb5-libs-1.10.3-10.el6_4.6.x86_64
> Could not find debuginfo pkg for dependency package
> krb5-libs-1.10.3-10.el6_4.6.x86_64
> Could not find debuginfo pkg for dependency package
> krb5-libs-1.10.3-10.el6_4.6.x86_64
> Could not find debuginfo pkg for dependency package
> krb5-libs-1.10.3-10.el6_4.6.x86_64
> Could not find debuginfo pkg for dependency package
> krb5-libs-1.10.3-10.el6_4.6.x86_64
> Could not find debuginfo pkg for dependency package
> openldap-2.4.23-34.el6_5.1.x86_64
> Could not find debuginfo pkg for dependency package pam-1.1.1-17.el6.x86_64
> Could not find debuginfo pkg for dependency package pam-1.1.1-17.el6.x86_64
> Could not find debuginfo pkg for dependency package glibc-2.12-1.132.el6.x86_64
> Could not find debuginfo pkg for dependency package glibc-2.12-1.132.el6.x86_64
> Could not find debuginfo pkg for dependency package sqlite-3.6.20-1.el6.x86_64
> Could not find debuginfo pkg for dependency package
> openssl-1.0.1e-16.el6_5.4.x86_64
> Could not find debuginfo pkg for dependency package
> openssl-1.0.1e-16.el6_5.4.x86_64
> Could not find debuginfo pkg for dependency package zlib-1.2.3-29.el6.x86_64
> No debuginfo packages available to install
>
> On Fri, Feb 7, 2014 at 11:44 PM, Reindl Harald <h.reindl at thelounge.net> wrote:
>> no - a typo in a config does not qualify a segfault at all
>>
>> Am 07.02.2014 22:42, schrieb Alex Domoradov:
>>> Sorry, it was my fault. With "plain" value all works fine.
>>>
>>> Thanks for the help
>>>
>>> On Fri, Feb 7, 2014 at 10:54 PM, Timo Sirainen <tss at iki.fi> wrote:
>>>> On 7.2.2014, at 15.22, Timo Sirainen <tss at iki.fi> wrote:
>>>>
>>>>>> auth_verbose_passwords = yes
>>>>>>
>>>>> I guess it's related to auth_verbose_passwords setting, but I can't immediately see why it would crash there.
>>>>
>>>> Oh, first I thought there were two settings related to this :) Anyway, the reason is simple: "yes" isn't a valid value here. Either use "plain" or "sha1". Although I suppose "yes" could be an alias for "plain" to make people's life easier. So:
>>>>
>>>> http://hg.dovecot.org/dovecot-2.2/rev/afd3cfcf1bcb
>>>> http://hg.dovecot.org/dovecot-2.2/rev/27ac53f11f1f
>>

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