dovecot - Apr 2017 - abrt reported "imap killed by SIGBUS"

Hi sbr-services,

Could you give me some idea?

### abrt reported the error as below.
[root at cupop4 log]# abrt-cli list --since 1488267244 id
ad716dbfd3a68bbe0f055e32ebfe562f4f75df43
reason:         imap killed by SIGBUS
time:           Sun Mar 19  2017 10:58:27 AM JST
cmdline:        dovecot/imap
package:        dovecot-2.2.10-7.el7
uid:            80180 (acaa2325)
count:          2
Directory:      /var/spool/abrt/ccpp-2017-03-19-10:58:27-4904
'abrt-cli report ?????/var/spool/abrt/ccpp-2017-03-19-10:58:27-4904'


### /var/log/messages
Mar 19 10:58:27 cupop4 abrt-hook-ccpp: Process 4904 (imap) of user 80180
killed by SIGBUS - dumping core

And, there are lots of ldap error in /var/log/messages. Dovecot uses the
ldap as userdb and passwddb.
Is the ldap error related to imap crash?

Mar 19 10:58:21 cupop4 nslcd[1534]: [a378de]
<group/member="postfix">
ldap_result() failed: Invalid DN syntax: Invalid DN

### /var/log/dovecot

Mar 19 10:58:27 cupop4 dovecot: imap(acaa2325): Fatal: master:
service(imap): child 4904 killed with signal 7 (core dumped)


### gdb

Core was generated by `dovecot/imap'.
Program terminated with signal 7, Bus error.
#0  0x00007fc4a69f293e in mail_cache_lookup_offset (cache=0x7fc4a811a320,
view=<optimized out>, seq=<optimized out>, offset_r=offset_r at
entry
=0x7ffe23a98900)
    at mail-cache-lookup.c:95
95 while (cache->hdr->file_seq != reset_id) {
(gdb) bt
#0  0x00007fc4a69f293e in mail_cache_lookup_offset (cache=0x7fc4a811a320,
view=<optimized out>, seq=<optimized out>, offset_r=offset_r at
entry
=0x7ffe23a98900)
    at mail-cache-lookup.c:95
#1  0x00007fc4a69f2afa in mail_cache_lookup_iter_init
(view=view at entry=0x7fc4a81332b0,
seq=<optimized out>, ctx_r=ctx_r at entry=0x7ffe23a988e0)
    at mail-cache-lookup.c:154
#2  0x00007fc4a69f2f8f in mail_cache_seq (seq=<optimized out>,
view=0x7fc4a81332b0) at mail-cache-lookup.c:322
#3  mail_cache_field_exists (view=view at entry=0x7fc4a81332b0, seq=seq at
entry=760,
field=field at entry=4) at mail-cache-lookup.c:352
#4  0x00007fc4a69f3151 in mail_cache_lookup_field (view=0x7fc4a81332b0,
dest_buf=dest_buf at entry=0x7ffe23a98a00, seq=760, field_idx=field_idx at entry
=4)
    at mail-cache-lookup.c:413
#5  0x00007fc4a69d9439 in index_mail_cache_lookup_field
(mail=mail at entry=0x7fc4a8128cd0,
buf=buf at entry=0x7ffe23a98a00, field_idx=field_idx at entry=4)
    at index-mail.c:68
#6  0x00007fc4a69d94a7 in index_mail_get_fixed_field (mail=0x7fc4a8128cd0,
field=<optimized out>, data=<optimized out>, data_size=8) at
index-mail.c:130
#7  0x00007fc4a69d9fed in index_mail_get_cached_virtual_size
(mail=mail at entry=0x7fc4a8128cd0, size_r=size_r at entry=0x7ffe23a98b20) at
index-mail.c:403
#8  0x00007fc4a6987c1b in maildir_mail_get_virtual_size
(_mail=0x7fc4a8128cd0, size_r=0x7ffe23a98b20) at maildir-mail.c:388
#9  0x00007fc4a69d9719 in index_mail_update_access_parts
(mail=mail at entry=0x7fc4a8128cd0)
at index-mail.c:1490
#10 0x00007fc4a69dbb93 in index_mail_set_seq (_mail=0x7fc4a8128cd0,
seq=760, saving=<optimized out>) at index-mail.c:1521
#11 0x00007fc4a69e28cb in search_more_with_mail (mail=0x7fc4a8128cd0,
ctx=0x7fc4a8132730) at index-search.c:1507
#12 search_more_with_prefetching (mail_r=<optimized out>,
ctx=<optimized
out>) at index-search.c:1579
#13 search_more (ctx=ctx at entry=0x7fc4a8132730,
mail_r=mail_r at entry=0x7ffe23a98c20)
at index-search.c:1650
#14 0x00007fc4a69e2ff4 in index_storage_search_next_nonblock
(_ctx=0x7fc4a8132730, mail_r=0x7fc4a81120d8, tryagain_r=0x7ffe23a98c87) at
index-search.c:1674
#15 0x00007fc4a69bc4ef in mailbox_search_next_nonblock
(ctx=ctx at entry=0x7fc4a8132730,
mail_r=mail_r at entry=0x7fc4a81120d8,
    tryagain_r=tryagain_r at entry=0x7ffe23a98c87) at mail-storage.c:1787
#16 0x00007fc4a69bc55d in mailbox_search_next (ctx=0x7fc4a8132730,
mail_r=mail_r at entry=0x7fc4a81120d8) at mail-storage.c:1773
#17 0x00007fc4a6e97874 in imap_fetch_more_int (ctx=ctx at entry=0x7fc4a8112078,
cancel=false) at imap-fetch.c:479
#18 0x00007fc4a6e98852 in imap_fetch_more (ctx=0x7fc4a8112078,
cmd=cmd at entry=0x7fc4a8111ed0)
at imap-fetch.c:556
#19 0x00007fc4a6e8c17d in cmd_fetch (cmd=0x7fc4a8111ed0) at cmd-fetch.c:284
#20 0x00007fc4a6e9601c in command_exec (cmd=cmd at entry=0x7fc4a8111ed0) at
imap-commands.c:158
#21 0x00007fc4a6e94f1f in client_command_input (cmd=cmd at entry=0x7fc4a8111ed0)
at imap-client.c:780
#22 0x00007fc4a6e95005 in client_command_input (cmd=0x7fc4a8111ed0) at
imap-client.c:841
#23 0x00007fc4a6e952fd in client_handle_next_command
(remove_io_r=<synthetic pointer>, client=0x7fc4a8111530) at
imap-client.c:879
#24 client_handle_input (client=client at entry=0x7fc4a8111530) at
imap-client.c:891
#25 0x00007fc4a6e956c5 in client_input (client=0x7fc4a8111530) at
imap-client.c:933
#26 0x00007fc4a66e1a87 in io_loop_call_io (io=0x7fc4a811edd0) at
ioloop.c:388
#27 0x00007fc4a66e290f in io_loop_handler_run
(ioloop=ioloop at entry=0x7fc4a80fc750)
at ioloop-epoll.c:220
#28 0x00007fc4a66e15d8 in io_loop_run (ioloop=0x7fc4a80fc750) at
ioloop.c:412
#29 0x00007fc4a668e9e3 in master_service_run (service=0x7fc4a80fc5e0,
callback=callback at entry=0x7fc4a6e9ed70 <client_connected>) at
master-service.c:571
#30 0x00007fc4a6e89324 in main (argc=1, argv=0x7fc4a80fc390) at main.c:400

Thank you.

Best regards,
Hongying Liu

Hi!

Responses in middle.

Aki

On 06.04.2017 06:05, Hongying Liu wrote:
> Hi sbr-services,
>
> Could you give me some idea?
>
> ### abrt reported the error as below.
> [root at cupop4 log]# abrt-cli list --since 1488267244 id
> ad716dbfd3a68bbe0f055e32ebfe562f4f75df43
> reason:         imap killed by SIGBUS
> time:           Sun Mar 19  2017 10:58:27 AM JST
> cmdline:        dovecot/imap
> package:        dovecot-2.2.10-7.el7
> uid:            80180 (acaa2325)
> count:          2
> Directory:      /var/spool/abrt/ccpp-2017-03-19-10:58:27-4904
> 'abrt-cli report
?????/var/spool/abrt/ccpp-2017-03-19-10:58:27-4904'
>
>
> ### /var/log/messages
> Mar 19 10:58:27 cupop4 abrt-hook-ccpp: Process 4904 (imap) of user 80180
> killed by SIGBUS - dumping core
>
> And, there are lots of ldap error in /var/log/messages. Dovecot uses the
> ldap as userdb and passwddb.
> Is the ldap error related to imap crash?
>
> Mar 19 10:58:21 cupop4 nslcd[1534]: [a378de]
<group/member="postfix">
> ldap_result() failed: Invalid DN syntax: Invalid DN
This looks like an invalid DN syntax.
>
> ### /var/log/dovecot
>
> Mar 19 10:58:27 cupop4 dovecot: imap(acaa2325): Fatal: master:
> service(imap): child 4904 killed with signal 7 (core dumped)
>
Can you do p cache, p cache->hdr, p cache->hdr->file_seq and p reset_id
> ### gdb
>
> Core was generated by `dovecot/imap'.
> Program terminated with signal 7, Bus error.
> #0  0x00007fc4a69f293e in mail_cache_lookup_offset (cache=0x7fc4a811a320,
> view=<optimized out>, seq=<optimized out>, offset_r=offset_r at
entry
> =0x7ffe23a98900)
>     at mail-cache-lookup.c:95
> 95 while (cache->hdr->file_seq != reset_id) {
> (gdb) bt
> #0  0x00007fc4a69f293e in mail_cache_lookup_offset (cache=0x7fc4a811a320,
> view=<optimized out>, seq=<optimized out>, offset_r=offset_r at
entry
> =0x7ffe23a98900)
>     at mail-cache-lookup.c:95
> #1  0x00007fc4a69f2afa in mail_cache_lookup_iter_init
> (view=view at entry=0x7fc4a81332b0,
> seq=<optimized out>, ctx_r=ctx_r at entry=0x7ffe23a988e0)
>     at mail-cache-lookup.c:154
> #2  0x00007fc4a69f2f8f in mail_cache_seq (seq=<optimized out>,
> view=0x7fc4a81332b0) at mail-cache-lookup.c:322
> #3  mail_cache_field_exists (view=view at entry=0x7fc4a81332b0, seq=seq at
entry=760,
> field=field at entry=4) at mail-cache-lookup.c:352
> #4  0x00007fc4a69f3151 in mail_cache_lookup_field (view=0x7fc4a81332b0,
> dest_buf=dest_buf at entry=0x7ffe23a98a00, seq=760, field_idx=field_idx at
entry
> =4)
>     at mail-cache-lookup.c:413
> #5  0x00007fc4a69d9439 in index_mail_cache_lookup_field
> (mail=mail at entry=0x7fc4a8128cd0,
> buf=buf at entry=0x7ffe23a98a00, field_idx=field_idx at entry=4)
>     at index-mail.c:68
> #6  0x00007fc4a69d94a7 in index_mail_get_fixed_field (mail=0x7fc4a8128cd0,
> field=<optimized out>, data=<optimized out>, data_size=8) at
> index-mail.c:130
> #7  0x00007fc4a69d9fed in index_mail_get_cached_virtual_size
> (mail=mail at entry=0x7fc4a8128cd0, size_r=size_r at entry=0x7ffe23a98b20)
at
> index-mail.c:403
> #8  0x00007fc4a6987c1b in maildir_mail_get_virtual_size
> (_mail=0x7fc4a8128cd0, size_r=0x7ffe23a98b20) at maildir-mail.c:388
> #9  0x00007fc4a69d9719 in index_mail_update_access_parts
> (mail=mail at entry=0x7fc4a8128cd0)
> at index-mail.c:1490
> #10 0x00007fc4a69dbb93 in index_mail_set_seq (_mail=0x7fc4a8128cd0,
> seq=760, saving=<optimized out>) at index-mail.c:1521
> #11 0x00007fc4a69e28cb in search_more_with_mail (mail=0x7fc4a8128cd0,
> ctx=0x7fc4a8132730) at index-search.c:1507
> #12 search_more_with_prefetching (mail_r=<optimized out>,
ctx=<optimized
> out>) at index-search.c:1579
> #13 search_more (ctx=ctx at entry=0x7fc4a8132730,
> mail_r=mail_r at entry=0x7ffe23a98c20)
> at index-search.c:1650
> #14 0x00007fc4a69e2ff4 in index_storage_search_next_nonblock
> (_ctx=0x7fc4a8132730, mail_r=0x7fc4a81120d8, tryagain_r=0x7ffe23a98c87) at
> index-search.c:1674
> #15 0x00007fc4a69bc4ef in mailbox_search_next_nonblock
> (ctx=ctx at entry=0x7fc4a8132730,
> mail_r=mail_r at entry=0x7fc4a81120d8,
>     tryagain_r=tryagain_r at entry=0x7ffe23a98c87) at mail-storage.c:1787
> #16 0x00007fc4a69bc55d in mailbox_search_next (ctx=0x7fc4a8132730,
> mail_r=mail_r at entry=0x7fc4a81120d8) at mail-storage.c:1773
> #17 0x00007fc4a6e97874 in imap_fetch_more_int (ctx=ctx at
entry=0x7fc4a8112078,
> cancel=false) at imap-fetch.c:479
> #18 0x00007fc4a6e98852 in imap_fetch_more (ctx=0x7fc4a8112078,
> cmd=cmd at entry=0x7fc4a8111ed0)
> at imap-fetch.c:556
> #19 0x00007fc4a6e8c17d in cmd_fetch (cmd=0x7fc4a8111ed0) at cmd-fetch.c:284
> #20 0x00007fc4a6e9601c in command_exec (cmd=cmd at entry=0x7fc4a8111ed0) at
> imap-commands.c:158
> #21 0x00007fc4a6e94f1f in client_command_input (cmd=cmd at
entry=0x7fc4a8111ed0)
> at imap-client.c:780
> #22 0x00007fc4a6e95005 in client_command_input (cmd=0x7fc4a8111ed0) at
> imap-client.c:841
> #23 0x00007fc4a6e952fd in client_handle_next_command
> (remove_io_r=<synthetic pointer>, client=0x7fc4a8111530) at
> imap-client.c:879
> #24 client_handle_input (client=client at entry=0x7fc4a8111530) at
> imap-client.c:891
> #25 0x00007fc4a6e956c5 in client_input (client=0x7fc4a8111530) at
> imap-client.c:933
> #26 0x00007fc4a66e1a87 in io_loop_call_io (io=0x7fc4a811edd0) at
> ioloop.c:388
> #27 0x00007fc4a66e290f in io_loop_handler_run
> (ioloop=ioloop at entry=0x7fc4a80fc750)
> at ioloop-epoll.c:220
> #28 0x00007fc4a66e15d8 in io_loop_run (ioloop=0x7fc4a80fc750) at
> ioloop.c:412
> #29 0x00007fc4a668e9e3 in master_service_run (service=0x7fc4a80fc5e0,
> callback=callback at entry=0x7fc4a6e9ed70 <client_connected>) at
> master-service.c:571
> #30 0x00007fc4a6e89324 in main (argc=1, argv=0x7fc4a80fc390) at main.c:400
>
> Thank you.
>
> Best regards,
> Hongying Liu

Please keep responses on list.

Can you please run valgrind on this, as it appears to be some sort of memory
corruption issue.

Aki
> On April 7, 2017 at 5:37 AM Hongying Liu <hongyliu at redhat.com>
wrote:
> 
> 
> Thanks for your response.
> 
> (gdb) p cache
> $1 = (struct mail_cache *) 0x7fc4a811a320
> (gdb) p cache->hdr
> $2 = (const struct mail_cache_header *) 0x7fc4a6ddb000
> (gdb) p cache->hdr->file_seq
> Cannot access memory at address 0x7fc4a6ddb008   <----
> (gdb) p reset_id
> $3 = 1488892251
> 
> 
> 2017-04-06 19:34 GMT+08:00 Aki Tuomi <aki.tuomi at dovecot.fi>:
> 
> > Hi!
> >
> > Responses in middle.
> >
> > Aki
> >
> > On 06.04.2017 06:05, Hongying Liu wrote:
> > > Hi sbr-services,
> > >
> > > Could you give me some idea?
> > >
> > > ### abrt reported the error as below.
> > > [root at cupop4 log]# abrt-cli list --since 1488267244 id
> > > ad716dbfd3a68bbe0f055e32ebfe562f4f75df43
> > > reason:         imap killed by SIGBUS
> > > time:           Sun Mar 19  2017 10:58:27 AM JST
> > > cmdline:        dovecot/imap
> > > package:        dovecot-2.2.10-7.el7
> > > uid:            80180 (acaa2325)
> > > count:          2
> > > Directory:      /var/spool/abrt/ccpp-2017-03-19-10:58:27-4904
> > > 'abrt-cli report
?????/var/spool/abrt/ccpp-2017-03-19-10:58:27-4904'
> > >
> > >
> > > ### /var/log/messages
> > > Mar 19 10:58:27 cupop4 abrt-hook-ccpp: Process 4904 (imap) of
user 80180
> > > killed by SIGBUS - dumping core
> > >
> > > And, there are lots of ldap error in /var/log/messages. Dovecot
uses the
> > > ldap as userdb and passwddb.
> > > Is the ldap error related to imap crash?
> > >
> > > Mar 19 10:58:21 cupop4 nslcd[1534]: [a378de]
<group/member="postfix">
> > > ldap_result() failed: Invalid DN syntax: Invalid DN
> >
> > This looks like an invalid DN syntax.
> >
> > >
> > > ### /var/log/dovecot
> > >
> > > Mar 19 10:58:27 cupop4 dovecot: imap(acaa2325): Fatal: master:
> > > service(imap): child 4904 killed with signal 7 (core dumped)
> > >
> > Can you do p cache, p cache->hdr, p cache->hdr->file_seq and
p reset_id
> >
> > > ### gdb
> > >
> > > Core was generated by `dovecot/imap'.
> > > Program terminated with signal 7, Bus error.
> > > #0  0x00007fc4a69f293e in mail_cache_lookup_offset
(cache=0x7fc4a811a320,
> > > view=<optimized out>, seq=<optimized out>,
offset_r=offset_r at entry
> > > =0x7ffe23a98900)
> > >     at mail-cache-lookup.c:95
> > > 95 while (cache->hdr->file_seq != reset_id) {
> > > (gdb) bt
> > > #0  0x00007fc4a69f293e in mail_cache_lookup_offset
(cache=0x7fc4a811a320,
> > > view=<optimized out>, seq=<optimized out>,
offset_r=offset_r at entry
> > > =0x7ffe23a98900)
> > >     at mail-cache-lookup.c:95
> > > #1  0x00007fc4a69f2afa in mail_cache_lookup_iter_init
> > > (view=view at entry=0x7fc4a81332b0,
> > > seq=<optimized out>, ctx_r=ctx_r at entry=0x7ffe23a988e0)
> > >     at mail-cache-lookup.c:154
> > > #2  0x00007fc4a69f2f8f in mail_cache_seq (seq=<optimized
out>,
> > > view=0x7fc4a81332b0) at mail-cache-lookup.c:322
> > > #3  mail_cache_field_exists (view=view at entry=0x7fc4a81332b0,
> > seq=seq at entry=760,
> > > field=field at entry=4) at mail-cache-lookup.c:352
> > > #4  0x00007fc4a69f3151 in mail_cache_lookup_field
(view=0x7fc4a81332b0,
> > > dest_buf=dest_buf at entry=0x7ffe23a98a00, seq=760,
> > field_idx=field_idx at entry
> > > =4)
> > >     at mail-cache-lookup.c:413
> > > #5  0x00007fc4a69d9439 in index_mail_cache_lookup_field
> > > (mail=mail at entry=0x7fc4a8128cd0,
> > > buf=buf at entry=0x7ffe23a98a00, field_idx=field_idx at entry=4)
> > >     at index-mail.c:68
> > > #6  0x00007fc4a69d94a7 in index_mail_get_fixed_field
> > (mail=0x7fc4a8128cd0,
> > > field=<optimized out>, data=<optimized out>,
data_size=8) at
> > > index-mail.c:130
> > > #7  0x00007fc4a69d9fed in index_mail_get_cached_virtual_size
> > > (mail=mail at entry=0x7fc4a8128cd0, size_r=size_r at
entry=0x7ffe23a98b20) at
> > > index-mail.c:403
> > > #8  0x00007fc4a6987c1b in maildir_mail_get_virtual_size
> > > (_mail=0x7fc4a8128cd0, size_r=0x7ffe23a98b20) at
maildir-mail.c:388
> > > #9  0x00007fc4a69d9719 in index_mail_update_access_parts
> > > (mail=mail at entry=0x7fc4a8128cd0)
> > > at index-mail.c:1490
> > > #10 0x00007fc4a69dbb93 in index_mail_set_seq
(_mail=0x7fc4a8128cd0,
> > > seq=760, saving=<optimized out>) at index-mail.c:1521
> > > #11 0x00007fc4a69e28cb in search_more_with_mail
(mail=0x7fc4a8128cd0,
> > > ctx=0x7fc4a8132730) at index-search.c:1507
> > > #12 search_more_with_prefetching (mail_r=<optimized out>,
ctx=<optimized
> > > out>) at index-search.c:1579
> > > #13 search_more (ctx=ctx at entry=0x7fc4a8132730,
> > > mail_r=mail_r at entry=0x7ffe23a98c20)
> > > at index-search.c:1650
> > > #14 0x00007fc4a69e2ff4 in index_storage_search_next_nonblock
> > > (_ctx=0x7fc4a8132730, mail_r=0x7fc4a81120d8,
tryagain_r=0x7ffe23a98c87)
> > at
> > > index-search.c:1674
> > > #15 0x00007fc4a69bc4ef in mailbox_search_next_nonblock
> > > (ctx=ctx at entry=0x7fc4a8132730,
> > > mail_r=mail_r at entry=0x7fc4a81120d8,
> > >     tryagain_r=tryagain_r at entry=0x7ffe23a98c87) at
mail-storage.c:1787
> > > #16 0x00007fc4a69bc55d in mailbox_search_next
(ctx=0x7fc4a8132730,
> > > mail_r=mail_r at entry=0x7fc4a81120d8) at mail-storage.c:1773
> > > #17 0x00007fc4a6e97874 in imap_fetch_more_int (ctx=ctx at entry
> > =0x7fc4a8112078,
> > > cancel=false) at imap-fetch.c:479
> > > #18 0x00007fc4a6e98852 in imap_fetch_more (ctx=0x7fc4a8112078,
> > > cmd=cmd at entry=0x7fc4a8111ed0)
> > > at imap-fetch.c:556
> > > #19 0x00007fc4a6e8c17d in cmd_fetch (cmd=0x7fc4a8111ed0) at
> > cmd-fetch.c:284
> > > #20 0x00007fc4a6e9601c in command_exec (cmd=cmd at
entry=0x7fc4a8111ed0) at
> > > imap-commands.c:158
> > > #21 0x00007fc4a6e94f1f in client_command_input (cmd=cmd at entry
> > =0x7fc4a8111ed0)
> > > at imap-client.c:780
> > > #22 0x00007fc4a6e95005 in client_command_input
(cmd=0x7fc4a8111ed0) at
> > > imap-client.c:841
> > > #23 0x00007fc4a6e952fd in client_handle_next_command
> > > (remove_io_r=<synthetic pointer>, client=0x7fc4a8111530) at
> > > imap-client.c:879
> > > #24 client_handle_input (client=client at entry=0x7fc4a8111530)
at
> > > imap-client.c:891
> > > #25 0x00007fc4a6e956c5 in client_input (client=0x7fc4a8111530) at
> > > imap-client.c:933
> > > #26 0x00007fc4a66e1a87 in io_loop_call_io (io=0x7fc4a811edd0) at
> > > ioloop.c:388
> > > #27 0x00007fc4a66e290f in io_loop_handler_run
> > > (ioloop=ioloop at entry=0x7fc4a80fc750)
> > > at ioloop-epoll.c:220
> > > #28 0x00007fc4a66e15d8 in io_loop_run (ioloop=0x7fc4a80fc750) at
> > > ioloop.c:412
> > > #29 0x00007fc4a668e9e3 in master_service_run
(service=0x7fc4a80fc5e0,
> > > callback=callback at entry=0x7fc4a6e9ed70
<client_connected>) at
> > > master-service.c:571
> > > #30 0x00007fc4a6e89324 in main (argc=1, argv=0x7fc4a80fc390) at
> > main.c:400
> > >
> > > Thank you.
> > >
> > > Best regards,
> > > Hongying Liu
> >
> >

Sorry for late response.

This issue occurs ran randomly. So I don't know how to run valgrind command.

2017-04-10 17:14 GMT+08:00 Hongying Liu <hongyliu at redhat.com>:
> Sorry for late response.
>
> This issue occurs ran randomly. So I don't know how to run valgrind
> command.
>
> I upload the coredump.
>
> The version of dovecot is dovecot-2.2.10-7.el7.x86_64.
>
> 2017-04-07 14:07 GMT+08:00 Aki Tuomi <aki.tuomi at dovecot.fi>:
>
>> Please keep responses on list.
>>
>> Can you please run valgrind on this, as it appears to be some sort of
>> memory corruption issue.
>>
>> Aki
>>
>> > On April 7, 2017 at 5:37 AM Hongying Liu <hongyliu at
redhat.com> wrote:
>> >
>> >
>> > Thanks for your response.
>> >
>> > (gdb) p cache
>> > $1 = (struct mail_cache *) 0x7fc4a811a320
>> > (gdb) p cache->hdr
>> > $2 = (const struct mail_cache_header *) 0x7fc4a6ddb000
>> > (gdb) p cache->hdr->file_seq
>> > Cannot access memory at address 0x7fc4a6ddb008   <----
>> > (gdb) p reset_id
>> > $3 = 1488892251
>> >
>> >
>> > 2017-04-06 19:34 GMT+08:00 Aki Tuomi <aki.tuomi at
dovecot.fi>:
>> >
>> > > Hi!
>> > >
>> > > Responses in middle.
>> > >
>> > > Aki
>> > >
>> > > On 06.04.2017 06:05, Hongying Liu wrote:
>> > > > Hi sbr-services,
>> > > >
>> > > > Could you give me some idea?
>> > > >
>> > > > ### abrt reported the error as below.
>> > > > [root at cupop4 log]# abrt-cli list --since 1488267244
id
>> > > > ad716dbfd3a68bbe0f055e32ebfe562f4f75df43
>> > > > reason:         imap killed by SIGBUS
>> > > > time:           Sun Mar 19  2017 10:58:27 AM JST
>> > > > cmdline:        dovecot/imap
>> > > > package:        dovecot-2.2.10-7.el7
>> > > > uid:            80180 (acaa2325)
>> > > > count:          2
>> > > > Directory:     
/var/spool/abrt/ccpp-2017-03-19-10:58:27-4904
>> > > > 'abrt-cli report ?????/var/spool/abrt/ccpp-2017
>> -03-19-10:58:27-4904'
>> > > >
>> > > >
>> > > > ### /var/log/messages
>> > > > Mar 19 10:58:27 cupop4 abrt-hook-ccpp: Process 4904
(imap) of user
>> 80180
>> > > > killed by SIGBUS - dumping core
>> > > >
>> > > > And, there are lots of ldap error in /var/log/messages.
Dovecot
>> uses the
>> > > > ldap as userdb and passwddb.
>> > > > Is the ldap error related to imap crash?
>> > > >
>> > > > Mar 19 10:58:21 cupop4 nslcd[1534]: [a378de]
>> <group/member="postfix">
>> > > > ldap_result() failed: Invalid DN syntax: Invalid DN
>> > >
>> > > This looks like an invalid DN syntax.
>> > >
>> > > >
>> > > > ### /var/log/dovecot
>> > > >
>> > > > Mar 19 10:58:27 cupop4 dovecot: imap(acaa2325): Fatal:
master:
>> > > > service(imap): child 4904 killed with signal 7 (core
dumped)
>> > > >
>> > > Can you do p cache, p cache->hdr, p
cache->hdr->file_seq and p
>> reset_id
>> > >
>> > > > ### gdb
>> > > >
>> > > > Core was generated by `dovecot/imap'.
>> > > > Program terminated with signal 7, Bus error.
>> > > > #0  0x00007fc4a69f293e in mail_cache_lookup_offset
>> (cache=0x7fc4a811a320,
>> > > > view=<optimized out>, seq=<optimized out>,
offset_r=offset_r at entry
>> > > > =0x7ffe23a98900)
>> > > >     at mail-cache-lookup.c:95
>> > > > 95 while (cache->hdr->file_seq != reset_id) {
>> > > > (gdb) bt
>> > > > #0  0x00007fc4a69f293e in mail_cache_lookup_offset
>> (cache=0x7fc4a811a320,
>> > > > view=<optimized out>, seq=<optimized out>,
offset_r=offset_r at entry
>> > > > =0x7ffe23a98900)
>> > > >     at mail-cache-lookup.c:95
>> > > > #1  0x00007fc4a69f2afa in mail_cache_lookup_iter_init
>> > > > (view=view at entry=0x7fc4a81332b0,
>> > > > seq=<optimized out>, ctx_r=ctx_r at
entry=0x7ffe23a988e0)
>> > > >     at mail-cache-lookup.c:154
>> > > > #2  0x00007fc4a69f2f8f in mail_cache_seq
(seq=<optimized out>,
>> > > > view=0x7fc4a81332b0) at mail-cache-lookup.c:322
>> > > > #3  mail_cache_field_exists (view=view at
entry=0x7fc4a81332b0,
>> > > seq=seq at entry=760,
>> > > > field=field at entry=4) at mail-cache-lookup.c:352
>> > > > #4  0x00007fc4a69f3151 in mail_cache_lookup_field
>> (view=0x7fc4a81332b0,
>> > > > dest_buf=dest_buf at entry=0x7ffe23a98a00, seq=760,
>> > > field_idx=field_idx at entry
>> > > > =4)
>> > > >     at mail-cache-lookup.c:413
>> > > > #5  0x00007fc4a69d9439 in index_mail_cache_lookup_field
>> > > > (mail=mail at entry=0x7fc4a8128cd0,
>> > > > buf=buf at entry=0x7ffe23a98a00, field_idx=field_idx at
entry=4)
>> > > >     at index-mail.c:68
>> > > > #6  0x00007fc4a69d94a7 in index_mail_get_fixed_field
>> > > (mail=0x7fc4a8128cd0,
>> > > > field=<optimized out>, data=<optimized out>,
data_size=8) at
>> > > > index-mail.c:130
>> > > > #7  0x00007fc4a69d9fed in
index_mail_get_cached_virtual_size
>> > > > (mail=mail at entry=0x7fc4a8128cd0, size_r=size_r at
entry=0x7ffe23a98b20)
>> at
>> > > > index-mail.c:403
>> > > > #8  0x00007fc4a6987c1b in maildir_mail_get_virtual_size
>> > > > (_mail=0x7fc4a8128cd0, size_r=0x7ffe23a98b20) at
maildir-mail.c:388
>> > > > #9  0x00007fc4a69d9719 in index_mail_update_access_parts
>> > > > (mail=mail at entry=0x7fc4a8128cd0)
>> > > > at index-mail.c:1490
>> > > > #10 0x00007fc4a69dbb93 in index_mail_set_seq
(_mail=0x7fc4a8128cd0,
>> > > > seq=760, saving=<optimized out>) at
index-mail.c:1521
>> > > > #11 0x00007fc4a69e28cb in search_more_with_mail
>> (mail=0x7fc4a8128cd0,
>> > > > ctx=0x7fc4a8132730) at index-search.c:1507
>> > > > #12 search_more_with_prefetching (mail_r=<optimized
out>,
>> ctx=<optimized
>> > > > out>) at index-search.c:1579
>> > > > #13 search_more (ctx=ctx at entry=0x7fc4a8132730,
>> > > > mail_r=mail_r at entry=0x7ffe23a98c20)
>> > > > at index-search.c:1650
>> > > > #14 0x00007fc4a69e2ff4 in
index_storage_search_next_nonblock
>> > > > (_ctx=0x7fc4a8132730, mail_r=0x7fc4a81120d8,
>> tryagain_r=0x7ffe23a98c87)
>> > > at
>> > > > index-search.c:1674
>> > > > #15 0x00007fc4a69bc4ef in mailbox_search_next_nonblock
>> > > > (ctx=ctx at entry=0x7fc4a8132730,
>> > > > mail_r=mail_r at entry=0x7fc4a81120d8,
>> > > >     tryagain_r=tryagain_r at entry=0x7ffe23a98c87) at
>> mail-storage.c:1787
>> > > > #16 0x00007fc4a69bc55d in mailbox_search_next
(ctx=0x7fc4a8132730,
>> > > > mail_r=mail_r at entry=0x7fc4a81120d8) at
mail-storage.c:1773
>> > > > #17 0x00007fc4a6e97874 in imap_fetch_more_int (ctx=ctx
at entry
>> > > =0x7fc4a8112078,
>> > > > cancel=false) at imap-fetch.c:479
>> > > > #18 0x00007fc4a6e98852 in imap_fetch_more
(ctx=0x7fc4a8112078,
>> > > > cmd=cmd at entry=0x7fc4a8111ed0)
>> > > > at imap-fetch.c:556
>> > > > #19 0x00007fc4a6e8c17d in cmd_fetch (cmd=0x7fc4a8111ed0)
at
>> > > cmd-fetch.c:284
>> > > > #20 0x00007fc4a6e9601c in command_exec (cmd=cmd at
entry=0x7fc4a8111ed0)
>> at
>> > > > imap-commands.c:158
>> > > > #21 0x00007fc4a6e94f1f in client_command_input (cmd=cmd
at entry
>> > > =0x7fc4a8111ed0)
>> > > > at imap-client.c:780
>> > > > #22 0x00007fc4a6e95005 in client_command_input
(cmd=0x7fc4a8111ed0)
>> at
>> > > > imap-client.c:841
>> > > > #23 0x00007fc4a6e952fd in client_handle_next_command
>> > > > (remove_io_r=<synthetic pointer>,
client=0x7fc4a8111530) at
>> > > > imap-client.c:879
>> > > > #24 client_handle_input (client=client at
entry=0x7fc4a8111530) at
>> > > > imap-client.c:891
>> > > > #25 0x00007fc4a6e956c5 in client_input
(client=0x7fc4a8111530) at
>> > > > imap-client.c:933
>> > > > #26 0x00007fc4a66e1a87 in io_loop_call_io
(io=0x7fc4a811edd0) at
>> > > > ioloop.c:388
>> > > > #27 0x00007fc4a66e290f in io_loop_handler_run
>> > > > (ioloop=ioloop at entry=0x7fc4a80fc750)
>> > > > at ioloop-epoll.c:220
>> > > > #28 0x00007fc4a66e15d8 in io_loop_run
(ioloop=0x7fc4a80fc750) at
>> > > > ioloop.c:412
>> > > > #29 0x00007fc4a668e9e3 in master_service_run
>> (service=0x7fc4a80fc5e0,
>> > > > callback=callback at entry=0x7fc4a6e9ed70
<client_connected>) at
>> > > > master-service.c:571
>> > > > #30 0x00007fc4a6e89324 in main (argc=1,
argv=0x7fc4a80fc390) at
>> > > main.c:400
>> > > >
>> > > > Thank you.
>> > > >
>> > > > Best regards,
>> > > > Hongying Liu
>> > >
>> > >
>>
>
>