Re: abrt reported "imap killed by SIGBUS"

10 Apr 2017


      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@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@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@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@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@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 を実行する/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]

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@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@entry
=0x7ffe23a98900)
at mail-cache-lookup.c:95
#1  0x00007fc4a69f2afa in mail_cache_lookup_iter_init
(view=view@entry=0x7fc4a81332b0,
seq=<optimized out>, ctx_r=ctx_r@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@entry=0x7fc4a81332b0,
seq=seq@entry=760,
field=field@entry=4) at mail-cache-lookup.c:352
#4  0x00007fc4a69f3151 in mail_cache_lookup_field
(view=0x7fc4a81332b0,
dest_buf=dest_buf@entry=0x7ffe23a98a00, seq=760,
field_idx=field_idx@entry
=4)
at mail-cache-lookup.c:413
#5  0x00007fc4a69d9439 in index_mail_cache_lookup_field
(mail=mail@entry=0x7fc4a8128cd0,
buf=buf@entry=0x7ffe23a98a00, field_idx=field_idx@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@entry=0x7fc4a8128cd0, size_r=size_r@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@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@entry=0x7fc4a8132730,
mail_r=mail_r@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@entry=0x7fc4a8132730,
mail_r=mail_r@entry=0x7fc4a81120d8,
tryagain_r=tryagain_r@entry=0x7ffe23a98c87) at
mail-storage.c:1787
#16 0x00007fc4a69bc55d in mailbox_search_next (ctx=0x7fc4a8132730,
mail_r=mail_r@entry=0x7fc4a81120d8) at mail-storage.c:1773
#17 0x00007fc4a6e97874 in imap_fetch_more_int (ctx=ctx@entry
=0x7fc4a8112078,
cancel=false) at imap-fetch.c:479
#18 0x00007fc4a6e98852 in imap_fetch_more (ctx=0x7fc4a8112078,
cmd=cmd@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@entry=0x7fc4a8111ed0)
at
imap-commands.c:158
#21 0x00007fc4a6e94f1f in client_command_input (cmd=cmd@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@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@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@entry=0x7fc4a6e9ed70 ) at
master-service.c:571
#30 0x00007fc4a6e89324 in main (argc=1, argv=0x7fc4a80fc390) at
main.c:400
Thank you.
Best regards,
Hongying Liu

Hongying Liu

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