Panic

[Aki Tuomi]

Can you please include excerpt of your logs too? There should be "Panic:
..something..." there.

also bt full is more useful than just bt.

Aki

On 27.09.2017 15:21, Matthijs Kooijman wrote:
> (I'm not subscribed, please keep me CC'd)
>
> Hi,
>
> since a few months I'm experiencing repeated dovecot crashes. I mostly
> see them in the logs, I haven't had any users complain, so I haven't
> looked closely until now. I was originally using an older version fro
> mDebian and hoped that a newer future version would already fix this,
> but I just upgraded to version 1:2.2.32-2 from Debian testing, and the problem
> persists.
>
> This crash sometimes happens occasionally, but often happens repeatedly
> for some time (presumably a client keeps retrying) but can also be gone
> for hours or days (presumably the client no longer connects). I haven't
> been able to definitively figure out what client causes this, but based
> on the user ID I suspect it is Mail.app on OSX.
>
> I managed to get a core dump, which gave me the stacktrace below. I've also
> attached my config file. If any other details are relevant, just ask and I can
> squeeze them out of the core dump (but I'd rather not publicly share the file).
> I can probably set up rawlog to capture the actual IMAP session if needed,
> though I have no time for that right now.
>
> Gr.
>
> Matthijs
>
> 51      ../sysdeps/unix/sysv/linux/raise.c: No such file or directory.
> (gdb) bt
> #0  __GI_raise (sig=sig at entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
> #1  0x00007fc5eed9c3fa in __GI_abort () at abort.c:89
> #2  0x00007fc5ef1a609a in default_fatal_finish (type=LOG_TYPE_PANIC, status=status at entry=0) at failures.c:201
> #3  0x00007fc5ef1a619a in i_internal_fatal_handler (ctx=0x7ffc553b38d0, format=<optimized out>, args=<optimized out>) at failures.c:670
> #4  0x00007fc5ef136cf8 in i_panic (format=format at entry=0x7fc5ef52e880 "file %s: line %d (%s): assertion failed: (%s)") at failures.c:275
> #5  0x00007fc5ef47f998 in mailbox_copy_int (_ctx=_ctx at entry=0x7ffc553b3ab0, mail=<optimized out>) at mail-storage.c:2473
> #6  0x00007fc5ef47f9ff in mailbox_copy (_ctx=_ctx at entry=0x7ffc553b3ab0, mail=<optimized out>) at mail-storage.c:2489
> #7  0x000055bae72a2f5f in fetch_and_copy (copy_count_r=<synthetic pointer>, src_uidset_r=<synthetic pointer>, search_args=<optimized out>, src_trans_r=0x7ffc553b3a88, t=<optimized out>, move=<optimized out>,
>     cmd=0x55bae816d5e8) at cmd-copy.c:72
> #8  cmd_copy_full (cmd=0x55bae816d5e8, move=false) at cmd-copy.c:139
> #9  0x000055bae72afd9c in command_exec (cmd=cmd at entry=0x55bae816d5e8) at imap-commands.c:200
> #10 0x000055bae72ae322 in client_command_input (cmd=<optimized out>, cmd at entry=0x55bae816d5e8) at imap-client.c:1088
> #11 0x000055bae72ae3bc in client_command_input (cmd=<optimized out>) at imap-client.c:1148
> #12 0x000055bae72ae77d in client_handle_next_command (remove_io_r=<synthetic pointer>, client=0x55bae816bcf8) at imap-client.c:1190
> #13 client_handle_input (client=0x55bae816bcf8) at imap-client.c:1202
> #14 0x000055bae72aeccc in client_input (client=0x55bae816bcf8) at imap-client.c:1249
> #15 0x00007fc5ef1bb742 in io_loop_call_io (io=0x55bae816d4e0) at ioloop.c:599
> #16 0x00007fc5ef1bcd8e in io_loop_handler_run_internal (ioloop=ioloop at entry=0x55bae8153990) at ioloop-epoll.c:223
> #17 0x00007fc5ef1bb7d6 in io_loop_handler_run (ioloop=ioloop at entry=0x55bae8153990) at ioloop.c:648
> #18 0x00007fc5ef1bb988 in io_loop_run (ioloop=0x55bae8153990) at ioloop.c:623
> #19 0x00007fc5ef141353 in master_service_run (service=0x55bae8153830, callback=<optimized out>) at master-service.c:666
> #20 0x000055bae72a1139 in main (argc=<optimized out>, argv=<optimized out>) at main.c:491
> (gdb) up 9
> #9  0x000055bae72afd9c in command_exec (cmd=cmd at entry=0x55bae816d5e8) at imap-commands.c:200
> 200             finished = cmd->func(cmd);
> (gdb) p *cmd
> $14 = {prev = 0x0, next = 0x0, client = 0x55bae816bcf8, pool = 0x55bae816d5c0, tag = 0x55bae816d750 "7.119309", name = 0x55bae816d760 "UID COPY", args = 0x55bae816d770 "20004 INBOX",
>   human_args = 0x55bae816d780 "20004 INBOX", cmd_flags = COMMAND_FLAG_BREAKS_SEQS, tagline_reply = 0x0, func = 0x55bae72a33e0 <cmd_copy>, context = 0x0, module_contexts = {arr = {buffer = 0x55bae816d6e8,
>       element_size = 8}, v = 0x55bae816d6e8, v_modifiable = 0x55bae816d6e8}, parser = 0x55bae8157aa0, state = CLIENT_COMMAND_STATE_WAIT_INPUT, stats = {start_time = {tv_sec = 1506507612, tv_usec = 777163},
>     last_run_timeval = {tv_sec = 1506507612, tv_usec = 777163}, start_ioloop_wait_usecs = 46340, running_usecs = 0, lock_wait_usecs = 0, bytes_in = 0, bytes_out = 0}, stats_start = {timeval = {
>       tv_sec = 1506507612, tv_usec = 777241}, lock_wait_usecs = 0, bytes_in = 91, bytes_out = 852}, sync = 0x0, uid = 1, cancel = 0, param_error = 0, search_save_result = 0, search_save_result_used = 0,
>   temp_executed = 0, tagline_sent = 0, executing = 1}
> (gdb) down
> #8  cmd_copy_full (cmd=0x55bae816d5e8, move=false) at cmd-copy.c:139
> 139             ret = fetch_and_copy(cmd, move, t, &src_trans, search_args,
> (gdb)
> #7  0x000055bae72a2f5f in fetch_and_copy (copy_count_r=<synthetic pointer>, src_uidset_r=<synthetic pointer>, search_args=<optimized out>, src_trans_r=0x7ffc553b3a88, t=<optimized out>, move=<optimized out>,
>     cmd=0x55bae816d5e8) at cmd-copy.c:72
> 72                              if (mailbox_copy(&save_ctx, mail) < 0)
> (gdb)
> #6  0x00007fc5ef47f9ff in mailbox_copy (_ctx=_ctx at entry=0x7ffc553b3ab0, mail=<optimized out>) at mail-storage.c:2489
> 2489            return mailbox_copy_int(_ctx, mail);
> (gdb)
> #5  0x00007fc5ef47f998 in mailbox_copy_int (_ctx=_ctx at entry=0x7ffc553b3ab0, mail=<optimized out>) at mail-storage.c:2473
> 2473            i_assert(!ctx->unfinished);
> (gdb)
> #4  0x00007fc5ef136cf8 in i_panic (format=format at entry=0x7fc5ef52e880 "file %s: line %d (%s): assertion failed: (%s)") at failures.c:275
> 275             fatal_handler(&ctx, format, args);
>