Crash when using dict quotas with sqlite database

[Marcel Menzel]

Hello Aki,

unfortunately, this patch is already in my source files, as patch
refuses to apply it:

  -> Applying patch fix-sqlite.patch
patching file src/lib-sql/driver-sqlite.c
Reversed (or previously applied) patch detected!  Skipping patch.
2 out of 2 hunks ignored -- saving rejects to file
src/lib-sql/driver-sqlite.c.rej

I verified it by looking in the source code and indeed, this patch is
already applied.

- Marcel

Am 03.02.2019 um 15:25 schrieb Aki Tuomi:
> Can you try if applying
>
> https://github.com/dovecot/core/commit/b291ff1fd61b47639a2db99bd858c9511945f4ab.patch
>
>
> helps?
>
> Aki
>> On 03 February 2019 at 16:20 Marcel Menzel < mail at mcl.gg
>> <mailto:mail at mcl.gg>> wrote:
>>
>>
>> Hello Aki,
>>
>> Arch Linux doesn't have install-able debug symbols for Dovecot. That's
>> why I just compiled the package for myself with enabled debug symbols
>> (by editing the makepkg.conf).
>>
>> I've attached the output from gdb's bt full.
>>
>> - Marcel
>>
>> Am 03.02.2019 um 14:45 schrieb Aki Tuomi:
>>> You need to install debug symbols. Not sure how this is done in arch
>>> linux though.
>>> Aki
>>>> On 03 February 2019 at 15:02 Marcel Menzel < mail at mcl.gg
>>>> <mailto:mail at mcl.gg>
>>>> <mailto: mail at mcl.gg <mailto:mail at mcl.gg>>> wrote:
>> >>
>> >> Hello John,
>> >>
>> >> I tried (until now) to get a valuable backtrace, but it seems that
>> GDB
>> >> can't resolve all symbols.
>> >> This is what systemd-coredump is giving me:
>> >>
>> >> Stack trace of thread 22359:
>> >> #0  0x0000638167eaf062 event_unref (libdovecot.so.0)
>> >> #1  0x000004a58a212151 n/a (dict)
>> >> #2  0x000004a58a211333 n/a (dict)
>> >> #3  0x000004a58a20514d n/a (dict)
>> >> #4  0x0000638167e556f2 dict_transaction_begin (libdovecot.so.0)
>> >> #5  0x000004a58a203b06 n/a (dict)
>> >> #6  0x000004a58a2045ff dict_command_input (dict)
>> >> #7  0x000004a58a202a31 n/a (dict)
>> >> #8  0x000004a58a202b35 n/a (dict)
>> >> #9  0x0000638167eaacfd io_loop_call_io (libdovecot.so.0)
>> >> #10 0x0000638167eac635 io_loop_handler_run_internal (libdovecot.so.0)
>> >> #11 0x0000638167eaadc7 io_loop_handler_run (libdovecot.so.0)
>> >> #12 0x0000638167eaaf68 io_loop_run (libdovecot.so.0)
>> >> #13 0x0000638167e1b36a master_service_run (libdovecot.so.0)
>> >> #14 0x000004a58a202300 main (dict)
>> >> #15 0x0000638167a17223 __libc_start_main (libc.so.6)
>> >> #16 0x000004a58a2023fe _start (dict)
>> >>
>> >> GDB's "bt full" won't give anything more here, I might compile
>> Dovecot
>> >> with debug symbols enabled as soon as I have a little more time:
>> >>
>> >> (gdb) bt full
>> >> #0  0x0000638167eaf062 in event_unref () from
>> >> /usr/lib/dovecot/libdovecot.so.0
>> >> No symbol table info available.
>> >> #1  0x000004a58a212151 in ?? ()
>> >> No symbol table info available.
>> >> #2  0x000004a58a211333 in ?? ()
>> >> No symbol table info available.
>> >> #3  0x000004a58a20514d in ?? ()
>> >> No symbol table info available.
>> >> #4  0x0000638167e556f2 in dict_transaction_begin () from
>> >> /usr/lib/dovecot/libdovecot.so.0
>> >> No symbol table info available.
>> >> #5  0x000004a58a203b06 in ?? ()
>> >> No symbol table info available.
>> >> #6  0x000004a58a2045ff in dict_command_input ()
>> >> No symbol table info available.
>> >> #7  0x000004a58a202a31 in ?? ()
>> >> No symbol table info available.
>> >> #8  0x000004a58a202b35 in ?? ()
>> >> No symbol table info available.
>> >> #9  0x0000638167eaacfd in io_loop_call_io () from
>> >> /usr/lib/dovecot/libdovecot.so.0
>> >> No symbol table info available.
>> >> #10 0x0000638167eac635 in io_loop_handler_run_internal () from
>> >> /usr/lib/dovecot/libdovecot.so.0
>> >> No symbol table info available.
>> >> #11 0x0000638167eaadc7 in io_loop_handler_run () from
>> >> /usr/lib/dovecot/libdovecot.so.0
>> >> No symbol table info available.
>> >> #12 0x0000638167eaaf68 in io_loop_run () from
>> >> /usr/lib/dovecot/libdovecot.so.0
>> >> No symbol table info available.
>> >> #13 0x0000638167e1b36a in master_service_run () from
>> >> /usr/lib/dovecot/libdovecot.so.0
>> >> No symbol table info available.
>> >> #14 0x000004a58a202300 in main ()
>> >> No symbol table info available.
>> >>
>> >> - Marcel
>> >>
>> >> Am 03.02.2019 um 09:08 schrieb John Fawcett:
>> >>> On 01/02/2019 20:40, Marcel Menzel wrote:
>> >>>> Hello,
>> >> >>
>> >> >> After I configured a SQLite backed dict quota backend, the dict
>> >> process
>> >> >> crashes every time a quota operation is happening.
>> >> >>
>> >> >> SQLite: 3.26.0
>> >> >>
>> >> >> Dovecot: 2.3.4 (0ecbaf23d)
>> >> >>
>> >> >> Linux: 4.20.4.a-1-hardened #1 SMP PREEMPT Fri Jan 25 01:24:51 CET
>> >> 2019
>> >> >> x86_64 GNU/Linux (Arch Linux)
>> >> >>
>> >> >> Filesystem: BTRFS
>> >> >>
>> >> >>
>> >> >> I can't get any debug output from Dovecot, even after setting
>> >> log_debug
>> >> >> = cat:* event:* source:* field:*=*
>> >> >>
>> >> >> dovecot[6457]: dict(6687): Debug: sqlite: Finished query 'BEGIN
>> >> >> TRANSACTION' in 0 msecs
>> >> >> dovecot[6457]: dict(6687): Fatal: master: service(dict): child
>> 6687
>> >> >> killed with signal 11 (core dumped)
>> >> >>
>> >> >>
>> >> >> I've attached the output of dovecot -n and the coredump file from
>> >> >> systemd-coredump.
>> >> >>
>> >> >>
>> >> >> Kind regards,
>> >> >>
>> >> >> Marcel Menzel
>> >> >>
>> >>> Any chance of posting a backtrace?
>> >>> John
>> >
>>> ---
>>> Aki Tuomi
>
> ---
> Aki Tuomi
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