Re: Crash when using dict quotas with sqlite database

3 Feb 2019 · *=*

      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/b291ff1fd61b47639a2db99bd858c9511945f...
helps?
Aki
...
On 03 February 2019 at 16:20 Marcel Menzel < mail@mcl.gg
mailto:mail@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@mcl.gg
mailto:mail@mcl.gg
mailto:mail@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

...
On 01/02/2019 20:40, Marcel Menzel wrote:
...
Hello,
After I configured a SQLite backed dict quota backend, the dict
Am 03.02.2019 um 09:08 schrieb John Fawcett:
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