dovecot - Oct 2018 - 2.3.3: Panic: file ostream-zlib.c: line 37 (o_stream_zlib_close): assertion failed

I see this in my logs after 2.3.3:

using zlib plugin, ofc.

Oct 02 10:01:39 imap(user at example.com)<50643></2k4Sjp3vMqC496W>:
Panic:
file ostream-zlib.c: line 37 (o_stream_zlib_close): assertion failed: 
(zstream->ostream.finished || zstream->ostream.ostream.stream_errno != 0 
|| zstream->ostream.error_handling_disabled)
Oct 02 10:01:39 imap(user at example.com)<50643></2k4Sjp3vMqC496W>:
Error:
Raw backtrace: /usr/lib64/dovecot/libdovecot.so.0(+0xce56a) 
[0x7f442487556a] -> /usr/lib64/dovecot/libdovecot.so.0(+0xce5b1) 
[0x7f44248755b1] -> /usr/lib64/dovecot/libdovecot.so.0(+0x3d941) 
[0x7f44247e4941] -> /usr/lib64/dovecot/lib20_zlib_plugin.so(+0x5cdf) 
[0x7f44233c4cdf] -> /usr/lib64/dovecot/libdovecot.so.0(+0xf4b46) 
[0x7f442489bb46] -> 
/usr/lib64/dovecot/libdovecot.so.0(o_stream_destroy+0x13) 
[0x7f442489be83] -> 
/usr/lib64/dovecot/libdovecot-storage.so.0(maildir_save_finish+0x173) 
[0x7f4424b93973] -> 
/usr/lib64/dovecot/libdovecot-storage.so.0(mailbox_save_cancel+0x36) 
[0x7f4424b68696] -> dovecot/imap [user at example.com X.X.X.X 
APPEND](+0xede9) [0x55a9d7e86de9] -> dovecot/imap [user at example.com 
X.X.X.X APPEND](command_exec+0x65) [0x55a9d7e956e5] -> dovecot/imap 
[user at example.com X.X.X.X APPEND](+0xf9e6) [0x55a9d7e879e6] -> 
/usr/lib64/dovecot/libdovecot.so.0(io_loop_call_io+0x55) 
[0x7f442488c275] -> 
/usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0xbf) 
[0x7f442488e13f] -> 
/usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run+0x55) 
[0x7f442488c365] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_run+0x38) 
[0x7f442488c588] -> 
/usr/lib64/dovecot/libdovecot.so.0(master_service_run+0x13) 
[0x7f4424808053] -> dovecot/imap [user at example.com X.X.X.X 
APPEND](main+0x32d) [0x55a9d7ea20dd] -> 
/lib64/libc.so.6(__libc_start_main+0x100) [0x7f4424431d20] -> 
dovecot/imap [user at example.com X.X.X.X APPEND](+0xe419) [0x55a9d7e86419]

No clue how to reproduce


-- 
Tom

On 2 Oct 2018, at 12.26, Tom Sommer <mail at tomsommer.dk>
wrote:
> 
> I see this in my logs after 2.3.3:
> 
> using zlib plugin, ofc.
> 
> Oct 02 10:01:39 imap(user at
example.com)<50643></2k4Sjp3vMqC496W>: Panic: file ostream-zlib.c:
line 37 (o_stream_zlib_close): assertion failed: (zstream->ostream.finished
|| zstream->ostream.ostream.stream_errno != 0 ||
zstream->ostream.error_handling_disabled)
> Oct 02 10:01:39 imap(user at
example.com)<50643></2k4Sjp3vMqC496W>: Error: Raw backtrace:
/usr/lib64/dovecot/libdovecot.so.0(+0xce56a) [0x7f442487556a] ->
/usr/lib64/dovecot/libdovecot.so.0(+0xce5b1) [0x7f44248755b1] ->
/usr/lib64/dovecot/libdovecot.so.0(+0x3d941) [0x7f44247e4941] ->
/usr/lib64/dovecot/lib20_zlib_plugin.so(+0x5cdf) [0x7f44233c4cdf] ->
/usr/lib64/dovecot/libdovecot.so.0(+0xf4b46) [0x7f442489bb46] ->
/usr/lib64/dovecot/libdovecot.so.0(o_stream_destroy+0x13) [0x7f442489be83] ->
/usr/lib64/dovecot/libdovecot-storage.so.0(maildir_save_finish+0x173)
[0x7f4424b93973] ->
/usr/lib64/dovecot/libdovecot-storage.so.0(mailbox_save_cancel+0x36)
[0x7f4424b68696] -> dovecot/imap [user at example.com X.X.X.X
APPEND](+0xede9) [0x55a9d7e86de9] -> dovecot/imap [user at example.com
X.X.X.X APPEND](command_exec+0x65) [0x55a9d7e956e5] -> dovecot/imap [user at
example.com X.X.X.X APPEND](+0xf9e6) [0x55a9d7e879e6] ->
/usr/lib64/dovecot/libdovecot.so.0(io_loop_call_io+0x55) [0x7f442488c275] ->
/usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0xbf)
[0x7f442488e13f] ->
/usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run+0x55) [0x7f442488c365]
-> /usr/lib64/dovecot/libdovecot.so.0(io_loop_run+0x38) [0x7f442488c588]
-> /usr/lib64/dovecot/libdovecot.so.0(master_service_run+0x13)
[0x7f4424808053] -> dovecot/imap [user at example.com X.X.X.X
APPEND](main+0x32d) [0x55a9d7ea20dd] ->
/lib64/libc.so.6(__libc_start_main+0x100) [0x7f4424431d20] -> dovecot/imap
[user at example.com X.X.X.X APPEND](+0xe419) [0x55a9d7e86419]
> 
> No clue how to reproduce
It crashes if client disconnects during APPEND, but only with Maildir and zlib
plugin. The bug already existed in earlier v2.3.x releases though.

Op 02/10/2018 om 11:26 schreef Tom Sommer:
> I see this in my logs after 2.3.3:
>
> using zlib plugin, ofc.
>
> Oct 02 10:01:39 imap(user at
example.com)<50643></2k4Sjp3vMqC496W>:
> Panic: file ostream-zlib.c: line 37 (o_stream_zlib_close): assertion 
> failed: (zstream->ostream.finished || 
> zstream->ostream.ostream.stream_errno != 0 || 
> zstream->ostream.error_handling_disabled)
> Oct 02 10:01:39 imap(user at
example.com)<50643></2k4Sjp3vMqC496W>:
> Error: Raw backtrace: /usr/lib64/dovecot/libdovecot.so.0(+0xce56a) 
> [0x7f442487556a] -> /usr/lib64/dovecot/libdovecot.so.0(+0xce5b1) 
> [0x7f44248755b1] -> /usr/lib64/dovecot/libdovecot.so.0(+0x3d941) 
> [0x7f44247e4941] -> /usr/lib64/dovecot/lib20_zlib_plugin.so(+0x5cdf) 
> [0x7f44233c4cdf] -> /usr/lib64/dovecot/libdovecot.so.0(+0xf4b46) 
> [0x7f442489bb46] -> 
> /usr/lib64/dovecot/libdovecot.so.0(o_stream_destroy+0x13) 
> [0x7f442489be83] -> 
> /usr/lib64/dovecot/libdovecot-storage.so.0(maildir_save_finish+0x173) 
> [0x7f4424b93973] -> 
> /usr/lib64/dovecot/libdovecot-storage.so.0(mailbox_save_cancel+0x36) 
> [0x7f4424b68696] -> dovecot/imap [user at example.com X.X.X.X 
> APPEND](+0xede9) [0x55a9d7e86de9] -> dovecot/imap [user at example.com 
> X.X.X.X APPEND](command_exec+0x65) [0x55a9d7e956e5] -> dovecot/imap 
> [user at example.com X.X.X.X APPEND](+0xf9e6) [0x55a9d7e879e6] -> 
> /usr/lib64/dovecot/libdovecot.so.0(io_loop_call_io+0x55) 
> [0x7f442488c275] -> 
> /usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0xbf) 
> [0x7f442488e13f] -> 
> /usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run+0x55) 
> [0x7f442488c365] -> 
> /usr/lib64/dovecot/libdovecot.so.0(io_loop_run+0x38) [0x7f442488c588] 
> -> /usr/lib64/dovecot/libdovecot.so.0(master_service_run+0x13) 
> [0x7f4424808053] -> dovecot/imap [user at example.com X.X.X.X 
> APPEND](main+0x32d) [0x55a9d7ea20dd] -> 
> /lib64/libc.so.6(__libc_start_main+0x100) [0x7f4424431d20] -> 
> dovecot/imap [user at example.com X.X.X.X APPEND](+0xe419) [0x55a9d7e86419]
>
> No clue how to reproduce
Fix is included in 2.3.5.

Regards,

Stephan.