Pop3 Panic Error

[Aki Tuomi]

> On 24/03/2022 09:32 Aki Tuomi <aki.tuomi at open-xchange.com> wrote:
> 
>  
> > On 24/03/2022 09:29 Aurel Mihai <mihai.aurel88 at gmail.com> wrote:
> > 
> > 
> > Hello,
> > after upgrade to version 2.3.18, we enconter a lot of errors, such as:
> > 
> > Mar 22 14:08:32 mail2 dovecot: pop3(user at domain)<52269><3y3GeM3aQ+tWadtM>: Panic: file lib-event.c: line 585 (event_reason_code_prefix): assertion failed: (name[0] != '\0')
> > Mar 22 14:08:32 mail2 dovecot: pop3(user at domain)<52269><3y3GeM3aQ+tWadtM>: Error: Raw backtrace: /usr/lib/dovecot/libdovecot.so.0(backtrace_append+0x42) [0x7f7ce322e012] -> 
> > /usr/lib/dovecot/libdovecot.so.0(backtrace_get+0x1e) [0x7f7ce322e12e] -> /usr/lib/dovecot/libdovecot.so.0(+0x101d4b) [0x7f7ce323ad4b] -> 
> > /usr/lib/dovecot/libdovecot.so.0(+0x101de1) [0x7f7ce323ade1] -> /usr/lib/dovecot/libdovecot.so.0(+0x55519) [0x7f7ce318e519] -> 
> > /usr/lib/dovecot/libdovecot.so.0(+0x594e2) [0x7f7ce31924e2] -> dovecot/pop3(client_handle_input+0x1c9) [0x55d5b5efa539] -> 
> > /usr/lib/dovecot/libdovecot.so.0(io_loop_call_io+0x69) [0x7f7ce3250f79] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0x96) [0x7f7ce3251066] -> 
> > /usr/lib/dovecot/libdovecot.so.0(io_loop_run+0x40) [0x7f7ce32511e0] -> /usr/lib/dovecot/libdovecot.so.0(master_service_run+0x13) [0x7f7ce31c4003] -> dovecot/pop3(main+0x2e6) [0x55d5b5ef81f6] -> 
> > /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xea) [0x7f7ce2f93d0a] -> dovecot/pop3(_start+0x2a) [0x55d5b5ef838a]
> > Mar 22 14:08:32 mail2 dovecot: pop3(user at domain)<52269><3y3GeM3aQ+tWadtM>: Fatal: master: service(pop3): child 52269 killed with signal 6 (core dumps disabled - https://dovecot.org/bugreport.html#coredumps)
> 
> 
> Hi!
> 
> Thanks for reporting this, we are looking into this issue.
> 
> Aki

This is a known issue with empty pop3 commands, and has been fixed with

https://github.com/dovecot/core/commit/1309137812424c80e63d3c1052795b43d6e19803.patch


Aki