>>>>> "Alexander" == Alexander Vogt via dovecot <dovecot@dovecot.org> writes:
Is this a new setup? Do you have SELinux enabled? Or are you doing
chroot'd setup? If so, back it all off one by one and see what's
going on. The fact that you can't dump core because you can't write
somewhere tells me that your systems is locked down really hard in
some manner.
The fd not supporting epoll() is also suspect to me. Can you give
more details on your system setup? Do you have apparmor turned on?
Have you looked in your system logs as well?
John
> dovecot auth service is failing when using an inet_service. The
> configuration is essentially:
> service auth {
> inet_listener {
> address = *
> port = 12345
> }
> unix_listener auth-userdb {
> group = vmail
> mode = 0666
> user = vmail
> }
> }
> When I connect to port 12345 (real IMAP client or telnet doesn't make a
> difference), the auth service crashes.
> Nov 19 22:21:54 imap.linexus.de dovecot[7195]: auth: Panic:
> epoll_ctl(add, 13) failed: Operation not permitted (fd doesn't support
> epoll)
> Nov 19 22:21:54 imap.linexus.de dovecot[7195]: auth: Error: Raw
> backtrace: /usr/lib64/dovecot/libdovecot.so.0(backtrace_append+0x46)
> [0x7f9319f89486] ->
> /usr/lib64/dovecot/libdovecot.so.0(backtrace_get+0x22) [0x7f9319f895a2]
-> /usr/lib64/dovecot/libdovecot.so.0(+0x10a41b) [0x7f9319f9841b] ->
> /usr/lib64/dovecot/libdovecot.so.0(+0x10a4b7) [0x7f9319f984b7] ->
> /usr/lib64/dovecot/libdovecot.so.0(+0x5d11a) [0x7f9319eeb11a] ->
> /usr/lib64/dovecot/libdovecot.so.0(+0x609b0) [0x7f9319eee9b0] ->
> /usr/lib64/dovecot/libdovecot.so.0(+0x1215ba) [0x7f9319faf5ba] ->
> /usr/lib64/dovecot/libdovecot.so.0(io_add_to+0x1d) [0x7f9319faf62d] ->
> /usr/lib64/dovecot/libdovecot.so.0(io_add+0x28) [0x7f9319faf668] ->
> /usr/lib64/dovecot/libdovecot.so.0(master_service_io_listeners_add+0x8a
> ) [0x7f9319f1d16a] ->
> /usr/lib64/dovecot/libdovecot.so.0(master_service_init_finish+0xff)
> [0x7f9319f24bdf] -> dovecot/auth(main+0x389) [0x55745603a4f9] ->
> /lib64/libc.so.6(+0x3feb0) [0x7f931963feb0] ->
> /lib64/libc.so.6(__libc_start_main+0x80) [0x7f931963ff60] ->
> dovecot/auth(_start+0x25) [0x55745603a715]
> System info (sysreport attached):
> # 2.3.16 (7e2e900c1a): /etc/dovecot/dovecot.conf
> # Pigeonhole version 0.5.16 (09c29328)
> # OS: Linux 5.14.0-383.el9.x86_64 x86_64 CentOS Stream release 9
> This exact configuration is known to work on this system:
> # 2.2.33.2 (d6601f4ec): /etc/dovecot/dovecot.conf
> # Pigeonhole version 0.4.21 (92477967)
> I tried for almost two hours to get a core dump for this, but finally
> gave up. I followed https://www.dovecot.org/bugreport-mail/#coredumps
> and other sources but the best I could get was
> Nov 19 22:21:54 imap.linexus.de dovecot[7195]: auth: Fatal: master:
> service(auth): child 7198 killed with signal 6 (core not dumped -
> https://dovecot.org/bugreport.html#coredumps - core wasn't writable?)
> for
> cat /proc/sys/kernel/core_pattern
> /tmp/core.%e.%p
> (which is 1777).
> Any help to get this resolved would be much appreciated!
> Thanks and best regards
> Alex
> [DELETED ATTACHMENT dovecot-sysreport-imap.linexus.de-1700427979.tar.gz,
> application/x-compressed-tar]
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