Hi

Since a recent DNF update, I see many log file entries like the following:

Apr 08 16:16:36 udoo.symmetrix.ch audit[31074]: ANOM_ABEND auid=4294967295 uid=0 gid=0 ses=4294967295 subj=system_u:system_r:dovecot_auth_t:s0 pid=31074 comm="auth" exe="/usr/libexec/dovecot/auth" sig=11 res=1
Apr 08 16:16:36 udoo.symmetrix.ch kernel: traps: auth[31074] general protection fault ip:7ff45b5f98a7 sp:7fff0df96830 error:0 in libmariadb.so.3[7ff45b5d7000+46000]
Apr 08 16:16:36 udoo.symmetrix.ch dovecot[30008]: auth-worker: Fatal: master: service(auth-worker): child 31074 killed with signal 11 (core not dumped - https://dovecot.org/bugreport.html#coredumps)
Apr 08 16:16:38 udoo.symmetrix.ch abrt-dump-journal-oops[1139]: abrt-dump-journal-oops: Found oopses: 1
Apr 08 16:16:38 udoo.symmetrix.ch abrt-dump-journal-oops[1139]: abrt-dump-journal-oops: Creating problem directories
Apr 08 16:16:39 udoo.symmetrix.ch abrt-dump-journal-oops[1139]: Reported 1 kernel oopses to Abrt
Apr 08 16:16:39 udoo.symmetrix.ch abrt-server[31104]: Can't find a meaningful backtrace for hashing in '.'
Apr 08 16:16:39 udoo.symmetrix.ch abrt-server[31104]: Option 'DropNotReportableOopses' is not configured
Apr 08 16:16:39 udoo.symmetrix.ch abrt-server[31104]: Preserving oops '.' because DropNotReportableOopses is 'no'
Apr 08 16:16:39 udoo.symmetrix.ch dbus-daemon[1022]: [system] Activating service name='org.freedesktop.problems' requested by ':1.779' (uid=0 pid=31122 comm="/usr/bin/python3 /usr/bin/abrt-action-notify -d /v" label="system_u:system_r:abrt_t:s0-s0:c0.c1023") (using servicehelper)
Apr 08 16:16:40 udoo.symmetrix.ch dbus-daemon[1022]: [system] Successfully activated service 'org.freedesktop.problems'
Apr 08 16:16:40 udoo.symmetrix.ch abrt-notification[31129]: System encountered a non-fatal error in ??()


# uname -a
Linux udoo.symmetrix.ch 5.0.5-100.fc28.x86_64 #1 SMP Wed Mar 27 22:16:29 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

# dovecot --version
2.3.5 (513208660)

# mysql --version
mysql  Ver 15.1 Distrib 10.2.22-MariaDB, for Linux (x86_64) using readline 5.1

Unfortunately I didn't manage to get a core dump, sorry.

Kind regards,
Herbert

Herbert

it's just a guess without a backtrace, but it looks similar to an already known issue of a double mysql_close. The code has not yet in a release but it's in the master-2.3 branch. If you are building from source you might be able to patch it yourself while waiting for the next 2.3.x release.

https://github.com/dovecot/core/commit/8d78721bbf86657966750da3bcfc7fe9a92c7417

John