Description of problem:
occurs under heavy system load

Version-Release number of selected component:
systemd-219-9.fc22

Additional info:
reporter:       libreport-2.4.0
backtrace_rating: 4
cmdline:        /usr/lib/systemd/systemd-journald
crash_function: journal_file_append_object
executable:     /usr/lib/systemd/systemd-journald
kernel:         4.0.0-0.rc3.git0.1.fc22.i686+PAE
runlevel:       N 5
type:           CCpp
uid:            0

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 journal_file_append_object at ../src/journal/journal-file.c:589
 #1 journal_file_append_entry_internal.constprop.109 at ../src/journal/journal-file.c:1328
 #2 journal_file_append_entry.constprop.103 at ../src/journal/journal-file.c:1427
 #3 write_to_journal at ../src/journal/journald-server.c:512
 #4 dispatch_message_real.lto_priv.227 at ../src/journal/journald-server.c:819
 #5 server_dispatch_message at ../src/journal/journald-server.c:917
 #6 dev_kmsg_record at ../src/journal/journald-kmsg.c:306
 #7 server_read_dev_kmsg.lto_priv.241 at ../src/journal/journald-kmsg.c:348
 #8 source_dispatch at ../src/libsystemd/sd-event/sd-event.c:2115
 #9 sd_event_dispatch at ../src/libsystemd/sd-event/sd-event.c:2472