Bug 831132 - systemd journal leaks all logs into memory
systemd journal leaks all logs into memory
Product: Fedora
Classification: Fedora
Component: systemd (Show other bugs)
All All
unspecified Severity high
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Assigned To: systemd-maint
Fedora Extras Quality Assurance
Depends On:
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Reported: 2012-06-12 05:33 EDT by Artur Zaprzała
Modified: 2012-06-20 15:25 EDT (History)
8 users (show)

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Doc Type: Bug Fix
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Last Closed: 2012-06-20 15:25:12 EDT
Type: Bug
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Description Artur Zaprzała 2012-06-12 05:33:21 EDT
Description of problem:
systemd-journald does not munmap log files after rotation. By default this log files are stored in /run/log/journal, which is a tmpfs filesystem, so old log files, though deleted, still occupy memory.

Fortunately it crashed before eating all memory:
Jun 11 16:46:26 myhost kernel: [150734.343131] systemd-journal[310]: segfault at 8 ip 00000000004061c2 sp 00007fff655d45a0 error 4 in systemd-journald[400000+1f000]
Jun 11 16:46:27 myhost systemd[1]: systemd-journald.service: main process exited, code=killed, status=11

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
Run a service that generates lots of syslog. Wait until journal logs are rotated.

Actual results:
/run file system and memory is filling up indefinitely. systemd-journald has all rotated log files mapped into memory:
lsof -c systemd-journal | grep /run/log/journal

Expected results:
By default systemd-journald should use no more than 10% of /run filesystem.
Only /run/log/journal/*/system.journal should be mapped into memory.
Comment 1 Artur Zaprzała 2012-06-12 05:52:07 EDT
systemd-journald crashed when no space left on /run filesystem.
Comment 2 Michal Schmidt 2012-06-12 07:09:33 EDT
I can reproduce the leaks in Rawhide.
Comment 3 Michal Schmidt 2012-06-12 07:15:49 EDT
I think it's f->header that's leaked.
Comment 5 Fedora Update System 2012-06-12 20:15:07 EDT
systemd-44-13.fc17 has been submitted as an update for Fedora 17.
Comment 6 Artur Zaprzała 2012-06-13 07:53:15 EDT
There are no leaks with systemd-44-13. Thanks.
Comment 7 Fedora Update System 2012-06-15 08:28:01 EDT
Package systemd-44-14.fc17:
* should fix your issue,
* was pushed to the Fedora 17 testing repository,
* should be available at your local mirror within two days.
Update it with:
# su -c 'yum update --enablerepo=updates-testing systemd-44-14.fc17'
as soon as you are able to.
Please go to the following url:
then log in and leave karma (feedback).
Comment 8 Fedora Update System 2012-06-20 15:25:12 EDT
systemd-44-14.fc17 has been pushed to the Fedora 17 stable repository.  If problems still persist, please make note of it in this bug report.

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