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Message #138945
[Bug 1433320] Re: systemd-journald, udev, logind crashed with SIGABRT -- get killed by 1 min watchdog timeout on longer kernel lockups
This bug was fixed in the package apport - 2.19-0ubuntu1
---------------
apport (2.19-0ubuntu1) wily; urgency=medium
* New upstream release:
- apport: Drop re-nicing. This might decrease the time a user has to wait
for apport to finish the core dump for a crashed/hanging foreground
process. (See LP #1278780)
- kernel_crashdump: Enforce that the log/dmesg files are not a symlink.
This prevents normal users from pre-creating a symlink to the
predictable .crash file, and thus triggering a "fill up disk" DoS attack
when the .crash report tries to include itself. Thanks to halfdog for
discovering this! (CVE-2015-1338, part of LP #1492570)
- SECURITY FIX: Fix all writers of report files (package_hook,
kernel_crashdump, and similar) to open the report file exclusively,
i. e. fail if they already exist. This prevents privilege escalation
through symlink attacks. Note that this will also prevent overwriting
previous reports with the same same. Thanks to halfdog for discovering
this! (CVE-2015-1338, LP: #1492570)
- apport: Ignore process restarts from systemd's watchdog. Their traces
are usually useless as they don't have any information about the actual
reasaon why processes hang (like VM suspends or kernel lockups with bad
hardware) (LP: #1433320)
-- Martin Pitt <martin.pitt@xxxxxxxxxx> Thu, 24 Sep 2015 14:41:54
+0200
** Changed in: apport (Ubuntu)
Status: Fix Committed => Fix Released
** CVE added: http://www.cve.mitre.org/cgi-
bin/cvename.cgi?name=2015-1338
--
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https://bugs.launchpad.net/bugs/1433320
Title:
systemd-journald, udev, logind crashed with SIGABRT -- get killed by 1
min watchdog timeout on longer kernel lockups
Status in apport package in Ubuntu:
Fix Released
Status in systemd package in Ubuntu:
Won't Fix
Bug description:
Errors Bucket
-------------
https://errors.ubuntu.com/bucket/?id=/lib/systemd/systemd-journald%3A6%3A__epoll_wait_nocancel%3Asd_event_wait%3Asd_event_run%3Amain
Sometimes userspace get locked up hard: A QEMU instance sees long hangs while the host gets suspended, USB devices/drivers lock up for some time (like in this bug's dmesg), or Google hangouts in bug 1495585.
The kernel detects that some process(es) get hard-locked up, the hardware watchdog (which systemd configures for some crucial services to auto-restart them via "WatchdogSec=1min") picks this up and restarts the process.
In that case, these crash reports only describe the symptom, not the
cause. They should be suppressed since they provide no information
that can be used to diagnose the actual root problem.
ProblemType: CrashDistroRelease: Ubuntu 15.04
Package: systemd 219-4ubuntu5 [modified: usr/share/dbus-1/system-services/org.freedesktop.systemd1.service]
ProcVersionSignature: Ubuntu 3.19.0-8.8-generic 3.19.1
Uname: Linux 3.19.0-8-generic x86_64
ApportVersion: 2.16.2-0ubuntu3
Architecture: amd64
Date: Tue Mar 17 17:18:08 2015
ExecutablePath: /lib/systemd/systemd-journald
InstallationDate: Installed on 2014-02-24 (386 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
Lsusb:
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 003: ID 0e0f:0002 VMware, Inc. Virtual USB Hub
Bus 002 Device 002: ID 0e0f:0003 VMware, Inc. Virtual Mouse
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
MachineType: VMware, Inc. VMware Virtual Platform
ProcCmdline: /lib/systemd/systemd-journald
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-8-generic root=UUID=7f776823-8240-460b-ab2d-45c8a2b2f2b6 ro quiet splash
Signal: 6SourcePackage: systemd
StacktraceTop:
__epoll_wait_nocancel () at ../sysdeps/unix/syscall-template.S:81
?? ()
?? ()
__libc_start_main (main=0x7f94ef54c760, argc=1, argv=0x7ffe7c6e2fa8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffe7c6e2f98) at libc-start.c:287
?? ()
Title: systemd-journald crashed with SIGABRT in __epoll_wait_nocancel()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:
dmi.bios.date: 05/20/2014
dmi.bios.vendor: Phoenix Technologies LTD
dmi.bios.version: 6.00
dmi.board.name: 440BX Desktop Reference Platform
dmi.board.vendor: Intel Corporation
dmi.board.version: None
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 1
dmi.chassis.vendor: No Enclosure
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvr6.00:bd05/20/2014:svnVMware,Inc.:pnVMwareVirtualPlatform:pvrNone:rvnIntelCorporation:rn440BXDesktopReferencePlatform:rvrNone:cvnNoEnclosure:ct1:cvrN/A:
dmi.product.name: VMware Virtual Platform
dmi.product.version: None
dmi.sys.vendor: VMware, Inc.
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