Mythbuntu

mythbackend crashed with SIGSEGV in QString::append().

Bug #1624599 reported by Jon on 2016-09-17

This bug affects 4 people

Affects		Status	Importance	Assigned to	Milestone
	Mythbuntu	New	Undecided	Unassigned

Bug Description

Crash occurs at least once every couple days. Tuned to single channel on test box kodi front end accessing mythtvbackend. Same box. additional logs available if required. Will start tune to single channel now in attempt to reproduce within couple days time.

ProblemType: Crash
DistroRelease: Ubuntu 16.04
Package: mythtv-backend 2:0.28.0+fixes.20160910.e6a60f7-0ubuntu0mythbuntu2 [origin: LP-PPA-mythbuntu-0.28]
ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16
Uname: Linux 4.4.0-36-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_modeset nvidia
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CrashCounter: 1
CrashDB: mythbuntu
Date: Fri Sep 16 19:00:04 2016
ExecutablePath: /usr/bin/mythbackend
InstallationDate: Installed on 2016-08-12 (35 days ago)
InstallationMedia: Ubuntu-Server 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
Installed_mythtv_dbg: 2:0.28.0+fixes.20160910.e6a60f7-0ubuntu0mythbuntu2
ProcCmdline: /usr/bin/mythbackend --quiet --syslog local7
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/bin/sh
SegvAnalysis:
Segfault happened at: 0x7f5a5737ee10 <__memcpy_sse2_unaligned+32>: movdqu (%rsi),%xmm8
PC (0x7f5a5737ee10) ok
source "(%rsi)" (0xfeb430137c58) not located in a known VMA region (needed readable region)!
destination "%xmm8" ok
Stack memory exhausted (SP below stack segment)
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: mythtv
StacktraceTop:
QString::append(QString const&) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
QtPrivate::QStringList_join(QStringList const*, QChar const*, int) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
QListSpecialMethods<QString>::join (this=0x7f597f7fcbd0, sep=...) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qstringlist.h:192
MythSocket::WriteStringListReal (this=0x11794b0, list=0x7f597f7fcbd0, ret=0x7f597f7fc99f) at mythsocket.cpp:758
MythSocket::qt_static_metacall (_o=0x11794b0, _c=QMetaObject::InvokeMetaMethod, _id=8, _a=0x7f597f7fc330) at moc_mythsocket.cpp:148
Title: mythbackend crashed with SIGSEGV in QString::append()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: audio cdrom dialout video

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Revision history for this message

Jon (helodog76) wrote on 2016-09-17:

.var.log.mythtv.mythbackend.log.txt Edit (3.4 MiB, text/plain; charset="utf-8")
.var.log.mythtv.mythcommflag.log.txt Edit (378.9 KiB, text/plain; charset="utf-8")
.var.log.mythtv.mythfilldatabase.log.txt Edit (387.4 KiB, text/plain; charset="utf-8")
.var.log.mythtv.mythmetadatalookup.log.txt Edit (425.1 KiB, text/plain; charset="utf-8")
.var.log.mythtv.mythpreviewgen.log.txt Edit (3.7 MiB, text/plain; charset="utf-8")
.var.log.mythtv.mythtv-setup.log.txt Edit (37.0 KiB, text/plain; charset="utf-8")
CoreDump.gz Edit (15.1 MiB, application/x-gzip)
Dependencies.txt Edit (15.9 KiB, text/plain; charset="utf-8")
Disassembly.txt Edit (1.2 KiB, text/plain; charset="utf-8")
JournalErrors.txt Edit (51.6 KiB, text/plain; charset="utf-8")
MythTVDirectoryPermissions.txt Edit (603 bytes, text/plain; charset="utf-8")
ProcMaps.txt Edit (73.6 KiB, text/plain; charset="utf-8")
ProcStatus.txt Edit (939 bytes, text/plain; charset="utf-8")
Registers.txt Edit (845 bytes, text/plain; charset="utf-8")
Stacktrace.txt Edit (3.8 KiB, text/plain; charset="utf-8")
ThreadStacktrace.txt Edit (146.3 KiB, text/plain; charset="utf-8")

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