[kdelibs] [Bug 305654] Crash in KSharedDataCache::Private::mapSharedMemory

[Andrew Crouthamel]

https://bugs.kde.org/show_bug.cgi?id=305654

Andrew Crouthamel  changed:

   What|Removed |Added

 CC||andrew.crouthamel@kdemail.n
   ||et
 Resolution|WAITINGFORINFO  |WORKSFORME
 Status|NEEDSINFO   |RESOLVED

--- Comment #28 from Andrew Crouthamel  ---
Per reporter via email:

Sorry, I can't re-test it.
I don't remember for what hardware it was.
And as it was so long, and no fresh reports - than it can closed.

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[kdelibs] [Bug 305654] Crash in KSharedDataCache::Private::mapSharedMemory

[Andrew Crouthamel]

https://bugs.kde.org/show_bug.cgi?id=305654

Andrew Crouthamel  changed:

   What|Removed |Added

 Status|REPORTED|NEEDSINFO
 Resolution|--- |WAITINGFORINFO

--- Comment #27 from Andrew Crouthamel  ---
Dear Bug Submitter,

This bug has been stagnant for a long time. Could you help us out and re-test
if the bug is valid in the latest version? I am setting the status to NEEDSINFO
pending your response, please change the Status back to REPORTED when you
respond.

Thank you for helping us make KDE software even better for everyone!

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[kdelibs] [Bug 305654] Crash in KSharedDataCache::Private::mapSharedMemory

[Michael Pyne via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=305654

--- Comment #26 from Michael Pyne  ---
This might be the right bug ticket (the backtrace is at least similar), but
have you checked whether some of the workarounds mentioned in previous comments
work?

At the very least, is the hard disk that hosts the /var directory nearly full?
If so, you'll need to free up enough space if you're using a file system that
doesn't support the posix_fallocate() system call that KSharedDataCache uses to
try to avoid this crash.

Have you been using Bleachbit? If so, stop (or at least configure it to stop
trying to shred important system files like the various caches used by
Plasma...).

Finally, you may want to remove any existing KSharedDataCache caches (*.kcache
files, either under "$HOME/.cache" or /var/tmp/kdecache-$USER or wherever else
your system is configured to store cached data). Removing the cache (without
editing its contents in the process) is always safe to do even if the system is
running. If SDDM works normally after this, then it *is* a bug but at least
you'll have a workaround.

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[kdelibs] [Bug 305654] Crash in KSharedDataCache::Private::mapSharedMemory

[Märt Bakhoff via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=305654

Märt Bakhoff  changed:

   What|Removed |Added

 CC||spam3910...@gmail.com

--- Comment #25 from Märt Bakhoff  ---
SDDM greeter started crashing on startup after upgrading to
plasma-framework-5.19 on arch linux x86_64. Qt version 5.5.1, SDDM 0.13 with
breeze theme. Reproduces every time. Downgrading to plasma-framework 5.18
helps. Is this the right bug or should I create a new one? 

Core was generated by `/usr/bin/sddm-greeter --socket /tmp/sddm-:0-VmMDWH
--theme /usr/share/sddm/them'.
Program terminated with signal SIGBUS, Bus error.
#0  0x7f3a10faa4be in QBasicAtomicOps<4>::testAndSetRelaxed
(newValue=1, expectedValue=0, 
_q_value=@0x7f3a048b3000: ) at
/usr/include/qt/QtCore/qatomic_x86.h:232
232  : "memory");
[Current thread is 1 (Thread 0x7f3a274a77c0 (LWP 11680))]
(gdb) bt
#0  0x7f3a10faa4be in QBasicAtomicOps<4>::testAndSetRelaxed
(newValue=1, expectedValue=0, 
_q_value=@0x7f3a048b3000: ) at
/usr/include/qt/QtCore/qatomic_x86.h:232
#1  QGenericAtomicOps >::testAndSetAcquire
(newValue=1, expectedValue=0, 
_q_value=@0x7f3a048b3000: ) at
/usr/include/qt/QtCore/qgenericatomic.h:144
#2  QBasicAtomicInteger::testAndSetAcquire (newValue=1, expectedValue=0,
this=0x7f3a048b3000) at /usr/include/qt/QtCore/qbasicatomic.h:138
#3  KSharedDataCache::Private::mapSharedMemory (this=this@entry=0xd52660)
at
/tmp/kcoreaddons/src/kcoreaddons-5.19.0/src/lib/caching/kshareddatacache.cpp:1144
#4  0x7f3a10fa488a in KSharedDataCache::Private::Private
(expectedItemSize=0, defaultCacheSize=16777216, name=..., this=0xd52660)
at
/tmp/kcoreaddons/src/kcoreaddons-5.19.0/src/lib/caching/kshareddatacache.cpp:987
#5  KSharedDataCache::KSharedDataCache (this=0xc05e60, cacheName=...,
defaultCacheSize=16777216, expectedItemSize=0)
at
/tmp/kcoreaddons/src/kcoreaddons-5.19.0/src/lib/caching/kshareddatacache.cpp:1383
#6  0x7f3a11b75058 in
KSharedPixmapCacheMixin::KSharedPixmapCacheMixin
(expectedItemSize=0, defaultCacheSize=16777216, 
cacheName=..., this=0xc05e50) at
/usr/include/KF5/KGuiAddons/kimagecache.h:89

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