Created attachment 734198 [details] kcrash file Description of problem: Fresh istallation of PPC64 TC6.2 (http://ppc.koji.fedoraproject.org/stage/f19-20130410-TC6.2/ppc64/). Shortly after startup knotify4 crashes, without any user interaction. Version-Release number of selected component (if applicable): kde-runtime-4.10.1-3.fc19 How reproducible: Steps to Reproduce: 1. install PPc64 with KDE 2. start vncserver 3. connect to vncserver and wait for the crash reporting assistent to pop up Actual results: knotify4 segfaults
Not entirely sure, it's either something bad in orc: Thread 4 (Thread 0x3fff7bfef070 (LWP 8764)): [KCrash Handler] #6 0x00003fff8598076c in ?? () #7 0x00003fff84fa4084 in orc_audio_convert_unpack_float_s32 (d1=0x0, s1=0x4b800000050, n=1610670656) at tmp-orc.c:1154 #8 0x00003fff7bfedd50 in ?? () Backtrace stopped: previous frame inner to this frame (corrupt stack?) or gstreamer-related: Thread 1 (Thread 0x3fff8fc31cc0 (LWP 8075)): #0 0x00000080eb545468 in __lll_lock_wait (futex=0x100397c4530, private=<optimized out>) at ../nptl/sysdeps/unix/sysv/linux/lowlevellock.c:46 #1 0x00000080eb53ea80 in __GI___pthread_mutex_lock (mutex=<optimized out>) at pthread_mutex_lock.c:85 #2 0x00000080eb936244 in g_rec_mutex_lock (mutex=<optimized out>) at gthread-posix.c:379 #3 0x00000080eb89825c in g_static_rec_mutex_lock (mutex=0x1003938c800) at deprecated/gthread-deprecated.c:716 #4 0x00000080f01bb3dc in gst_base_transform_activate (trans=trans@entry=0x1003973c030, active=active@entry=0) at gstbasetransform.c:2767
Or, after looking at bug #951109 , I see that these both died in the same lll_futex_wait function. Here, Application: KNotify (knotify4), signal: Segmentation fault Using host libthread_db library "/lib64/libthread_db.so.1". 46 lll_futex_wait (futex, 2, private); [Current thread is 1 (Thread 0x3fff8fc31cc0 (LWP 8075))]
When looking at a crash of a multithreaded program, the first thing to do is to identify the active thread, usually the only relevant one. Any thread stuck in something like lll_futex_wait, __lll_lock_wait etc. is NOT active. The issue looks like an ORC bug. ORC (OIL (Optimized Inner Loops) Runtime Compiler) is a JIT for inner loops used by GStreamer. Reassigning to orc.
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Fedora 19 changed to end-of-life (EOL) status on 2015-01-06. Fedora 19 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. If you are unable to reopen this bug, please file a new report against the current release. If you experience problems, please add a comment to this bug. Thank you for reporting this bug and we are sorry it could not be fixed.