RESOLVED FIXED264524
[GStreamer][MSE] Crash in _gst_element_request_pad 
https://bugs.webkit.org/show_bug.cgi?id=264524
Summary [GStreamer][MSE] Crash in _gst_element_request_pad
Michael Catanzaro
Reported 2023-11-09 15:06:07 PST
Created attachment 468543 [details] Backtrace Using Epiphany Tech Preview with WebKitGTK 2.42.1 and GStreamer 1.22.5, my web process crashed when visiting https://apnews.com/article/donald-trump-letitia-james-fraud-trial-arthur-engoron-new-york-9b8ac3f485607b5aa95f35ab724efcd4 The crash is deep in GStreamer: (gdb) bt #0 g_type_check_instance_is_fundamentally_a (type_instance=type_instance@entry=0x7f1d640ad5c0, fundamental_type=fundamental_type@entry=0x50 [GObject]) at ../gobject/gtype.c:4153 #1 0x00007f1ffb56583a in g_object_ref (_object=_object@entry=0x7f1d640ad5c0) at ../gobject/gobject.c:3715 #2 0x00007f1ffba6f2bf in gst_object_ref (object=0x7f1d640ad5c0) at ../gst/gstobject.c:240 #3 0x00007f1ffba99121 in _gst_element_request_pad (element=0x556f02df8820 [GstStreamSynchronizer|streamsynchronizer0], templ=0x556f02df7a90 [GstPadTemplate|sink_%u], name=<optimized out>, caps=caps@entry=0x0) at ../gst/gstelement.c:1182 #4 0x00007f1ffba992bf in gst_element_request_pad_simple (element=<optimized out>, name=name@entry=0x7f1f7a4a3668 "sink_%u") at ../gst/gstelement.c:1274 #5 0x00007f1f7a49c783 in gst_play_sink_do_reconfigure.isra.0 (playsink=playsink@entry=0x556f02df8200 [GstPlaySink|playsink]) at ../gst/playback/gstplaysink.c:3623 #6 0x00007f1f7a48563e in sinkpad_blocked_cb (blockedpad=blockedpad@entry=0x556f02f562a0 [GstProxyPad|proxypad17], info=info@entry=0x7f1daf7fc7c0, user_data=0x556f02df8200) at ../gst/playback/gstplaysink.c:4450 #7 0x00007f1ffbac053f in probe_hook_marshal (hook=0x556f02ed5250, data=0x7f1daf7fc680) at ../gst/gstpad.c:3669 #8 0x00007f1ffad07f07 in g_hook_list_marshal (hook_list=hook_list@entry=0x556f02f56338, may_recurse=may_recurse@entry=1, marshaller=marshaller@entry=0x7f1ffbac0260 <probe_hook_marshal>, data=data@entry=0x7f1daf7fc680) at ../glib/ghook.c:674 #9 0x00007f1ffbac0bc8 in do_probe_callbacks (pad=pad@entry=0x556f02f562a0 [GstProxyPad|proxypad17], info=info@entry=0x7f1daf7fc7c0, defaultval=defaultval@entry=GST_FLOW_OK) at ../gst/gstpad.c:3853 #10 0x00007f1ffbac521a in gst_pad_push_event_unchecked (pad=pad@entry=0x556f02f562a0 [GstProxyPad|proxypad17], event=0x7f1d74003e10 [GstEvent], type=type@entry=GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM) at ../gst/gstpad.c:5521 I've attached a file containing a full backtrace of the crash thread, plus short backtraces of every thread.
Attachments
Backtrace (168.39 KB, text/plain)
2023-11-09 15:06 PST, Michael Catanzaro 		no flags
Details
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Philippe Normand
Comment 1 2023-11-11 05:47:35 PST
Here I get this: (WebKitWebProcess:46): GStreamer-WARNING **: 05:47:05.580: ../gst/gstpad.c:5366:store_sticky_event:<avdec_h264-0:sink> Sticky event misordering, got 'caps' before 'stream-start' Player spins, playback won't start. So yes, something wrong...
Philippe Normand
Comment 2 2024-12-08 09:41:05 PST
This plays fine in TP now. Closing.
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