[Bug 797075] New: hls segfaults

GStreamer (GNOME Bugzilla) bugzilla at gnome.org
Tue Sep 4 20:50:33 UTC 2018 

https://bugzilla.gnome.org/show_bug.cgi?id=797075

            Bug ID: 797075
           Summary: hls segfaults
    Classification: Platform
           Product: GStreamer
           Version: git master
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gst-plugins-bad
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: lists at svrinformatica.it
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

I see some crashs using playbin for an hls stream

- crash 1:

#0  0x00007fffef3cca26 in malloc () at /usr/lib/libc.so.6
#1  0x00007fffef453b0f in __vasprintf_chk () at /usr/lib/libc.so.6
#2  0x00007ffff7c54c5a in g_vasprintf () at /usr/lib/libglib-2.0.so.0
#3  0x00007ffff7c2e0de in g_strdup_vprintf () at /usr/lib/libglib-2.0.so.0
#4  0x00007ffff7c2e19a in g_strdup_printf () at /usr/lib/libglib-2.0.so.0
#5  0x00007fff657d504e in uri_join (uri1=<optimized out>, uri2=0x7ffed0017015
"3304.ts")
    at ../subprojects/gst-plugins-bad/ext/hls/m3u8.c:1111
#6  0x00007fff657d583d in gst_m3u8_update (self=0x7ffed0016db0, data=<optimized
out>)
    at ../subprojects/gst-plugins-bad/ext/hls/m3u8.c:522
#7  0x00007fff657cf5c9 in gst_hls_demux_update_playlist
(demux=demux at entry=0x7ffef00ceec0, update=update at entry=1, err=err at entry=0x0) at
../subprojects/gst-plugins-bad/ext/hls/gsthlsdemux.c:1459
#8  0x00007fff657cfcdf in gst_hls_demux_change_playlist
(demux=demux at entry=0x7ffef00ceec0, max_bitrate=<optimized out>,
changed=changed at entry=0x7ffee67fb2e4) at
../subprojects/gst-plugins-bad/ext/hls/gsthlsdemux.c:1599
#9  0x00007fff657d0edd in gst_hls_demux_select_bitrate (stream=<optimized out>,
bitrate=<optimized out>)
    at ../subprojects/gst-plugins-bad/ext/hls/gsthlsdemux.c:1149
#10 0x00007fff657c0c99 in gst_adaptive_demux_stream_select_bitrate
(bitrate=<optimized out>, stream=0x7fff1412d830, demux=0x7ffef00ceec0) at
../subprojects/gst-plugins-bad/gst-libs/gst/adaptivedemux/gstadaptivedemux.c:4280
#11 0x00007fff657c0c99 in gst_adaptive_demux_stream_advance_fragment_unlocked
(duration=<optimized out>, stream=0x7fff1412d830, demux=0x7ffef00ceec0) at
../subprojects/gst-plugins-bad/gst-libs/gst/adaptivedemux/gstadaptivedemux.c:4232
#12 0x00007fff657c0c99 in gst_adaptive_demux_stream_advance_fragment
(demux=demux at entry=0x7ffef00ceec0, stream=stream at entry=0x7fff1412d830,
duration=<optimized out>) at
../subprojects/gst-plugins-bad/gst-libs/gst/adaptivedemux/gstadaptivedemux.c:4153
#13 0x00007fff657ce726 in gst_hls_demux_finish_fragment (demux=0x7ffef00ceec0,
stream=0x7fff1412d830)
    at ../subprojects/gst-plugins-bad/ext/hls/gsthlsdemux.c:953
#14 0x00007fff657b477f in gst_adaptive_demux_eos_handling
(stream=stream at entry=0x7fff1412d830)
    at
../subprojects/gst-plugins-bad/gst-libs/gst/adaptivedemux/gstadaptivedemux.c:2730
#15 0x00007fff657b4af9 in _src_event (pad=<optimized out>, parent=<optimized
out>, event=0x7ffed4003d10)
    at
../subprojects/gst-plugins-bad/gst-libs/gst/adaptivedemux/gstadaptivedemux.c:2748
#16 0x00007ffff7dee277 in gst_pad_send_event_unchecked
(pad=pad at entry=0x7fff1412acd0, event=event at entry=0x7ffed4003d10,
type=<optimized out>, type at entry=GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM) at
../subprojects/gstreamer/gst/gstpad.c:5757
#17 0x00007ffff7dee7c4 in gst_pad_push_event_unchecked
(pad=pad at entry=0x7fff1404f5b0, event=0x7ffed4003d10,
type=type at entry=GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM) at
../subprojects/gstreamer/gst/gstpad.c:5402
#18 0x00007ffff7deec34 in push_sticky (pad=pad at entry=0x7fff1404f5b0,
ev=ev at entry=0x7ffee67fb600, user_data=user_data at entry=0x7---Type <return> to
continue, or q <return> to quit---
ffee67fb670) at ../subprojects/gstreamer/gst/gstevent.h:438
#19 0x00007ffff7dec548 in events_foreach (pad=pad at entry=0x7fff1404f5b0,
func=func at entry=0x7ffff7deebe0 <push_sticky>,
user_data=user_data at entry=0x7ffee67fb670) at
../subprojects/gstreamer/gst/gstpad.c:608
#20 0x00007ffff7df7b71 in check_sticky (event=0x7ffed4003d10,
pad=0x7fff1404f5b0)
    at ../subprojects/gstreamer/gst/gstpad.c:3977
#21 0x00007ffff7df7b71 in gst_pad_push_event (pad=pad at entry=0x7fff1404f5b0,
event=0x7ffed4003d10)
    at ../subprojects/gstreamer/gst/gstpad.c:5533
#22 0x00007ffff7df80f4 in event_forward_func (pad=pad at entry=0x7fff1404f5b0,
data=data at entry=0x7ffee67fb770)
    at ../subprojects/gstreamer/gst/gstevent.h:438
#23 0x00007ffff7df446e in gst_pad_forward (pad=pad at entry=0x555556151d00,
forward=forward at entry=0x7ffff7df8030 <event_forward_func>,
user_data=user_data at entry=0x7ffee67fb770) at
../subprojects/gstreamer/gst/gstpad.c:3004
#24 0x00007ffff7df45b5 in gst_pad_event_default (pad=0x555556151d00,
parent=<optimized out>, event=0x7ffed4003d10)
    at ../subprojects/gstreamer/gst/gstpad.c:3101
#25 0x00007ffff7dee277 in gst_pad_send_event_unchecked
(pad=pad at entry=0x555556151d00, event=event at entry=0x7ffed4003d10,
type=<optimized out>, type at entry=GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM) at
../subprojects/gstreamer/gst/gstpad.c:5757
#26 0x00007ffff7dee7c4 in gst_pad_push_event_unchecked
(pad=pad at entry=0x7fff1412a830, event=0x7ffed4003d10,
type=type at entry=GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM) at
../subprojects/gstreamer/gst/gstpad.c:5402
#27 0x00007ffff7deec34 in push_sticky (pad=pad at entry=0x7fff1412a830,
ev=ev at entry=0x7ffee67fb970, user_data=user_data at entry=0x7ffee67fb9e0) at
../subprojects/gstreamer/gst/gstevent.h:438
#28 0x00007ffff7dec548 in events_foreach (pad=pad at entry=0x7fff1412a830,
func=func at entry=0x7ffff7deebe0 <push_sticky>,
user_data=user_data at entry=0x7ffee67fb9e0) at
../subprojects/gstreamer/gst/gstpad.c:608
#29 0x00007ffff7df7b71 in check_sticky (event=0x7ffed4003d10,
pad=0x7fff1412a830)
    at ../subprojects/gstreamer/gst/gstpad.c:3977
#30 0x00007ffff7df7b71 in gst_pad_push_event (pad=0x7fff1412a830,
event=event at entry=0x7ffed4003d10)
    at ../subprojects/gstreamer/gst/gstpad.c:5533
#31 0x00007fff8806626b in gst_queue_push_one (queue=0x7ffee0016010)
    at ../subprojects/gstreamer/plugins/elements/gstqueue.c:1455
#32 0x00007fff8806626b in gst_queue_loop (pad=<optimized out>) at
../subprojects/gstreamer/plugins/elements/gstqueue.c:1537
#33 0x00007ffff7e24751 in gst_task_func (task=0x7fff1404c710) at
../subprojects/gstreamer/gst/gsttask.c:328
#34 0x00007ffff7c37bf6 in  () at /usr/lib/libglib-2.0.so.0
#35 0x00007ffff7c371ea in  () at /usr/lib/libglib-2.0.so.0
#36 0x00007fffef840a9d in start_thread () at /usr/lib/libpthread.so.0


crash 2:

#0  0x00007fffef4a6667 in __strlen_avx2 () at /usr/lib/libc.so.6
#1  0x00007ffff7c2df54 in g_strdup () at /usr/lib/libglib-2.0.so.0
#2  0x00007fff7d7cff10 in gst_hls_demux_update_fragment_info
(stream=0x7ffed000e420)
    at ../subprojects/gst-plugins-bad/ext/hls/gsthlsdemux.c:1102
#3  0x00007fff7d7b3ba1 in gst_adaptive_demux_stream_update_fragment_info
(demux=demux at entry=0x7fff141aa1f0, stream=stream at entry=0x7ffed000e420) at
../subprojects/gst-plugins-bad/gst-libs/gst/adaptivedemux/gstadaptivedemux.c:4303
#4  0x00007fff7d7bde74 in gst_adaptive_demux_stream_download_loop
(stream=0x7ffed000e420)
    at
../subprojects/gst-plugins-bad/gst-libs/gst/adaptivedemux/gstadaptivedemux.c:3716
#5  0x00007ffff7e24751 in gst_task_func (task=0x7ffee80c1dd0) at
../subprojects/gstreamer/gst/gsttask.c:328
#6  0x00007ffff7c37bf6 in  () at /usr/lib/libglib-2.0.so.0
#7  0x00007ffff7c371ea in  () at /usr/lib/libglib-2.0.so.0
#8  0x00007fffef840a9d in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007fffef442a43 in clone () at /usr/lib/libc.so.6

the same stream works with no crash in ffplay

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