[Bug 775472] New: memory leak in matroska parser / gst_ebml_read_binary

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=775472

            Bug ID: 775472
           Summary: memory leak in matroska parser / gst_ebml_read_binary
    Classification: Platform
           Product: GStreamer
           Version: git master
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gst-plugins-good
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: hanno at hboeck.de
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

This file
https://samples.mplayerhq.hu/Matroska/ticket-a_aac.mkv
causes a memory leak with gst-discoverer-1.0.

==9181==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 2050263 byte(s) in 2 object(s) allocated from:
    #0 0x4d4e28 in malloc (/usr/bin/gst-discoverer-1.0+0x4d4e28)
    #1 0x7f989d104aa8 in g_malloc (/usr/lib64/libglib-2.0.so.0+0x4faa8)
    #2 0x7f989d11e637 in g_memdup (/usr/lib64/libglib-2.0.so.0+0x69637)
    #3 0x7f9890c50298 in gst_ebml_read_binary
/f/gstreamer/gst-plugins-good/gst/matroska/ebml-read.c:666:13
    #4 0x7f9890cdc1cc in gst_matroska_read_common_parse_attached_file
/f/gstreamer/gst-plugins-good/gst/matroska/matroska-read-common.c:577:15
    #5 0x7f9890cdc1cc in gst_matroska_read_common_parse_attachments
/f/gstreamer/gst-plugins-good/gst/matroska/matroska-read-common.c:708
    #6 0x7f9890c6a123 in gst_matroska_demux_parse_id
/f/gstreamer/gst-plugins-good/gst/matroska/matroska-demux.c:4514:19
    #7 0x7f9890c97376 in gst_matroska_demux_parse_contents_seekentry
/f/gstreamer/gst-plugins-good/gst/matroska/matroska-demux.c:4042:15
    #8 0x7f9890c6a8a7 in gst_matroska_demux_parse_contents
/f/gstreamer/gst-plugins-good/gst/matroska/matroska-demux.c:4091:15
    #9 0x7f9890c6a8a7 in gst_matroska_demux_parse_id
/f/gstreamer/gst-plugins-good/gst/matroska/matroska-demux.c:4544
    #10 0x7f9890c62f1a in gst_matroska_demux_loop
/f/gstreamer/gst-plugins-good/gst/matroska/matroska-demux.c:4683:9
    #11 0x7f989df2a5d3 in gst_task_func
/f/gstreamer/gstreamer/gst/gsttask.c:334:5
    #12 0x7f989d127627  (/usr/lib64/libglib-2.0.so.0+0x72627)
    #13 0x7f989d126c94  (/usr/lib64/libglib-2.0.so.0+0x71c94)
    #14 0x7f989cba3453 in start_thread (/lib64/libpthread.so.0+0x7453)
    #15 0x7f989c6d35dc in clone (/lib64/libc.so.6+0xe75dc)

SUMMARY: AddressSanitizer: 2050263 byte(s) leaked in 2 allocation(s).

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