[Bug 777940] New: qtdemux: huge memory allocation

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=777940

            Bug ID: 777940
           Summary: qtdemux: huge memory allocation
    Classification: Platform
           Product: GStreamer
           Version: unspecified
                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: ---

Created attachment 344542
  --> https://bugzilla.gnome.org/attachment.cgi?id=344542&action=edit
poc file

The attached file will cause an attempt to allocate 56 gigabytes of ram.

ASAN error:

==5089==AddressSanitizer CHECK failed:
/var/tmp/portage/sys-devel/llvm-3.9.1/work/llvm-3.9.1.src/projects/compiler-rt/lib/sanitizer_common/sanitizer_common.cc:120
"((0 && "unable to mmap")) != (0)" (0x0, 0x0)
    #0 0x4d675f in __asan::AsanCheckFailed(char const*, int, char const*,
unsigned long long, unsigned long long) (/usr/bin/gst-discoverer-1.0+0x4d675f)
    #1 0x4f0315 in __sanitizer::CheckFailed(char const*, int, char const*,
unsigned long long, unsigned long long) (/usr/bin/gst-discoverer-1.0+0x4f0315)
    #2 0x4e0412 in __sanitizer::ReportMmapFailureAndDie(unsigned long, char
const*, char const*, int, bool) (/usr/bin/gst-discoverer-1.0+0x4e0412)
    #3 0x4e94a5 in __sanitizer::MmapOrDie(unsigned long, char const*, bool)
(/usr/bin/gst-discoverer-1.0+0x4e94a5)
    #4 0x42297f in __asan::asan_malloc(unsigned long,
__sanitizer::BufferedStackTrace*) (/usr/bin/gst-discoverer-1.0+0x42297f)
    #5 0x4cbb94 in malloc (/usr/bin/gst-discoverer-1.0+0x4cbb94)
    #6 0x7f39609b0768 in g_malloc
/var/tmp/portage/dev-libs/glib-2.50.2/work/glib-2.50.2/glib/gmem.c:94
    #7 0x7f3953fa138b in qtdemux_parse_segments
/f/gstreamer/gst-plugins-good/gst/isomp4/qtdemux.c:8775:24
    #8 0x7f3953fa138b in qtdemux_parse_trak
/f/gstreamer/gst-plugins-good/gst/isomp4/qtdemux.c:11327
    #9 0x7f3953f6ba82 in qtdemux_parse_tree
/f/gstreamer/gst-plugins-good/gst/isomp4/qtdemux.c:12925:5
    #10 0x7f3953f5cdb2 in gst_qtdemux_loop_state_header
/f/gstreamer/gst-plugins-good/gst/isomp4/qtdemux.c:4273:7
    #11 0x7f3953f5cdb2 in gst_qtdemux_loop
/f/gstreamer/gst-plugins-good/gst/isomp4/qtdemux.c:5810
    #12 0x7f39617d5973 in gst_task_func
/f/gstreamer/gstreamer/gst/gsttask.c:334:5
    #13 0x7f39609d2b2d in g_thread_pool_thread_proxy
/var/tmp/portage/dev-libs/glib-2.50.2/work/glib-2.50.2/glib/gthreadpool.c:307
    #14 0x7f39609d2154 in g_thread_proxy
/var/tmp/portage/dev-libs/glib-2.50.2/work/glib-2.50.2/glib/gthread.c:784
    #15 0x7f3960450453 in start_thread (/lib64/libpthread.so.0+0x7453)
    #16 0x7f395ff805dc in clone (/lib64/libc.so.6+0xe75dc)

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