[gstreamer-bugs] [Bug 547919] New: read 1 byte after allocated memory for ogg_packet

[GStreamer (bugzilla.gnome.org)]

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  GStreamer | gst-plugins-base | Ver: 0.10.18
           Summary: read 1 byte after allocated memory for ogg_packet
           Product: GStreamer
           Version: 0.10.18
          Platform: Other
        OS/Version: All
            Status: UNCONFIRMED
          Severity: minor
          Priority: Normal
         Component: gst-plugins-base
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: peter at cs.upt.ro
         QAContact: gstreamer-bugs at lists.sourceforge.net
     GNOME version: Unspecified
   GNOME milestone: Unspecified


Hi,

I encountered the following problem while debugging with valgrind a small
application. The same shows up when using totem-gstreamer and many ogg files.
It seems that theora_read tries to read one byte past de ogg packet (see
valgrind output below). My arch is 64bit, os is ubuntu hardy. Stream seems to
play allright otherwise.

==21621== Invalid read of size 1
==21621==    at 0xB097B24: oggpackB_read (bitwise.c:360)
==21621==    by 0xB8D73B8: theora_read (decode.c:67)
==21621==    by 0xB8D5531: th_decode_headerin (decinfo.c:132)
==21621==    by 0xB8D4655: theora_decode_header (decapiwrapper.c:147)
==21621==    by 0xB6C9C8D: theora_dec_decode_buffer (theoradec.c:890)
==21621==    by 0xB6CA7B2: theora_dec_chain (theoradec.c:1437)
==21621==    by 0x51357E8: gst_pad_chain_unchecked (gstpad.c:3523)
==21621==    by 0xAA68500: gst_ogg_pad_stream_out (gstoggdemux.c:822)
==21621==    by 0xAA69870: gst_ogg_pad_submit_page (gstoggdemux.c:1162)
==21621==    by 0xAA69E65: gst_ogg_demux_read_chain (gstoggdemux.c:2405)
==21621==    by 0xAA6B407: gst_ogg_demux_loop (gstoggdemux.c:2665)
==21621==    by 0x514FB28: gst_task_func (gsttask.c:192)
==21621==  Address 0xe837b60 is 0 bytes after a block of size 80 alloc'd
==21621==    at 0x4C22FAB: malloc (vg_replace_malloc.c:207)
==21621==    by 0x4E65EBB: g_malloc (in /usr/lib/libglib-2.0.so.0.1600.4)
==21621==    by 0x511386E: gst_buffer_new_and_alloc (gstbuffer.c:328)
==21621==    by 0xAA684B2: gst_ogg_pad_stream_out (gstoggdemux.c:816)
==21621==    by 0xAA69870: gst_ogg_pad_submit_page (gstoggdemux.c:1162)
==21621==    by 0xAA69E65: gst_ogg_demux_read_chain (gstoggdemux.c:2405)
==21621==    by 0xAA6B407: gst_ogg_demux_loop (gstoggdemux.c:2665)
==21621==    by 0x514FB28: gst_task_func (gsttask.c:192)
==21621==    by 0x4E85E86: (within /usr/lib/libglib-2.0.so.0.1600.4)
==21621==    by 0x4E84283: (within /usr/lib/libglib-2.0.so.0.1600.4)
==21621==    by 0x634F3F6: start_thread (pthread_create.c:297)
==21621==    by 0x6A68B2C: clone (in /usr/lib/debug/libc-2.7.so)


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