[Bug 769765] v4l2: Sanitise buffer sizes provided by v4l2

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=769765

Sebastian Dröge (slomo) <slomo at coaxion.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |slomo at coaxion.net
         Resolution|---                         |FIXED

--- Comment #7 from Sebastian Dröge (slomo) <slomo at coaxion.net> ---
commit 56b1d088a9a6c69f8c1f3067bc261e88632fae4a
Author: William Manley <will at williammanley.net>
Date:   Sat Oct 8 18:11:17 2016 +0200

    v4l2: Warn, don't assert if v4l gives us a buffer with a too large size

    I've seen problems where the `bytesused` field of `v4l2_buffer` would be
    a silly number causing the later call to:

        gst_memory_resize (group->mem[i], 0, group->planes[i].bytesused);

    to result in this error to be printed:

        (pulsevideo:11): GStreamer-CRITICAL **: gst_memory_resize: assertion
'size + mem->offset + offset <= mem->maxsize' failed

    besides causing who-knows what other problems.

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