libavfilter/vf_unsharp.c:237: error: Integer Overflow L2
  ([0, +oo] - 1):unsigned32 by call to `ff_filter_frame`.

libavfilter/vf_unsharp.c:234:5: Call
232.     apply_unsharp(out->data[0], out->linesize[0], in->data[0], in->linesize[0], link->w, link->h, &unsharp->luma);
233.     apply_unsharp(out->data[1], out->linesize[1], in->data[1], in->linesize[1], cw,      ch,      &unsharp->chroma);
234.     apply_unsharp(out->data[2], out->linesize[2], in->data[2], in->linesize[2], cw,      ch,      &unsharp->chroma);
         ^
235. 
236.     avfilter_unref_bufferp(&in);

libavfilter/vf_unsharp.c:70:1: Parameter `dst->strlen`
  68. } UnsharpContext;
  69. 
  70. static void apply_unsharp(      uint8_t *dst, int dst_stride,
      ^
  71.                           const uint8_t *src, int src_stride,
  72.                           int width, int height, FilterParam *fp)

libavfilter/vf_unsharp.c:237:12: Call
235. 
236.     avfilter_unref_bufferp(&in);
237.     return ff_filter_frame(outlink, out);
                ^
238. }
239. 

libavfilter/avfilter.c:459:1: Parameter `frame->buf->refcount`
  457. }
  458. 
  459. int ff_filter_frame(AVFilterLink *link, AVFilterBufferRef *frame)
       ^
  460. {
  461.     int (*filter_frame)(AVFilterLink *, AVFilterBufferRef *);

libavfilter/avfilter.c:493:13: Call
  491.         }
  492.         if (!out) {
  493.             avfilter_unref_buffer(frame);
                   ^
  494.             return AVERROR(ENOMEM);
  495.         }

libavfilter/buffer.c:75:1: <LHS trace>
73. }
74. 
75. void avfilter_unref_buffer(AVFilterBufferRef *ref)
    ^
76. {
77.     if (!ref)

libavfilter/buffer.c:75:1: Parameter `ref->buf->refcount`
    73. }
    74. 
    75. void avfilter_unref_buffer(AVFilterBufferRef *ref)
        ^
    76. {
    77.     if (!ref)

libavfilter/buffer.c:79:11: Binary operation: ([0, +oo] - 1):unsigned32 by call to `ff_filter_frame` 
    77.     if (!ref)
    78.         return;
    79.     if (!(--ref->buf->refcount))
                  ^
    80.         ref->buf->free(ref->buf);
    81.     if (ref->extended_data != ref->data)
