libavcodec/dnxhdenc.c:420: error: Buffer Overrun L1
  Offset added: 512 Size: 128.

libavcodec/dnxhdenc.c:401:1: <Length trace>
399. }
400. 
401. static av_always_inline void dnxhd_get_blocks(DNXHDEncContext *ctx, int mb_x, int mb_y)
     ^
402. {
403.     const uint8_t *ptr_y = ctx->thread[0]->src[0] + ((mb_y << 4) * ctx->m.linesize)   + (mb_x << 4);

libavcodec/dnxhdenc.c:401:1: Parameter `ctx->blocks[*][*]`
399. }
400. 
401. static av_always_inline void dnxhd_get_blocks(DNXHDEncContext *ctx, int mb_x, int mb_y)
     ^
402. {
403.     const uint8_t *ptr_y = ctx->thread[0]->src[0] + ((mb_y << 4) * ctx->m.linesize)   + (mb_x << 4);

libavcodec/dnxhdenc.c:420:13: Array access: Offset added: 512 Size: 128
418.             dnxhd_get_pixels_4x8(ctx->blocks[7], ptr_v + ctx->dct_uv_offset   , ctx->m.uvlinesize);
419.         } else
420.             memset(ctx->blocks[4], 0, 4*64*sizeof(DCTELEM));
                 ^
421.     } else {
422.         dsp->get_pixels(ctx->blocks[4], ptr_y + ctx->dct_y_offset    , ctx->m.linesize);
