Fix potential OOB read with Error Concealment
Fix potential OOB read with Error Concealment

This patch fixes an OOB read when error concealment is enabled and the
partition sizes are corrupt. The partition size read from the bitstream
was not being validated in EC mode.

Change-Id: Ia81dfd4bce1ab29ee78e42320abe52cee8318974

turbulenz/libvpx,genesi/libvpx0,jacklicn/webm.libvpx,running770/libvpx,Topopiccione/libvpx,openpeer/libvpx_new,reimaginemedia/webm.libvpx,hsueceumd/test_hui,awatry/libvpx.opencl,goodleixiao/vpx,luctrudeau/aom,ittiamvpx/libvpx,reimaginemedia/webm.libvpx,ittiamvpx/libvpx-1,thdav/aom,stewnorriss/libvpx,ShiftMediaProject/libvpx,mwgoldsmith/vpx,felipebetancur/libvpx,Acidburn0zzz/webm.libvpx,Acidburn0zzz/webm.libvpx,Suvarna1488/webm.libvpx,GrokImageCompression/aom,jmvalin/aom,zofuthan/libvpx,zofuthan/libvpx,pcwalton/libvpx,kleopatra999/webm.libvpx,mbebenita/aom,mwgoldsmith/libvpx,WebRTC-Labs/libvpx,openpeer/libvpx_new,felipebetancur/libvpx,awatry/libvpx.opencl,kim42083/webm.libvpx,abwiz0086/webm.libvpx,goodleixiao/vpx,ittiamvpx/libvpx-1,matanbs/webm.libvpx,altogother/webm.libvpx,lyx2014/libvpx_c,jmvalin/aom,gshORTON/webm.libvpx,GrokImageCompression/aom,pcwalton/libvpx,jacklicn/webm.libvpx,felipebetancur/libvpx,charup/https---github.com-webmproject-libvpx-,mbebenita/aom,hsueceumd/test_hui,running770/libvpx,liqianggao/libvpx,stewnorriss/libvpx,charup/https---github.com-webmproject-libvpx-,ittiamvpx/libvpx-1,Suvarna1488/webm.libvpx,zofuthan/libvpx,mwgoldsmith/vpx,iniwf/webm.libvpx,matanbs/vp982,webmproject/libvpx,mbebenita/aom,webmproject/libvpx,sanyaade-teachings/libvpx,altogother/webm.libvpx,kleopatra999/webm.libvpx,Topopiccione/libvpx,mwgoldsmith/vpx,vasilvv/esvp8,GrokImageCompression/aom,rikaunite/gst-opera_libvpx,webmproject/libvpx,matanbs/vp982,VTCSecureLLC/libvpx,luctrudeau/aom,jdm/libvpx,ittiamvpx/libvpx,sanyaade-teachings/libvpx,abwiz0086/webm.libvpx,smarter/aom,turbulenz/libvpx,felipebetancur/libvpx,charup/https---github.com-webmproject-libvpx-,openpeer/libvpx_new,jdm/libvpx,shareefalis/libvpx,gshORTON/webm.libvpx,rikaunite/gst-opera_libvpx,matanbs/webm.libvpx,matanbs/vp982,liqianggao/libvpx,awatry/libvpx.opencl,jmvalin/aom,abwiz0086/webm.libvpx,Distrotech/libvpx,iniwf/webm.libvpx,shyamalschandra/libvpx,reimaginemedia/webm.libvpx,Distrotech/libvpx,Maria1099/webm.libvpx,luctrudeau/aom,awatry/libvpx.opencl,mwgoldsmith/libvpx,altogother/webm.libvpx,pcwalton/libvpx,turbulenz/libvpx,n4t/libvpx,mbebenita/aom,goodleixiao/vpx,Laknot/libvpx,Maria1099/webm.libvpx,mbebenita/aom,WebRTC-Labs/libvpx,Distrotech/libvpx,shacklettbp/aom,smarter/aom,rikaunite/gst-opera_libvpx,cinema6/libvpx,hsueceumd/test_hui,jacklicn/webm.libvpx,liqianggao/libvpx,shacklettbp/aom,Distrotech/libvpx,mbebenita/aom,pcwalton/libvpx,sanyaade-teachings/libvpx,mbebenita/aom,webmproject/libvpx,shareefalis/libvpx,running770/libvpx,jdm/libvpx,genesi/libvpx0,kalli123/webm.libvpx,zofuthan/libvpx,matanbs/webm.libvpx,shyamalschandra/libvpx,kleopatra999/webm.libvpx,Laknot/libvpx,goodleixiao/vpx,Laknot/libvpx,Suvarna1488/webm.libvpx,GrokImageCompression/aom,thdav/aom,thdav/aom,hsueceumd/test_hui,rikaunite/gst-opera_libvpx,gshORTON/webm.libvpx,lyx2014/libvpx_c,Acidburn0zzz/webm.libvpx,abwiz0086/webm.libvpx,genesi/libvpx0,jmvalin/aom,charup/https---github.com-webmproject-libvpx-,hsueceumd/test_hui,vasilvv/esvp8,running770/libvpx,Acidburn0zzz/webm.libvpx,Suvarna1488/webm.libvpx,gshORTON/webm.libvpx,iniwf/webm.libvpx,kim42083/webm.libvpx,n4t/libvpx,kim42083/webm.libvpx,shyamalschandra/libvpx,ShiftMediaProject/libvpx,genesi/libvpx0,n4t/libvpx,shareefalis/libvpx,Maria1099/webm.libvpx,Maria1099/webm.libvpx,mwgoldsmith/vpx,cinema6/libvpx,stewnorriss/libvpx,vasilvv/esvp8,zofuthan/libvpx,lyx2014/libvpx_c,shareefalis/libvpx,jmvalin/aom,openpeer/libvpx_new,vasilvv/esvp8,kim42083/webm.libvpx,vasilvv/esvp8,sanyaade-teachings/libvpx,charup/https---github.com-webmproject-libvpx-,smarter/aom,altogother/webm.libvpx,shacklettbp/aom,running770/libvpx,Suvarna1488/webm.libvpx,shyamalschandra/libvpx,kalli123/webm.libvpx,GrokImageCompression/aom,smarter/aom,matanbs/vp982,abwiz0086/webm.libvpx,zofuthan/libvpx,smarter/aom,turbulenz/libvpx,Acidburn0zzz/webm.libvpx,WebRTC-Labs/libvpx,mwgoldsmith/libvpx,luctrudeau/aom,mwgoldsmith/vpx,luctrudeau/aom,goodleixiao/vpx,ShiftMediaProject/libvpx,jacklicn/webm.libvpx,Topopiccione/libvpx,shyamalschandra/libvpx,kalli123/webm.libvpx,iniwf/webm.libvpx,jdm/libvpx,webmproject/libvpx,vasilvv/esvp8,shacklettbp/aom,altogother/webm.libvpx,ittiamvpx/libvpx,mwgoldsmith/libvpx,turbulenz/libvpx,ShiftMediaProject/libvpx,charup/https---github.com-webmproject-libvpx-,running770/libvpx,cinema6/libvpx,abwiz0086/webm.libvpx,Topopiccione/libvpx,matanbs/webm.libvpx,shacklettbp/aom,kalli123/webm.libvpx,kalli123/webm.libvpx,webmproject/libvpx,Maria1099/webm.libvpx,sanyaade-teachings/libvpx,VTCSecureLLC/libvpx,ittiamvpx/libvpx,turbulenz/libvpx,n4t/libvpx,mwgoldsmith/vpx,jacklicn/webm.libvpx,felipebetancur/libvpx,VTCSecureLLC/libvpx,smarter/aom,mwgoldsmith/libvpx,gshORTON/webm.libvpx,n4t/libvpx,kim42083/webm.libvpx,cinema6/libvpx,iniwf/webm.libvpx,lyx2014/libvpx_c,lyx2014/libvpx_c,jacklicn/webm.libvpx,thdav/aom,luctrudeau/aom,shacklettbp/aom,WebRTC-Labs/libvpx,gshORTON/webm.libvpx,reimaginemedia/webm.libvpx,reimaginemedia/webm.libvpx,matanbs/vp982,mbebenita/aom,openpeer/libvpx_new,altogother/webm.libvpx,ittiamvpx/libvpx-1,genesi/libvpx0,pcwalton/libvpx,shareefalis/libvpx,kleopatra999/webm.libvpx,iniwf/webm.libvpx,kleopatra999/webm.libvpx,Topopiccione/libvpx,liqianggao/libvpx,Laknot/libvpx,liqianggao/libvpx,hsueceumd/test_hui,cinema6/libvpx,Suvarna1488/webm.libvpx,vasilvv/esvp8,turbulenz/libvpx,ittiamvpx/libvpx,pcwalton/libvpx,cinema6/libvpx,shareefalis/libvpx,matanbs/vp982,jdm/libvpx,Laknot/libvpx,shyamalschandra/libvpx,ittiamvpx/libvpx-1,Laknot/libvpx,matanbs/webm.libvpx,VTCSecureLLC/libvpx,jmvalin/aom,Acidburn0zzz/webm.libvpx,Distrotech/libvpx,WebRTC-Labs/libvpx,felipebetancur/libvpx,thdav/aom,VTCSecureLLC/libvpx,kalli123/webm.libvpx,ittiamvpx/libvpx,thdav/aom,kim42083/webm.libvpx,GrokImageCompression/aom,matanbs/vp982,jdm/libvpx,Distrotech/libvpx,stewnorriss/libvpx,kleopatra999/webm.libvpx,cinema6/libvpx,mwgoldsmith/libvpx,reimaginemedia/webm.libvpx,genesi/libvpx0,Maria1099/webm.libvpx,ShiftMediaProject/libvpx,goodleixiao/vpx,Topopiccione/libvpx,VTCSecureLLC/libvpx,turbulenz/libvpx,matanbs/webm.libvpx,rikaunite/gst-opera_libvpx,ittiamvpx/libvpx-1,mbebenita/aom,stewnorriss/libvpx,openpeer/libvpx_new,turbulenz/libvpx,lyx2014/libvpx_c,liqianggao/libvpx,stewnorriss/libvpx