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ffmpeg.wasm-core
Commit b956373b authored by Kostya Shishkov's avatar Kostya Shishkov
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Check for out-of-bounds access 

Originally committed as revision 7797 to svn://svn.ffmpeg.org/ffmpeg/trunk
parent 286c7107
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libavcodec/vc1.c
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...@@ -2890,8 +2890,8 @@ static int vc1_decode_i_block_adv(VC1Context *v, DCTELEM block[64], int n, int c ...@@ -2890,8 +2890,8 @@ static int vc1_decode_i_block_adv(VC1Context *v, DCTELEM block[64], int n, int c
ac_val -= 16 * s->block_wrap[n]; ac_val -= 16 * s->block_wrap[n];
q1 = s->current_picture.qscale_table[mb_pos]; q1 = s->current_picture.qscale_table[mb_pos];
if(dc_pred_dir && c_avail) q2 = s->current_picture.qscale_table[mb_pos - 1]; if(dc_pred_dir && c_avail && mb_pos) q2 = s->current_picture.qscale_table[mb_pos - 1];
if(!dc_pred_dir && a_avail) q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride]; if(!dc_pred_dir && a_avail && mb_pos >= s->mb_stride) q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];
if(n && n<4) q2 = q1; if(n && n<4) q2 = q1;
if(coded) { if(coded) {
......
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