avcodec/dvbsubdec: Check for duplicate regions in dvbsub_parse_page_segment()

Fixes: OOM Fixes: 3051/clusterfuzz-testcase-minimized-5745818336231424

Michael Niedermayer committed 9 years ago

Commit 7c100681 parent 8a0954d1 file · +9 −0Browse files

Showing the changes to libavcodec (1 of 1 file). Show all

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@@ -1302,6 +1302,15 @@ static int dvbsub_parse_page_segment(AVCodecContext *avctx, · 1301 unmodified lines
1302	1302	region_id = *buf++;
1303	1303	buf += 1;
1304	1304
	1305	+ display = ctx->display_list;
	1306	+ while (display && display->region_id != region_id) {
	1307	+ display = display->next;
	1308	+ }
	1309	+ if (display) {
	1310	+ av_log(avctx, AV_LOG_ERROR, "duplicate region\n");
	1311	+ break;
	1312	+ }
	1313	+
1305	1314	display = tmp_display_list;
1306	1315	tmp_ptr = &tmp_display_list;
1307	1316

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