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

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

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-08-22 03:31:49 +02:00
parent 8a0954dd51
commit 7c10068da1
1 changed files with 9 additions and 0 deletions
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9
libavcodec/dvbsubdec.c
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@ -1302,6 +1302,15 @@ static int dvbsub_parse_page_segment(AVCodecContext *avctx,
region_id = *buf++;
buf += 1;
display = ctx->display_list;
while (display && display->region_id != region_id) {
display = display->next;
}
if (display) {
av_log(avctx, AV_LOG_ERROR, "duplicate region\n");
break;
}
display = tmp_display_list;
tmp_ptr = &tmp_display_list;