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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-08-22 03:31:49 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-08-25 23:38:24 +0200 |
| commit | 7c10068da10aa288195f5eb5d7e34eb2d8ff7447 (patch) | |
| tree | fee27aab58a799863230cf5696c2f1d25b40c7fb | |
| parent | 8a0954dd51ca5c8f8e1c6d2c2d0961ae24055814 (diff) | |
| download | ffmpeg-7c10068da10aa288195f5eb5d7e34eb2d8ff7447.tar.gz | |
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>
| -rw-r--r-- | libavcodec/dvbsubdec.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/libavcodec/dvbsubdec.c b/libavcodec/dvbsubdec.c index 98619f9631..b683109643 100644 --- a/libavcodec/dvbsubdec.c +++ b/libavcodec/dvbsubdec.c @@ -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; |