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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-03-05 20:14:05 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2019-03-14 16:24:35 +0100 |
| commit | a8c5ae451184e879fc8ff1333c6f26f9542c8ebf (patch) | |
| tree | 3705fed2a83758e01b5177b5ed56b6819c42351a | |
| parent | 9a9f0e239c1c6f5c96cc90ba673087f86ca1eabc (diff) | |
avcodec/dvbsubdec: Check object position
Reference: ETSI EN 300 743 V1.2.1 7.2.2 Region composition segment
Fixes: Timeout
Fixes: 13325/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_DVBSUB_fuzzer-5143979392237568
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 | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/libavcodec/dvbsubdec.c b/libavcodec/dvbsubdec.c index b59e836657..bc4a17bde0 100644 --- a/libavcodec/dvbsubdec.c +++ b/libavcodec/dvbsubdec.c @@ -1267,6 +1267,13 @@ static int dvbsub_parse_region_segment(AVCodecContext *avctx, display->y_pos = AV_RB16(buf) & 0xfff; buf += 2; + if (display->x_pos >= region->width || + display->y_pos >= region->height) { + av_log(avctx, AV_LOG_ERROR, "Object outside region\n"); + av_free(display); + return AVERROR_INVALIDDATA; + } + if ((object->type == 1 || object->type == 2) && buf+1 < buf_end) { display->fgcolor = *buf++; display->bgcolor = *buf++; |