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avcodec/dirac_parser: do not offset AV_NOPTS_OFFSET

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Fixes: signed integer overflow: -9223372036854775807 - 48000 cannot be represented in type 'long long'
Fixes: 26521/clusterfuzz-testcase-minimized-ffmpeg_dem_DIRAC_fuzzer-5635536506847232

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Lynne <dev@lynne.ee>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2020-10-23 20:29:50 +02:00
parent 307a1b8e54
commit 343c3149ab
1 changed files with 1 additions and 1 deletions
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2
libavcodec/dirac_parser.c
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@ -215,7 +215,7 @@ static int dirac_combine_frame(AVCodecParserContext *s, AVCodecContext *avctx,
int64_t pts = AV_RB32(cur_pu + 13);
if (s->last_pts == 0 && s->last_dts == 0)
s->dts = pts - 1;
else
else if (s->last_dts != AV_NOPTS_VALUE)
s->dts = s->last_dts + 1;
s->pts = pts;
if (!avctx->has_b_frames && (cur_pu[4] & 0x03))