[FFmpeg-cvslog] avcodec/dirac_parser: do not offset AV_NOPTS_OFFSET
Michael Niedermayer
git at videolan.org
Mon Oct 26 10:11:02 EET 2020
ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Fri Oct 23 20:29:50 2020 +0200| [343c3149ab3d77be76f035d3b18bb2b2da48ce1f] | committer: Michael Niedermayer
avcodec/dirac_parser: do not offset AV_NOPTS_OFFSET
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 at lynne.ee>
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=343c3149ab3d77be76f035d3b18bb2b2da48ce1f
---
libavcodec/dirac_parser.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/dirac_parser.c b/libavcodec/dirac_parser.c
index fbc7414c79..8e68b4a9da 100644
--- a/libavcodec/dirac_parser.c
+++ b/libavcodec/dirac_parser.c
@@ -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))
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