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| author | Michael Niedermayer <michael@niedermayer.cc> | 2022-12-06 22:56:10 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2022-12-25 19:33:24 +0100 |
| commit | 125e01d6cc111027c0c5f5fe6a787154c9a96006 (patch) | |
| tree | 3fd4c9344ddd2b76dd387bad6015cd1d4881d40f | |
| parent | 9f040556696943f902290337a74eb9ee99c8a942 (diff) | |
| download | ffmpeg-125e01d6cc111027c0c5f5fe6a787154c9a96006.tar.gz | |
avcodec/dts2pts_bsf: Avoid searching for poc == INT_MIN-1
Fixes: signed integer overflow: -2147483648 - 1 cannot be represented in type 'int'
Fixes: 53876/clusterfuzz-testcase-minimized-ffmpeg_BSF_DTS2PTS_fuzzer-6569754750222336
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/dts2pts_bsf.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/libavcodec/dts2pts_bsf.c b/libavcodec/dts2pts_bsf.c index 522d5e1eb0..48612e59db 100644 --- a/libavcodec/dts2pts_bsf.c +++ b/libavcodec/dts2pts_bsf.c @@ -461,9 +461,10 @@ static int dts2pts_filter(AVBSFContext *ctx, AVPacket *out) poc_node = av_tree_find(s->root, &dup, cmp_find, NULL); } } - } else { + } else if (s->eof && frame.poc > INT_MIN) { DTS2PTSFrame dup = (DTS2PTSFrame) { NULL, frame.poc - 1, frame.poc_diff, frame.gop }; - if (s->eof && (poc_node = av_tree_find(s->root, &dup, cmp_find, NULL)) && poc_node->poc == dup.poc) { + poc_node = av_tree_find(s->root, &dup, cmp_find, NULL); + if (poc_node && poc_node->poc == dup.poc) { out->pts = poc_node->dts; if (out->pts != AV_NOPTS_VALUE) out->pts += poc_node->duration; @@ -480,7 +481,8 @@ static int dts2pts_filter(AVBSFContext *ctx, AVPacket *out) poc_node->poc, poc_node->gop, poc_node->dts, poc_node->duration); } else av_log(ctx, AV_LOG_WARNING, "No timestamp for POC %d in tree\n", frame.poc); - } + } else + av_log(ctx, AV_LOG_WARNING, "No timestamp for POC %d in tree\n", frame.poc); av_log(ctx, AV_LOG_DEBUG, "Returning frame for POC %d, GOP %d, dts %"PRId64", pts %"PRId64"\n", frame.poc, frame.gop, out->dts, out->pts); |