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| author | Michael Niedermayer <michael@niedermayer.cc> | 2024-11-03 20:18:36 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2024-11-11 01:28:05 +0100 |
| commit | bf8e43083f68c383b9d905d2c8c791ac33ecc7bc (patch) | |
| tree | 069e3d3d433395ba91d10b5d6edb248f9795c58a | |
| parent | beca13a42e9fb5341e8bd6356fd7d9c2d18aac9b (diff) | |
| download | ffmpeg-bf8e43083f68c383b9d905d2c8c791ac33ecc7bc.tar.gz | |
avformat/mccdec: Initialize and check rate.den
Fixes: Assertion c > 0 failed at libavutil/mathematics.c:61
Fixes: use-of-uninitialized-value
Fixes: 42537627/clusterfuzz-testcase-minimized-fuzzer_protocol_memory-5939605805793280
Found-by: ossfuzz
Reported-by: Kacper Michajlow
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/mccdec.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libavformat/mccdec.c b/libavformat/mccdec.c index 85bf93cd3b..8c0ea09b6b 100644 --- a/libavformat/mccdec.c +++ b/libavformat/mccdec.c @@ -93,7 +93,7 @@ static int mcc_read_header(AVFormatContext *s) { MCCContext *mcc = s->priv_data; AVStream *st = avformat_new_stream(s, NULL); - AVRational rate; + AVRational rate = {0}; int64_t ts, pos; uint8_t out[4096]; char line[4096]; @@ -139,7 +139,7 @@ static int mcc_read_header(AVFormatContext *s) continue; } - if (av_sscanf(line, "%d:%d:%d:%d", &hh, &mm, &ss, &fs) != 4) + if (av_sscanf(line, "%d:%d:%d:%d", &hh, &mm, &ss, &fs) != 4 || rate.den <= 0) continue; ts = av_sat_add64(av_rescale(hh * 3600LL + mm * 60LL + ss, rate.num, rate.den), fs); |