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avformat/thp: Check fps

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Fixes: division by zero
Fixes: 23162/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-4856420817436672

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2020-06-08 09:28:55 +02:00
parent 9a42a67c5c
commit 0e15b01b4e
1 changed files with 2 additions and 0 deletions
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2
libavformat/thp.c
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@ -75,6 +75,8 @@ static int thp_read_header(AVFormatContext *s)
avio_rb32(pb); /* Max samples. */ avio_rb32(pb); /* Max samples. */
thp->fps = av_d2q(av_int2float(avio_rb32(pb)), INT_MAX); thp->fps = av_d2q(av_int2float(avio_rb32(pb)), INT_MAX);
if (thp->fps.den <= 0 || thp->fps.num < 0)
return AVERROR_INVALIDDATA;
thp->framecnt = avio_rb32(pb); thp->framecnt = avio_rb32(pb);
thp->first_framesz = avio_rb32(pb); thp->first_framesz = avio_rb32(pb);
pb->maxsize = avio_rb32(pb); pb->maxsize = avio_rb32(pb);