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avformat/qcp: Avoid negative nb_rates 

Fixes: signed integer overflow: 2 * -1725947872 cannot be represented in type 'int'
Fixes: 29102/clusterfuzz-testcase-minimized-ffmpeg_dem_QCP_fuzzer-6726807632084992

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 1b865cc703)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2021-04-25 20:16:38 +02:00
parent dda8d338a1
commit 7da58f8fe7
1 changed files with 2 additions and 1 deletions
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3
libavformat/qcp.c
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@ -93,7 +93,8 @@ static int qcp_read_header(AVFormatContext *s)
QCPContext *c = s->priv_data;
AVStream *st = avformat_new_stream(s, NULL);
uint8_t buf[16];
int i, nb_rates;
int i;
unsigned nb_rates;
if (!st)
return AVERROR(ENOMEM);