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avformat/tta: Better totalframes check 

Fixes: signed integer overflow: 4 * 740491135 cannot be represented in type 'int'
Fixes: 51896/clusterfuzz-testcase-minimized-ffmpeg_dem_TTA_fuzzer-6298893367508992

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 2023-09-30 21:28:55 +02:00
parent b3c973acbe
commit 5f0d00464a
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1 changed files with 1 additions and 1 deletions
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libavformat/tta.c
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@ -91,7 +91,7 @@ static int tta_read_header(AVFormatContext *s)
c->totalframes = nb_samples / c->frame_size + (c->last_frame_size < c->frame_size);
c->currentframe = 0;
if(c->totalframes >= UINT_MAX/sizeof(uint32_t) || c->totalframes <= 0){
if(c->totalframes >= (INT_MAX - 4)/sizeof(uint32_t) || c->totalframes <= 0){
av_log(s, AV_LOG_ERROR, "totalframes %d invalid\n", c->totalframes);
return AVERROR_INVALIDDATA;
}