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avformat/tta: Use 64bit intermediate for index

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Fixes: signed integer overflow: 42032 * 51092 cannot be represented in type 'int'
Fixes: 26910/clusterfuzz-testcase-minimized-ffmpeg_dem_TTA_fuzzer-6679539648430080

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 2021-01-17 22:57:28 +01:00
parent b0588b73da
commit fd61b42b4c
1 changed files with 1 additions and 1 deletions
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libavformat/tta.c
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@ -119,7 +119,7 @@ static int tta_read_header(AVFormatContext *s)
for (i = 0; i < c->totalframes; i++) { for (i = 0; i < c->totalframes; i++) {
uint32_t size = avio_rl32(s->pb); uint32_t size = avio_rl32(s->pb);
int r; int r;
if ((r = av_add_index_entry(st, framepos, i * c->frame_size, size, 0, if ((r = av_add_index_entry(st, framepos, i * (int64_t)c->frame_size, size, 0,
AVINDEX_KEYFRAME)) < 0) AVINDEX_KEYFRAME)) < 0)
return r; return r;
framepos += size; framepos += size;