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avformat/jacosubdec: Fix overflow in get_shift() 

Fixes: 50993/clusterfuzz-testcase-minimized-ffmpeg_dem_JACOSUB_fuzzer-6722544461283328
Fixes: signed integer overflow: 48214448 * 60 cannot be represented in type 'int'

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 b1a68127bb)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2022-09-17 22:55:24 +02:00
parent 622893afe3
commit b8d29eab19
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1 changed files with 1 additions and 1 deletions
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libavformat/jacosubdec.c
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@ -145,7 +145,7 @@ static int get_shift(int timeres, const char *buf)
ret = 0;
switch (n) {
case 4:
ret = sign * (((int64_t)a*3600 + b*60 + c) * timeres + d);
ret = sign * (((int64_t)a*3600 + (int64_t)b*60 + c) * timeres + d);
break;
case 3:
ret = sign * (( (int64_t)a*60 + b) * timeres + c);