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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-11-07 21:11:32 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-02-02 14:18:21 +0100 |
| commit | 9e1fede2315c5ab0ca87290eaff7facfe7bbc43c (patch) | |
| tree | 607b8d7ee1d7b3d83914370e0bd247c405a1377b | |
| parent | 220eaaf6b6ca08b5a5bf211be62a7cfdd1a42271 (diff) | |
| download | ffmpeg-9e1fede2315c5ab0ca87290eaff7facfe7bbc43c.tar.gz | |
avformat/tedcaptionsdec: Check for overflow in parse_int()
Fixes: signed integer overflow: 1111111111111111111 * 10 cannot be represented in type 'long'
Fixes: 26892/clusterfuzz-testcase-minimized-ffmpeg_dem_TEDCAPTIONS_fuzzer-5756045055754240
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 b0f8586ca9853ab3d324ccd3c42bad4375000b0a)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/tedcaptionsdec.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libavformat/tedcaptionsdec.c b/libavformat/tedcaptionsdec.c index 3255819e77..8b44528982 100644 --- a/libavformat/tedcaptionsdec.c +++ b/libavformat/tedcaptionsdec.c @@ -181,6 +181,8 @@ static int parse_int(AVIOContext *pb, int *cur_byte, int64_t *result) if ((unsigned)*cur_byte - '0' > 9) return AVERROR_INVALIDDATA; while (BETWEEN(*cur_byte, '0', '9')) { + if (val > INT_MAX/10 - (*cur_byte - '0')) + return AVERROR_INVALIDDATA; val = val * 10 + (*cur_byte - '0'); next_byte(pb, cur_byte); } |