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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-10-04 17:10:38 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-07-01 12:49:26 +0200 |
| commit | 0799b34bbda888e2acb43b0c47f88703288e210d (patch) | |
| tree | 9aceefdf7db9e13df7a8be319ba7f9f406a03b9b | |
| parent | 5cc96ce0e710659ea21c57ffe693695520e3e7bb (diff) | |
| download | ffmpeg-0799b34bbda888e2acb43b0c47f88703288e210d.tar.gz | |
avformat/pjsdec: Check duration for overflow
Fixes: signed integer overflow: -3 - 9223372036854775807 cannot be represented in type 'long'
Fixes: 17828/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-5645915116797952
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 1efaac69328bdc17680924c71be7ec990f0e8f2c)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/pjsdec.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libavformat/pjsdec.c b/libavformat/pjsdec.c index bb587b569a..448962bf8a 100644 --- a/libavformat/pjsdec.c +++ b/libavformat/pjsdec.c @@ -55,6 +55,8 @@ static int64_t read_ts(char **line, int *duration) if (sscanf(*line, "%"SCNd64",%"SCNd64, &start, &end) == 2) { *line += strcspn(*line, "\""); *line += !!**line; + if (end < start || end - (uint64_t)start > INT_MAX) + return AV_NOPTS_VALUE; *duration = end - start; return start; } |