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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-01-31 17:00:38 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-02-20 14:21:24 +0100 |
| commit | 4e08ecb7a4b8bff71b2c4af4e8145defae526285 (patch) | |
| tree | 066acb083f4f6cca87a66fe9488c25f645165cea | |
| parent | 186df3419c0a2e9b966333b39aa806e1df0afd5d (diff) | |
| download | ffmpeg-4e08ecb7a4b8bff71b2c4af4e8145defae526285.tar.gz | |
avformat/samidec: Sanity check pts
Fixes: signed integer overflow: 0 - -9223372036854775808 cannot be represented in type 'long'
Fixes: 29743/clusterfuzz-testcase-minimized-ffmpeg_dem_SAMI_fuzzer-5499256859394048
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 2014b0135293c41d261757bfa1aaba51653bab8e)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/samidec.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/libavformat/samidec.c b/libavformat/samidec.c index 3070ef9bac..cf5076c7b8 100644 --- a/libavformat/samidec.c +++ b/libavformat/samidec.c @@ -95,6 +95,11 @@ static int sami_read_header(AVFormatContext *s) const char *p = ff_smil_get_attr_ptr(buf.str, "Start"); sub->pos = pos; sub->pts = p ? strtol(p, NULL, 10) : 0; + if (sub->pts <= INT64_MIN/2 || sub->pts >= INT64_MAX/2) { + res = AVERROR_PATCHWELCOME; + goto end; + } + sub->duration = -1; } } |