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avformat/hls: Check target_duration

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Fixes: signed integer overflow: 77777777777777 * 1000000 cannot be represented in type 'long long'
Fixes: 45545/clusterfuzz-testcase-minimized-ffmpeg_dem_HLS_fuzzer-6438101247983616

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Steven Liu <lingjiujianke@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2022-03-20 22:54:31 +01:00
parent 23e27a360e
commit a8fd3f7fab
1 changed files with 7 additions and 1 deletions
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8
libavformat/hls.c
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@ -819,10 +819,16 @@ static int parse_playlist(HLSContext *c, const char *url,
&info);
new_rendition(c, &info, url);
} else if (av_strstart(line, "#EXT-X-TARGETDURATION:", &ptr)) {
int64_t t;
ret = ensure_playlist(c, &pls, url);
if (ret < 0)
goto fail;
pls->target_duration = strtoll(ptr, NULL, 10) * AV_TIME_BASE;
t = strtoll(ptr, NULL, 10);
if (t < 0 || t >= INT64_MAX / AV_TIME_BASE) {
ret = AVERROR_INVALIDDATA;
goto fail;
}
pls->target_duration = t * AV_TIME_BASE;
} else if (av_strstart(line, "#EXT-X-MEDIA-SEQUENCE:", &ptr)) {
uint64_t seq_no;
ret = ensure_playlist(c, &pls, url);