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avformat/wavdec: Check avio_get_str16le() for failure 

Fixes: out of array access
Fixes: 29195/clusterfuzz-testcase-minimized-ffmpeg_dem_W64_fuzzer-5037853281222656

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2021-01-29 23:58:04 +01:00
parent 47be08640c
commit d7594ee751
1 changed files with 4 additions and 0 deletions
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4
libavformat/wavdec.c
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@ -922,6 +922,10 @@ static int w64_read_header(AVFormatContext *s)
return AVERROR(ENOMEM);
ret = avio_get_str16le(pb, chunk_size, value, chunk_size);
if (ret < 0) {
av_free(value);
return ret;
}
avio_skip(pb, chunk_size - ret);
av_dict_set(&s->metadata, chunk_key, value, AV_DICT_DONT_STRDUP_VAL);