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avformat/wavdec: Check that smv block fits in available space 

Fixes: OOM
Fixes: 56271/clusterfuzz-testcase-minimized-ffmpeg_dem_WAV_fuzzer-5290810045497344

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 a76efafdb9)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2023-03-05 00:51:38 +01:00
parent bb34d18e33
commit 4e377ec8dc
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1 changed files with 4 additions and 0 deletions
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4
libavformat/wavdec.c
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@ -647,6 +647,10 @@ smv_retry:
goto smv_out;
}
size = avio_rl24(s->pb);
if (size > wav->smv_block_size) {
ret = AVERROR_EOF;
goto smv_out;
}
ret = av_get_packet(s->pb, pkt, size);
if (ret < 0)
goto smv_out;