1. ffmpeg
  2. Commit 98fa61c020722f7251435f3377eba449127962d8
Browse code

avcodec/gdv: Check for truncated tags in decompress_5()

Testcase: 13169/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_GDV_fuzzer-5666354038833152

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 5cf42f65b60d226d1223d2100cb1d90402189275)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Michael Niedermayer authored on 2019/02/25 09:26:30
Showing 1 changed files
libavcodec/gdv.c
History View file @ 98fa61c
... ... 
@@ -244,6 +244,8 @@ static int decompress_5(AVCodecContext *avctx, unsigned skip)
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     while (bytestream2_get_bytes_left_p(pb) > 0 && bytestream2_get_bytes_left(gb) > 0) {
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         int tag = read_bits2(&bits, gb);
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+        if (bytestream2_get_bytes_left(gb) < 1)
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+            return AVERROR_INVALIDDATA;
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         if (tag == 0) {
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             bytestream2_put_byte(pb, bytestream2_get_byte(gb));
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         } else if (tag == 1) {