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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-03-30 13:17:09 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-04-01 11:38:45 +0200 |
| commit | 426c52c2ce47ea1dc066e6f6a3e0095de932619c (patch) | |
| tree | f2001b0d557a3cb2527540fe3109ca262c9bd9ef | |
| parent | 15f1648f7fe65aadea4bfc1e2a72feaf30110aa0 (diff) | |
| download | ffmpeg-426c52c2ce47ea1dc066e6f6a3e0095de932619c.tar.gz | |
avcodec/lscrdec: Check length in decode_idat()
Fixes: out of array access
Fixes: 32264/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_LSCR_fuzzer-6684504010915840
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 c01cd2a8b2a67da975d51fdf03f18c502df2e13c)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/lscrdec.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/libavcodec/lscrdec.c b/libavcodec/lscrdec.c index f5cfe1fa04..042da84bf9 100644 --- a/libavcodec/lscrdec.c +++ b/libavcodec/lscrdec.c @@ -76,6 +76,10 @@ static int decode_idat(LSCRContext *s, int length) int ret; s->zstream.avail_in = FFMIN(length, bytestream2_get_bytes_left(&s->gb)); s->zstream.next_in = s->gb.buffer; + + if (length <= 0) + return AVERROR_INVALIDDATA; + bytestream2_skip(&s->gb, length); /* decode one line if possible */ |