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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-09-09 20:30:32 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-01-06 11:30:43 +0100 |
| commit | c8823d4957cd4e78683e871ff3f64dfbfb88b03f (patch) | |
| tree | 5b6d1800fe43aa57f835e572028d4333cc413cd5 | |
| parent | a547d59079b4d614730866cbae56c43926142d58 (diff) | |
| download | ffmpeg-c8823d4957cd4e78683e871ff3f64dfbfb88b03f.tar.gz | |
avcodec/g2meet: Check for end of input in jpg_decode_block()
Fixes: Timeout (100sec -> 0.7sec)
Fixes: 8668/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_G2M_fuzzer-5174143888130048
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 61dd2e07be7ca636e1d3d868f90dde1b10985f4c)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/g2meet.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/libavcodec/g2meet.c b/libavcodec/g2meet.c index 19e1c130ce..731d29a5d4 100644 --- a/libavcodec/g2meet.c +++ b/libavcodec/g2meet.c @@ -244,6 +244,9 @@ static int jpg_decode_block(JPGContext *c, GetBitContext *gb, const int is_chroma = !!plane; const uint8_t *qmat = is_chroma ? chroma_quant : luma_quant; + if (get_bits_left(gb) < 1) + return AVERROR_INVALIDDATA; + c->bdsp.clear_block(block); dc = get_vlc2(gb, c->dc_vlc[is_chroma].table, 9, 3); if (dc < 0) |