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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-09-09 20:30:32 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-07-01 12:49:26 +0200 |
| commit | da5941248e82d73651a0b25b4086738dadbf3d43 (patch) | |
| tree | c88299db08969b36683353b88808809db4e889c4 | |
| parent | 4dda4cd7751e2b1b73ea805d8b4ee313134e1535 (diff) | |
| download | ffmpeg-da5941248e82d73651a0b25b4086738dadbf3d43.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 d94b2f7001..6ad771abd7 100644 --- a/libavcodec/g2meet.c +++ b/libavcodec/g2meet.c @@ -243,6 +243,9 @@ 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) |