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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-03-09 21:39:30 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-09-09 13:53:29 +0200 |
| commit | 6505b2f7a80a6a10f4f19fbed195d16fc4d350f3 (patch) | |
| tree | fbc2fb20cb8eb9884fe708bca3eeaeb02ce29e75 | |
| parent | a0bda2923b0426984c6ed9d9ce127c6a165f9361 (diff) | |
| download | ffmpeg-6505b2f7a80a6a10f4f19fbed195d16fc4d350f3.tar.gz | |
avcodec/4xm: Check pre_gb in decode_i_block()
Fixes: Timeout
Fixes: 31257/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_FOURXM_fuzzer-5150866229297152
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 b87781649e2862d07fcb8d322289d89b47a530b6)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/4xm.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libavcodec/4xm.c b/libavcodec/4xm.c index 2ee742fccd..5321b103af 100644 --- a/libavcodec/4xm.c +++ b/libavcodec/4xm.c @@ -498,8 +498,8 @@ static int decode_i_block(FourXContext *f, int16_t *block) { int code, i, j, level, val; - if (get_bits_left(&f->gb) < 2){ - av_log(f->avctx, AV_LOG_ERROR, "%d bits left before decode_i_block()\n", get_bits_left(&f->gb)); + if (get_bits_left(&f->pre_gb) < 2) { + av_log(f->avctx, AV_LOG_ERROR, "%d bits left before decode_i_block()\n", get_bits_left(&f->pre_gb)); return AVERROR_INVALIDDATA; } |