[FFmpeg-devel] [PATCH] avcodec/aic: Check remaining bits in aic_decode_coeffs()

[Michael Niedermayer]

Fixes: Timeout (78 seconds -> 2 seconds)
Fixes: 13186/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_AIC_fuzzer-5639516533030912

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
---
 libavcodec/aic.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libavcodec/aic.c b/libavcodec/aic.c
index 9c6f806655..dc28c83661 100644
--- a/libavcodec/aic.c
+++ b/libavcodec/aic.c
@@ -208,6 +208,9 @@ static int aic_decode_coeffs(GetBitContext *gb, int16_t *dst,
     int mb, idx;
     unsigned val;
 
+    if (get_bits_left(gb) < 5)
+        return AVERROR_INVALIDDATA;
+
     has_skips  = get_bits1(gb);
     coeff_type = get_bits1(gb);
     coeff_bits = get_bits(gb, 3);
-- 
2.20.1