diff mbox series

[FFmpeg-devel,3/3] avcodec/leaddec: Check remaining bits in decode_block()

Message ID 20231215014828.8115-3-michael@niedermayer.cc
State Accepted
Commit d909d8e5e0fbce42ecb10ee6e73def1f1e42ece4
Headers show
Series [FFmpeg-devel,1/3] tools/target_dec_fuzzer: Adjust threshold for QPEG | expand

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Commit Message

Michael Niedermayer Dec. 15, 2023, 1:48 a.m. UTC 
Fixes: Timeout
Fixes: 64163/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_LEAD_fuzzer-6418925835124736

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

Patch

diff --git a/libavcodec/leaddec.c b/libavcodec/leaddec.c
index ede52fba5a9..4e97479b03c 100644
--- a/libavcodec/leaddec.c
+++ b/libavcodec/leaddec.c
@@ -104,6 +104,9 @@  static int decode_block(LeadContext * s, GetBitContext * gb,
 
     s->bdsp.clear_block(block);
 
+    if (get_bits_left(gb) <= 0)
+        return AVERROR_INVALIDDATA;
+
     size = get_vlc2(gb, dc_table, dc_bits, 1);
     if (size < 0)
         return AVERROR_INVALIDDATA;