avcodec/huffyuvdec: Check input buffer size

Fixes: Timeout
Fixes: 5487/clusterfuzz-testcase-4696837035393024

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 08c220d26cff51ca2f6896b65aebfa3accc67290)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

diff --git a/libavcodec/huffyuvdec.c b/libavcodec/huffyuvdec.c
index a700abb..4285479 100644 (file)
--- a/libavcodec/huffyuvdec.c
+++ b/libavcodec/huffyuvdec.c
@@ -913,6 +913,9 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
     AVFrame *const p = data;
     int table_size = 0, ret;
 
+    if (buf_size < (width * height + 7)/8)
+        return AVERROR_INVALIDDATA;
+
     av_fast_padded_malloc(&s->bitstream_buffer,
                    &s->bitstream_buffer_size,
                    buf_size);