From: Andreas Cadhalpun <[email protected]>

If in compression mode rice_limit = 0 leads to call
`show_bits(gb, k)` in `decode_scalar` with k = 0.

Request a sample in case it is valid and it should be accepted.

Signed-off-by: Luca Barbato <[email protected]>

CC: [email protected]
---
 libavcodec/alac.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/libavcodec/alac.c b/libavcodec/alac.c
index 48903a6..9579e18 100644
--- a/libavcodec/alac.c
+++ b/libavcodec/alac.c
@@ -307,6 +307,12 @@ static int decode_element(AVCodecContext *avctx, AVFrame 
*frame, int ch_index,
         int lpc_quant[2];
         int rice_history_mult[2];
 
+        if (!alac->rice_limit) {
+            avpriv_request_sample(alac->avctx,
+                                  "Compression with rice limit 0");
+            return AVERROR(ENOSYS);
+        }
+
         decorr_shift       = get_bits(&alac->gb, 8);
         decorr_left_weight = get_bits(&alac->gb, 8);
 
-- 
1.9.0

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