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-rw-r--r--libavcodec/alsdec.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/libavcodec/alsdec.c b/libavcodec/alsdec.c
index 842fc7dc76..a7e58a242f 100644
--- a/libavcodec/alsdec.c
+++ b/libavcodec/alsdec.c
@@ -767,6 +767,11 @@ static int read_var_block_data(ALSDecContext *ctx, ALSBlockData *bd)
r = get_unary(gb, 0, 4);
c = get_bits(gb, 2);
+ if (r >= 4) {
+ av_log(avctx, AV_LOG_ERROR, "r overflow\n");
+ return AVERROR_INVALIDDATA;
+ }
+
bd->ltp_gain[2] = ltp_gain_values[r][c];
bd->ltp_gain[3] = decode_rice(gb, 2) << 3;