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-rw-r--r--libavcodec/alsdec.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/libavcodec/alsdec.c b/libavcodec/alsdec.c
index 787792f2bc..7c652af9d3 100644
--- a/libavcodec/alsdec.c
+++ b/libavcodec/alsdec.c
@@ -1290,8 +1290,16 @@ static int revert_channel_correlation(ALSDecContext *ctx, ALSBlockData *bd,
if (ch[dep].time_diff_sign) {
t = -t;
+ if (t > 0 && begin < t) {
+ av_log(ctx->avctx, AV_LOG_ERROR, "begin %u smaller than time diff index %d.\n", begin, t);
+ return AVERROR_INVALIDDATA;
+ }
begin -= t;
} else {
+ if (t > 0 && end < t) {
+ av_log(ctx->avctx, AV_LOG_ERROR, "end %u smaller than time diff index %d.\n", end, t);
+ return AVERROR_INVALIDDATA;
+ }
end -= t;
}