fix debian bug #274301: libflac4 segfaults on corrupt flac files
diff --git a/src/libFLAC/stream_decoder.c b/src/libFLAC/stream_decoder.c
index 4b1c577..dc68710 100644
--- a/src/libFLAC/stream_decoder.c
+++ b/src/libFLAC/stream_decoder.c
@@ -2045,6 +2045,22 @@
const unsigned partitions = 1u << partition_order;
const unsigned partition_samples = partition_order > 0? decoder->private_->frame.header.blocksize >> partition_order : decoder->private_->frame.header.blocksize - predictor_order;
+ /* sanity checks */
+ if(partition_order == 0) {
+ if(decoder->private_->frame.header.blocksize < predictor_order) {
+ decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC, decoder->private_->client_data);
+ decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
+ return true;
+ }
+ }
+ else {
+ if(partition_samples < predictor_order) {
+ decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC, decoder->private_->client_data);
+ decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
+ return true;
+ }
+ }
+
if(!FLAC__format_entropy_coding_method_partitioned_rice_contents_ensure_size(partitioned_rice_contents, max(6, partition_order))) {
decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
return false;