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flac/encode.c: Limit padding size

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This prevents a too large padding value overflowing the block length.

Patch-from: lvqcl <lvqcl.mail@gmail.com>
Closes: https://sourceforge.net/p/flac/bugs/284/
This commit is contained in:
Erik de Castro Lopo
2016-01-09 10:35:23 +11:00
parent 1a5ba624a2
commit 27e00c8be0
1 changed files with 2 additions and 0 deletions
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2
src/flac/encode.c
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@@ -2012,6 +2012,7 @@ FLAC__bool EncoderSession_init_encoder(EncoderSession *e, encode_options_t optio
p = e->total_samples_to_encode / sample_rate < 20*60? FLAC_ENCODE__DEFAULT_PADDING : FLAC_ENCODE__DEFAULT_PADDING*8;
if(p > 0)
p += (e->replay_gain ? GRABBAG__REPLAYGAIN_MAX_TAG_SPACE_REQUIRED : 0);
p = min(p, (int)((1u << FLAC__STREAM_METADATA_LENGTH_LEN) - 1));
if(options.padding != 0) {
if(p > 0 && flac_decoder_data->num_metadata_blocks < sizeof(flac_decoder_data->metadata_blocks)/sizeof(flac_decoder_data->metadata_blocks[0])) {
flac_decoder_data->metadata_blocks[flac_decoder_data->num_metadata_blocks] = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING);
@@ -2069,6 +2070,7 @@ FLAC__bool EncoderSession_init_encoder(EncoderSession *e, encode_options_t optio
padding.is_last = false; /* the encoder will set this for us */
padding.type = FLAC__METADATA_TYPE_PADDING;
padding.length = (unsigned)(options.padding>0? options.padding : (e->total_samples_to_encode / sample_rate < 20*60? FLAC_ENCODE__DEFAULT_PADDING : FLAC_ENCODE__DEFAULT_PADDING*8)) + (e->replay_gain ? GRABBAG__REPLAYGAIN_MAX_TAG_SPACE_REQUIRED : 0);
padding.length = min(padding.length, (1u << FLAC__STREAM_METADATA_LENGTH_LEN) - 1);
static_metadata_append(&static_metadata, &padding, /*needs_delete=*/false);
}
metadata = static_metadata.metadata;