diff options
Diffstat (limited to 'contrib/xz/src/liblzma/common/block_header_decoder.c')
| -rw-r--r-- | contrib/xz/src/liblzma/common/block_header_decoder.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/contrib/xz/src/liblzma/common/block_header_decoder.c b/contrib/xz/src/liblzma/common/block_header_decoder.c index 2c9573e..1dd982f 100644 --- a/contrib/xz/src/liblzma/common/block_header_decoder.c +++ b/contrib/xz/src/liblzma/common/block_header_decoder.c @@ -15,7 +15,7 @@ static void -free_properties(lzma_block *block, lzma_allocator *allocator) +free_properties(lzma_block *block, const lzma_allocator *allocator) { // Free allocated filter options. The last array member is not // touched after the initialization in the beginning of @@ -32,7 +32,7 @@ free_properties(lzma_block *block, lzma_allocator *allocator) extern LZMA_API(lzma_ret) lzma_block_header_decode(lzma_block *block, - lzma_allocator *allocator, const uint8_t *in) + const lzma_allocator *allocator, const uint8_t *in) { // NOTE: We consider the header to be corrupt not only when the // CRC32 doesn't match, but also when variable-length integers @@ -46,8 +46,16 @@ lzma_block_header_decode(lzma_block *block, block->filters[i].options = NULL; } - // Always zero for now. - block->version = 0; + // Versions 0 and 1 are supported. If a newer version was specified, + // we need to downgrade it. + if (block->version > 1) + block->version = 1; + + // This isn't a Block Header option, but since the decompressor will + // read it if version >= 1, it's better to initialize it here than + // to expect the caller to do it since in almost all cases this + // should be false. + block->ignore_check = false; // Validate Block Header Size and Check type. The caller must have // already set these, so it is a programming error if this test fails. |
