diff options
| -rw-r--r-- | src/liblzma/common/block_header_decoder.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/liblzma/common/block_header_decoder.c b/src/liblzma/common/block_header_decoder.c index 2e1135d..060479b 100644 --- a/src/liblzma/common/block_header_decoder.c +++ b/src/liblzma/common/block_header_decoder.c @@ -39,6 +39,10 @@ lzma_block_header_decode(lzma_block *block, // are invalid or over 63 bits, or if the header is too small // to contain the claimed information. + // Catch unexpected NULL pointers. + if (block == NULL || block->filters == NULL || in == NULL) + return LZMA_PROG_ERROR; + // Initialize the filter options array. This way the caller can // safely free() the options even if an error occurs in this function. for (size_t i = 0; i <= LZMA_FILTERS_MAX; ++i) { |