diff options
Diffstat (limited to 'src/liblzma/common/lzip_decoder.c')
| -rw-r--r-- | src/liblzma/common/lzip_decoder.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/src/liblzma/common/lzip_decoder.c b/src/liblzma/common/lzip_decoder.c index 20794f94..58c08674 100644 --- a/src/liblzma/common/lzip_decoder.c +++ b/src/liblzma/common/lzip_decoder.c @@ -262,7 +262,11 @@ lzip_decode(void *coder_ptr, const lzma_allocator *allocator, coder->member_size += *in_pos - in_start; coder->uncompressed_size += out_used; - if (!coder->ignore_check) + // Don't update the CRC32 if the integrity check will be + // ignored or if there was no new output. The latter is + // important in case out == NULL to avoid null pointer + 0 + // which is undefined behavior. + if (!coder->ignore_check && out_used > 0) coder->crc32 = lzma_crc32(out + out_start, out_used, coder->crc32); |