diff options
Diffstat (limited to 'libarchive/archive_read_support_format_7zip.c')
| -rw-r--r-- | libarchive/archive_read_support_format_7zip.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/libarchive/archive_read_support_format_7zip.c b/libarchive/archive_read_support_format_7zip.c index 87c6c5272197..6ce9d1a0e1bb 100644 --- a/libarchive/archive_read_support_format_7zip.c +++ b/libarchive/archive_read_support_format_7zip.c @@ -1086,10 +1086,17 @@ init_decompression(struct archive_read *a, struct _7zip *zip, zip->bcj_state = 0; break; case _7Z_DELTA: + if (coder2->propertiesSize != 1) { + archive_set_error(&a->archive, + ARCHIVE_ERRNO_MISC, + "Invalid Delta parameter"); + return (ARCHIVE_FAILED); + } filters[fi].id = LZMA_FILTER_DELTA; memset(&delta_opt, 0, sizeof(delta_opt)); delta_opt.type = LZMA_DELTA_TYPE_BYTE; - delta_opt.dist = 1; + delta_opt.dist = + (uint32_t)coder2->properties[0] + 1; filters[fi].options = &delta_opt; fi++; break; |