diff options
Diffstat (limited to 'archival/bbunzip.c')
| -rw-r--r-- | archival/bbunzip.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/archival/bbunzip.c b/archival/bbunzip.c index b243afb2e..832a7bbf3 100644 --- a/archival/bbunzip.c +++ b/archival/bbunzip.c @@ -373,6 +373,15 @@ int unlzma_main(int argc UNUSED_PARAM, char **argv) static IF_DESKTOP(long long) int FAST_FUNC unpack_unxz(unpack_info_t *info UNUSED_PARAM) { + struct { + uint32_t v1; + uint16_t v2; + } magic; + xread(STDIN_FILENO, &magic, 6); + if (magic.v1 != XZ_MAGIC1a || magic.v2 != XZ_MAGIC2a) { + bb_error_msg("invalid magic"); + return -1; + } return unpack_xz_stream(STDIN_FILENO, STDOUT_FILENO); } int unxz_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |