diff options
| -rw-r--r-- | tools/libxc/xc_dom_core.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/tools/libxc/xc_dom_core.c b/tools/libxc/xc_dom_core.c index 3cbf9f791e..f8d1b08ba8 100644 --- a/tools/libxc/xc_dom_core.c +++ b/tools/libxc/xc_dom_core.c @@ -284,6 +284,11 @@ size_t xc_dom_check_gzip(xc_interface *xch, void *blob, size_t ziplen) unsigned char *gzlen; size_t unziplen; + if ( ziplen < 6 ) + /* Too small. We need (i.e. the subsequent code relies on) + * 2 bytes for the magic number plus 4 bytes length. */ + return 0; + if ( strncmp(blob, "\037\213", 2) ) /* not gzipped */ return 0; |