dpkg: fix buffer overflow (bug 983)

1 files changed, 4 insertions, 2 deletions

diff --git a/archival/dpkg.c b/archival/dpkg.c
index 0e5772062..ac4683398 100644
--- a/archival/dpkg.c
+++ b/archival/dpkg.c
@@ -1522,6 +1522,7 @@ static void unpack_package(deb_file_t *deb_file)
         const unsigned int status_num = search_status_hashtable(package_name);
         const unsigned int status_package_num = status_hashtable[status_num]->package;
         char *info_prefix;
+        char *list_filename;
         archive_handle_t *archive_handle;
         FILE *out_stream;
         llist_t *accept_list = NULL;
@@ -1570,8 +1571,8 @@ static void unpack_package(deb_file_t *deb_file)
         unpack_ar_archive(archive_handle);
 
         /* Create the list file */
-        strcat(info_prefix, "list");
-        out_stream = xfopen(info_prefix, "w");
+        list_filename = bb_xasprintf("/var/lib/dpkg/info/%s.list", package_name);
+        out_stream = bb_xfopen(list_filename, "w");
         while (archive_handle->sub_archive->passed) {
                 /* the leading . has been stripped by data_extract_all_prefix already */
                 fputs(archive_handle->sub_archive->passed->data, out_stream);
@@ -1585,6 +1586,7 @@ static void unpack_package(deb_file_t *deb_file)
         set_status(status_num, "unpacked", 3);
 
         free(info_prefix);
+        free(list_filename);
 }
 
 static void configure_package(deb_file_t *deb_file)