unix_parse_response: add a safety check

* socketutils.c (unix_parse_response): Check that netlink message
is large enough to contain a unix_diag_msg structure.

diff --git a/socketutils.c b/socketutils.c
index 2f4a9b03c9f75edc994a3704b26c53905dd92b58..67fc1ee7fad4f80ce81f95f9c90f7a8e048cb8f2 100644 (file)
--- a/socketutils.c
+++ b/socketutils.c
@@ -245,6 +245,8 @@ unix_parse_response(const char *proto_name, const void *data, int data_len,
        size_t path_len = 0;
        char path[UNIX_PATH_MAX + 1];
 
+       if (rta_len < 0)
+               return false;
        if (diag_msg->udiag_ino != inode)
                return false;
        if (diag_msg->udiag_family != AF_UNIX)