Fix possible access to undefined memory region.

Signed-off-by: Igor Mammedov <niallain@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>

diff --git a/fs/cifs/dns_resolve.c b/fs/cifs/dns_resolve.c
index 939e256..f730ef3 100644 (file)
--- a/fs/cifs/dns_resolve.c
+++ b/fs/cifs/dns_resolve.c
@@ -134,10 +134,6 @@ dns_resolve_server_name_to_ip(const char *unc, char **ip_addr)
        rkey = request_key(&key_type_dns_resolver, name, "");
        if (!IS_ERR(rkey)) {
                data = rkey->payload.data;
-               cFYI(1, ("%s: resolved: %s to %s", __func__,
-                                       rkey->description,
-                                       *ip_addr
-                               ));
        } else {
                cERROR(1, ("%s: unable to resolve: %s", __func__, name));
                goto out;
@@ -150,6 +146,11 @@ skip_upcall:
                if (*ip_addr) {
                        memcpy(*ip_addr, data, len);
                        (*ip_addr)[len] = '\0';
+                       if (!IS_ERR(rkey))
+                               cFYI(1, ("%s: resolved: %s to %s", __func__,
+                                                       name,
+                                                       *ip_addr
+                                       ));
                        rc = 0;
                } else {
                        rc = -ENOMEM;