cifs: free nativeFileSystem field before allocating a new one

commit 90a98b2f3f3647fb17667768a348b2b219f2a9f7 upstream.

...otherwise, we'll leak this memory if we have to reconnect (e.g. after
network failure).

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 4aa81a507b741110657eeb1e7899235296d829d8..1dc14f219adaaccd537cc4ef1bac652df01574cb 100644 (file)
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -2745,6 +2745,7 @@ CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
                strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
 
                /* mostly informational -- no need to fail on error here */
+               kfree(tcon->nativeFileSystem);
                tcon->nativeFileSystem = cifs_strndup_from_ucs(bcc_ptr,
                                                      bytes_left, is_unicode,
                                                      nls_codepage);