smb: client: fix smbdirect_recv_io leak in smbd_negotiate() error path

[ Upstream commit daac51c ]

During tests of another unrelated patch I was able to trigger this
error: Objects remaining on __kmem_cache_shutdown()

Cc: Steve French <[email protected]>
Cc: Tom Talpey <[email protected]>
Cc: Long Li <[email protected]>
Cc: Namjae Jeon <[email protected]>
Cc: [email protected]
Cc: [email protected]
Fixes: f198186 ("CIFS: SMBD: Establish SMB Direct connection")
Signed-off-by: Stefan Metzmacher <[email protected]>
Signed-off-by: Steve French <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>

Author: metze-samba

fs/smb/client/smbdirect.c

@@ -1084,8 +1084,10 @@ static int smbd_negotiate(struct smbd_connection *info)
 	log_rdma_event(INFO, "smbd_post_recv rc=%d iov.addr=0x%llx iov.length=%u iov.lkey=0x%x\n",
 		       rc, response->sge.addr,
 		       response->sge.length, response->sge.lkey);
-	if (rc)
+	if (rc) {
+		put_receive_buffer(info, response);
 		return rc;
+	}
 
 	init_completion(&info->negotiate_completion);
 	info->negotiate_done = false;