Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Message-ID: <fb7ec4d4ed78e6ae7fa6c04abb24d1c00dc2b0f7.camel@perches.com>
Subject: Re: [Linux-kernel-mentees] [PATCH net] rds: Prevent kernel-infoleak
 in rds_notify_queue_get()
From:   Joe Perches <joe@perches.com>
To:     Jason Gunthorpe <jgg@ziepe.ca>, Leon Romanovsky <leon@kernel.org>
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Peilin Ye <yepeilin.cs@gmail.com>,
        Santosh Shilimkar <santosh.shilimkar@oracle.com>,
        "David S. Miller" <davem@davemloft.net>,
        Jakub Kicinski <kuba@kernel.org>,
        Dan Carpenter <dan.carpenter@oracle.com>,
        Arnd Bergmann <arnd@arndb.de>,
        linux-kernel-mentees@lists.linuxfoundation.org,
        netdev@vger.kernel.org, linux-rdma@vger.kernel.org,
        rds-devel@oss.oracle.com, linux-kernel@vger.kernel.org
Date:   Sun, 02 Aug 2020 15:23:58 -0700
In-Reply-To: <20200802221020.GN24045@ziepe.ca>
References: <20200730192026.110246-1-yepeilin.cs@gmail.com>
         <20200731045301.GI75549@unreal> <20200731053306.GA466103@kroah.com>
         <20200731053333.GB466103@kroah.com> <20200731140452.GE24045@ziepe.ca>
         <20200731142148.GA1718799@kroah.com> <20200731143604.GF24045@ziepe.ca>
         <20200731171924.GA2014207@kroah.com> <20200801053833.GK75549@unreal>
         <20200802221020.GN24045@ziepe.ca>
Content-Type: text/plain; charset="ISO-8859-1"
User-Agent: Evolution 3.36.3-0ubuntu1 
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On Sun, 2020-08-02 at 19:10 -0300, Jason Gunthorpe wrote:
> On Sat, Aug 01, 2020 at 08:38:33AM +0300, Leon Romanovsky wrote:
> 
> > I'm using {} instead of {0} because of this GCC bug.
> > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53119
> 
> This is why the {} extension exists..

There is no guarantee that the gcc struct initialization {}
extension also zeros padding.