linux-kernel - Re: [PATCH 1/1] RDMA/core: Don't copy uninitialized stack memory to userspace

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Message-ID: <844cee99-5f52-3110-02b2-60b205f1a189@amazon.com>
Date:   Tue, 9 Jun 2020 12:20:57 +0300
From:   Gal Pressman <galpress@...zon.com>
To:     Xidong Wang <wangxidong_97@....com>
CC:     Doug Ledford <dledford@...hat.com>, Jason Gunthorpe <jgg@...pe.ca>,
        "Yishai Hadas" <yishaih@...lanox.com>,
        Leon Romanovsky <leon@...nel.org>,
        Max Gurtovoy <maxg@...lanox.com>,
        Maor Gottlieb <maorg@...lanox.com>,
        <linux-rdma@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/1] RDMA/core: Don't copy uninitialized stack memory to
 userspace

On 09/06/2020 11:40, Xidong Wang wrote:
> From: xidongwang <wangxidong_97@....com>
> 
> ib_uverbs_create_ah() may copy stack allocated
> structs to userspace without initializing all members of these
> structs. Clear out this memory to prevent information leaks.

Which members are not initialized?