From: Herbert Xu <herbert@gondor.apana.org.au>
To: Zhangfei Gao <zhangfei.gao@linaro.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Arnd Bergmann <arnd@arndb.de>,
jonathan.cameron@huawei.com, dave.jiang@intel.com,
grant.likely@arm.com, jean-philippe <jean-philippe@linaro.org>,
Jerome Glisse <jglisse@redhat.com>,
ilias.apalodimas@linaro.org, francois.ozog@linaro.org,
kenneth-lee-2012@foxmail.com, Wangzhou <wangzhou1@hisilicon.com>,
"haojian . zhuang" <haojian.zhuang@linaro.org>,
guodong.xu@linaro.org, linux-accelerators@lists.ozlabs.org,
linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org,
iommu@lists.linux-foundation.org
Subject: Re: [PATCH v2] uacce: unmap remaining mmapping from user space
Date: Fri, 6 Mar 2020 12:51:21 +1100 [thread overview]
Message-ID: <20200306015121.GH30653@gondor.apana.org.au> (raw)
In-Reply-To: <1582701126-5312-1-git-send-email-zhangfei.gao@linaro.org>
On Wed, Feb 26, 2020 at 03:12:06PM +0800, Zhangfei Gao wrote:
> When uacce parent device module is removed, user app may
> still keep the mmaped area, which can be accessed unsafely.
> When rmmod, Parent device driver will call uacce_remove,
> which unmap all remaining mapping from user space for safety.
> VM_FAULT_SIGBUS is also reported to user space accordingly.
>
> Suggested-by: Dave Jiang <dave.jiang@intel.com>
> Signed-off-by: Zhangfei Gao <zhangfei.gao@linaro.org>
> ---
> v2: Unmap before put_queue, where memory is freed, commented from Zaibo.
>
> drivers/misc/uacce/uacce.c | 16 ++++++++++++++++
> include/linux/uacce.h | 2 ++
> 2 files changed, 18 insertions(+)
Patch applied. Thanks.
--
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
next prev parent reply other threads:[~2020-03-06 1:51 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-26 7:12 Zhangfei Gao
2020-03-06 1:51 ` Herbert Xu [this message]
2020-03-06 2:36 ` zhangfei
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