[PATCH v2] uacce: unmap remaining mmapping from user space
zhangfei.gao at linaro.org
Fri Mar 6 13:36:52 AEDT 2020
On 2020/3/6 上午9:51, Herbert Xu wrote:
> 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 at intel.com>
>> Signed-off-by: Zhangfei Gao <zhangfei.gao at 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.
Thanks Herbert for the help.
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