[PATCH v2] uacce: unmap remaining mmapping from user space

[zhangfei]

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.