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 <[email protected]>
>> Signed-off-by: Zhangfei Gao <[email protected]>
>> ---
>> 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.