Re: [PATCH RFC] mm: Add an fs-write seal to memfd

[Joel Fernandes]

On Fri, Oct 5, 2018 at 3:28 PM, Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
> On Fri, Oct 05, 2018 at 02:10:58PM -0700, Joel Fernandes wrote:
>> On Fri, Oct 05, 2018 at 12:53:39PM -0700, Andrew Morton wrote:
>> > On Fri,  5 Oct 2018 12:27:27 -0700 "Joel Fernandes (Google)" <joel@xxxxxxxxxxxxxxxxx> wrote:
>> >
>> > > To support the usecase, this patch adds a new F_SEAL_FS_WRITE seal which
>> > > prevents any future mmap and write syscalls from succeeding while
>> > > keeping the existing mmap active. The following program shows the seal
>> > > working in action:
>> >
>> > Please be prepared to create a manpage patch for this one.
>>
>> Sure, I will do that. thanks,
>
> And a test case to the in-kernel memfd tests would be appreciated.


Sure, I will do add to those self-tests.

thanks,

 - Joel