Re: [PATCH v3 4/7] selftests: add memfd_create() + sealing tests

[David Herrmann]

Hi

On Wed, Jul 16, 2014 at 12:07 PM, Hugh Dickins <hughd@xxxxxxxxxx> wrote:
> On Fri, 13 Jun 2014, David Herrmann wrote:
>
>> Some basic tests to verify sealing on memfds works as expected and
>> guarantees the advertised semantics.
>>
>> Signed-off-by: David Herrmann <dh.herrmann@xxxxxxxxx>
>
> Thanks for whatever the fix was, I didn't hit any problem running
> this version repeatedly, on 64-bit and on 32-bit.

glibc does pid-caching so getpid() can be skipped once called. fork()
and clone() have to update it, though. Therefore, you shouldn't mix
fork() and clone() in the same process. I replaced my fork() call with
a simple clone() and the bug was gone.

Thanks
David
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/