svn commit: r362769 - in head/sys: amd64/linux amd64/linux32 arm64/linux compat/linux i386/linux

[Shawn Webb]

Hey Kyle,

On Mon, Jun 29, 2020 at 03:09:14AM +0000, Kyle Evans wrote:
> Author: kevans
> Date: Mon Jun 29 03:09:14 2020
> New Revision: 362769
> URL: https://svnweb.freebsd.org/changeset/base/362769
> 
> Log:
>   linuxolator: implement memfd_create syscall
>   
>   This effectively mirrors our libc implementation, but with minor fudging --
>   name needs to be copied in from userspace, so we just copy it straight into
>   stack-allocated memfd_name into the correct position rather than allocating
>   memory that needs to be cleaned up.
>   
>   The sealing-related fcntl(2) commands, F_GET_SEALS and F_ADD_SEALS, have
>   also been implemented now that we support them.
>   
>   Note that this implementation is still not quite at feature parity w.r.t.
>   the actual Linux version; some caveats, from my foggy memory:
>   
>   - Need to implement SHM_GROW_ON_WRITE, default for memfd (in progress)
>   - LTP wants the memfd name exposed to fdescfs
>   - Linux allows open() of an fdescfs fd with O_TRUNC to truncate after dup.
>     (?)
>   
>   Interested parties can install and run LTP from ports (devel/linux-ltp) to
>   confirm any fixes.
>   
>   PR:		240874
>   Reviewed by:	kib, trasz
>   Differential Revision:	https://reviews.freebsd.org/D21845

RELNOTES?

> 
> Modified:
>   head/sys/amd64/linux/linux_dummy.c
>   head/sys/amd64/linux32/linux32_dummy.c
>   head/sys/arm64/linux/linux_dummy.c
>   head/sys/compat/linux/linux.c
>   head/sys/compat/linux/linux.h
>   head/sys/compat/linux/linux_file.c
>   head/sys/compat/linux/linux_file.h
>   head/sys/i386/linux/linux_dummy.c

Should __FreeBSD_version be bumped?

Thanks,

-- 
Shawn Webb
Cofounder / Security Engineer
HardenedBSD

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