Re: [Latest Git kernel/Linux-next kernel] Xorg doesn't start after the seccomp updates v5.9-rc1

On Fri, Aug 07, 2020 at 04:45:14PM +0200, Christian Zigotzky wrote:

But Xorg works on Ubuntu 10.04.4 (PowerPC 32-bit), openSUSE Tumbleweed
20190722 PPC64 and on Fedora 27 PPC64 with the latest Git kernel.

I bisected today [4].

Result: net/scm: Regularize compat handling of scm_detach_fds()
(c0029de50982c1fb215330a5f9d433cec0cfd8cc) [5] is the first bad commit.

This commit has been merged with the seccomp updates v5.9-rc1 on 2020-08-04
14:11:08 -0700 [1]. Since these updates, Xorg doesn't start anymore on some
Linux distributions.

Hi! Thanks for bisecting; yes, sorry for the trouble (I'm still trying
to understand why my compat tests _passed_...). Regardless, can you try
this patch:

https://lore.kernel.org/lkml/20200807173609.GJ4402@mussarela/ (local)

-- 
Kees Cook