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Date: Fri, 26 Nov 2021 14:28:24 +0300
From: "Anton V. Boyarshinov" <boyarsh@altlinux.org>
To: Sergey V Turchin <zerg@altlinux.org>
Message-ID: <20211126142824.37fc37cc@tower>
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Cc: ALT Linux Team development discussions <devel@lists.altlinux.org>
Subject: Re: [devel] kernel.userns_restrict
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=D0=92 Fri, 26 Nov 2021 14:23:35 +0300
Sergey V Turchin <zerg@altlinux.org> =D0=BF=D0=B8=D1=88=D0=B5=D1=82:

> > > # sysctl kernel.unprivileged_userns_clone
> > > sysctl: cannot stat /proc/sys/kernel/unprivileged_userns_clone: =D0=
=9D=D0=B5=D1=82 =D1=82=D0=B0=D0=BA=D0=BE=D0=B3=D0=BE
> > > =D1=84=D0=B0=D0=B9=D0=BB=D0=B0 =D0=B8=D0=BB=D0=B8 =D0=BA=D0=B0=D1=82=
=D0=B0=D0=BB=D0=BE=D0=B3=D0=B0
> > >=20
> > > # uname -r
> > > 5.10.80-std-def-alt1
> > > =D0=BD=D0=B5=D0=B4=D0=BE=D1=81=D1=82=D0=B0=D1=82=D0=BE=D1=87=D0=BD=D0=
=BE =D0=BD=D0=BE=D0=B2=D0=BE=D0=B5? =20
> >=20
> > =D0=A3 =D0=BD=D0=B0=D1=81 =D0=B8=D1=81=D0=BF=D0=BE=D0=BB=D1=8C=D0=B7=D1=
=83=D0=B5=D1=82=D1=81=D1=8F =D0=BD=D0=B5 =D1=82=D0=B0=D0=BA=D0=B0=D1=8F =D1=
=80=D0=B5=D0=B0=D0=BB=D0=B8=D0=B7=D0=B0=D1=86=D0=B8=D1=8F =D1=8D=D1=82=D0=
=BE=D0=B3=D0=BE =D0=BE=D0=B3=D1=80=D0=B0=D0=BD=D0=B8=D1=87=D0=B5=D0=BD=D0=
=B8=D1=8F, =D0=BA=D0=B0=D0=BA =D0=B2 Debian.
> > =D0=98=D0=BC=D1=8F =D0=BF=D0=B0=D1=80=D0=B0=D0=BC=D0=B5=D1=82=D1=80=D0=
=B0 =D0=B8 =D1=81=D0=BC=D1=8B=D1=81=D0=BB =D0=B5=D0=B3=D0=BE =D0=B7=D0=BD=
=D0=B0=D1=87=D0=B5=D0=BD=D0=B8=D0=B9 =D0=B4=D1=80=D1=83=D0=B3=D0=B8=D0=B5. =
=D0=A3 =D0=BD=D0=B0=D1=81 =D0=BA=D0=B0=D0=BA =D0=B2 Ubuntu. =20
> =D0=90 =D0=B3=D0=B4=D0=B5 =D1=81=D0=BC=D1=8B=D1=81=D0=BB =D0=B7=D0=BD=D0=
=B0=D1=87=D0=B5=D0=BD=D0=B8=D1=8F "=D0=B2=D0=BA=D0=BB=D1=8E=D1=87=D0=B5=D0=
=BD=D0=BE" =D0=BB=D1=83=D1=87=D1=88=D0=B5?

unprivileged_userns_clone =D0=B7=D0=B0=D0=BF=D1=80=D0=B5=D1=89=D0=B5=D0=BD=
=D1=8B unpriv userns =D0=B5=D1=81=D0=BB=D0=B8 0
userns_restrict =D0=B7=D0=B0=D0=BF=D1=80=D0=B5=D1=89=D0=B5=D0=BD=D1=8B unpr=
iv userns =D0=B5=D1=81=D0=BB=D0=B8 1

=D0=9F=D0=BE =D0=BF=D0=BE=D0=B2=D0=BE=D0=B4=D1=83 =D1=82=D0=BE=D0=B3=D0=BE =
=D0=BA=D0=B0=D0=BA=D0=BE=D0=B9 =D0=BF=D0=B0=D1=82=D1=87 =D0=B8 =D0=B8=D0=BD=
=D1=82=D0=B5=D1=80=D1=84=D0=B5=D0=B9=D1=81 =D0=BB=D1=83=D1=87=D1=88=D0=B5 =
=D0=B5=D1=81=D1=82=D1=8C =D1=80=D0=B0=D0=B7=D0=BD=D1=8B=D0=B5 =D0=BC=D0=BD=
=D0=B5=D0=BD=D0=B8=D1=8F, =D1=80=D0=B0=D0=B2=D0=BD=D0=BE
=D0=BA=D0=B0=D0=BA =D0=B8 =D0=BF=D0=BE =D0=BF=D0=BE=D0=B2=D0=BE=D0=B4=D1=83=
 =D1=82=D0=BE=D0=B3=D0=BE, =D0=BA=D0=B0=D0=BA=D0=BE=D0=B5 =D0=BF=D0=BE=D0=
=BB=D0=BE=D0=B6=D0=B5=D0=BD=D0=B8=D0=B5 =D0=BF=D1=80=D0=B0=D0=B2=D0=B8=D0=
=BB=D1=8C=D0=BD=D0=BE=D0=B5 =D0=B8 =D0=BD=D1=83=D0=B6=D0=BD=D0=BE =D0=BB=D0=
=B8 =D0=B2=D0=BE=D0=BE=D0=B1=D1=89=D0=B5
=D1=82=D0=B0=D0=BA=D0=BE=D0=B5 =D0=BE=D0=B3=D1=80=D0=B0=D0=BD=D0=B8=D1=87=
=D0=B5=D0=BD=D0=B8=D0=B5.

=D0=93=D0=BB=D0=B5=D0=B1 =D1=81=D0=B4=D0=B5=D0=BB=D0=B0=D0=BB "=D0=B3=D0=B8=
=D0=B1=D1=80=D0=B8=D0=B4=D0=BD=D1=8B=D0=B9" =D0=BF=D0=B0=D1=82=D1=87, =D0=
=BF=D0=BE=D0=B4=D0=B4=D0=B5=D1=80=D0=B6=D0=B8=D0=B2=D0=B0=D1=8E=D1=89=D0=B8=
=D0=B9 =D0=BE=D0=B1=D0=B0 =D0=B8=D0=BD=D1=82=D0=B5=D1=80=D1=84=D0=B5=D0=B9=
=D1=81=D0=B0, =D0=BD=D0=BE =D1=81=D0=BC=D1=8B=D1=81=D0=BB =D0=B2
=D0=BD=D1=91=D0=BC =D1=81=D0=BE=D0=BC=D0=BD=D0=B8=D1=82=D0=B5=D0=BB=D0=B5=
=D0=BD, =D0=BA =D1=82=D0=BE=D0=BC=D1=83 =D0=B6=D0=B5 =D0=B5=D1=81=D0=BB=D0=
=B8 =D0=BE=D0=B4=D0=B8=D0=BD sysctl =D0=B1=D1=83=D0=B4=D0=B5=D1=82 =D0=B7=
=D0=B0=D0=BE=D0=B4=D0=BD=D0=BE =D0=BF=D0=B5=D1=80=D0=B5=D0=BA=D0=BB=D1=8E=
=D1=87=D0=B0=D1=82=D1=8C
=D0=B4=D1=80=D1=83=D0=B3=D0=BE=D0=B9, =D0=BF=D1=80=D0=B8=D1=87=D1=91=D0=BC =
=D0=B2 =D0=B4=D1=80=D1=83=D0=B3=D1=83=D1=8E =D1=81=D1=82=D0=BE=D1=80=D0=BE=
=D0=BD=D1=83 -- =D0=BF=D1=83=D1=82=D0=B0=D0=BD=D0=B8=D1=86=D1=8B, =D0=B1=D0=
=BE=D1=8E=D1=81=D1=8C, =D1=81=D1=82=D0=B0=D0=BD=D0=B5=D1=82 =D1=82=D0=BE=D0=
=BB=D1=8C=D0=BA=D0=BE
=D0=B1=D0=BE=D0=BB=D1=8C=D1=88=D0=B5..