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Date: Thu, 18 Nov 2021 15:41:13 +0300
From: Arseny Maslennikov <arseny@altlinux.org>
To: ALT Linux Team development discussions <devel@lists.altlinux.org>
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Subject: Re: [devel] kernel.userns_restrict
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On Thu, Nov 18, 2021 at 12:32:19PM +0000, Vladimir D. Seleznev wrote:
> On Thu, Nov 18, 2021 at 03:21:39PM +0300, Anton Farygin wrote:
> > =D0=90 =D1=87=D0=B5=D0=BC =D1=82=D0=B0=D0=BA =D0=BF=D0=BB=D0=BE=D1=85=
=D0=B8 userns =D0=B8 =D0=B7=D0=B0 =D1=87=D1=82=D0=BE =D0=BC=D1=8B =D0=B1=D0=
=BE=D1=80=D0=B5=D0=BC=D1=81=D1=8F, =D0=BC=D0=BE=D0=B6=D0=BD=D0=BE =D1=80=D0=
=B0=D1=81=D1=81=D0=BA=D0=B0=D0=B7=D0=B0=D1=82=D1=8C ?
(=D0=A1=D1=80=D0=B0=D0=B7=D1=83 =D1=81=D0=BA=D0=B0=D0=B6=D1=83: =D1=8F =D0=
=BD=D0=B5 =D0=B7=D0=B0 =D0=BA=D0=B0=D0=BA=D1=83=D1=8E-=D0=BB=D0=B8=D0=B1=D0=
=BE =D0=B8=D0=B7 =D1=82=D0=BE=D1=87=D0=B5=D0=BA =D0=B7=D1=80=D0=B5=D0=BD=D0=
=B8=D1=8F, =D0=B0 =D0=B7=D0=B0 =D0=BE=D0=B1=D1=8A=D0=B5=D0=BA=D1=82=D0=B8=
=D0=B2=D0=BD=D0=BE=D0=B5
=D1=82=D0=B5=D0=BA=D1=83=D1=89=D0=B5=D0=B5 =D0=BF=D0=BE=D0=BB=D0=BE=D0=B6=
=D0=B5=D0=BD=D0=B8=D0=B5 =D0=B4=D0=B5=D0=BB, =D0=BF=D1=80=D0=B5=D0=B4=D0=BC=
=D0=B5=D1=82=D0=BD=D1=8B=D0=B9 =D1=80=D0=B0=D0=B7=D0=B3=D0=BE=D0=B2=D0=BE=
=D1=80 =D0=B8 =D1=80=D0=BE=D0=B6=D0=B4=D0=B5=D0=BD=D0=B8=D0=B5 =D0=B8=D1=81=
=D1=82=D0=B8=D0=BD=D1=8B =D0=B2 =D1=81=D0=BF=D0=BE=D1=80=D0=B5.)
> =D0=A2=D0=B5=D0=BC, =D1=87=D1=82=D0=BE =D1=8D=D1=82=D0=BE =D1=82=D0=B0=D0=
=BA=D0=BE=D0=B9 =D0=B0=D0=BD=D1=82=D0=B8=D1=85=D0=B0=D1=80=D0=B4=D0=B5=D0=
=BD=D0=B8=D0=BD=D0=B3? =D0=AE=D0=B7=D0=B5=D1=80=D0=BD=D1=81 =D0=BF=D1=80=D0=
=B5=D0=B4=D0=BE=D1=81=D1=82=D0=B0=D0=B2=D0=BB=D1=8F=D0=B5=D1=82 =D0=BF=D0=
=BE=D0=BB=D0=BD=D1=8B=D0=B9 =D0=BD=D0=B0=D0=B1=D0=BE=D1=80
> capabilities =D0=BD=D0=B5=D0=BF=D1=80=D0=B8=D0=B2=D0=B8=D0=BB=D0=B5=D0=B3=
=D0=B8=D1=80=D0=BE=D0=B2=D0=B0=D0=BD=D0=BD=D0=BE=D0=BC=D1=83 =D0=BF=D0=BE=
=D0=BB=D1=8C=D0=B7=D0=BE=D0=B2=D0=B0=D1=82=D0=B5=D0=BB=D1=8E. =D0=97=D0=B0=
=D1=8F=D0=B2=D0=BB=D1=8F=D0=B5=D1=82=D1=81=D1=8F, =D1=87=D1=82=D0=BE =D0=B2=
=D0=BD=D1=83=D0=B6=D0=BD=D1=8B=D1=85
> =D0=BC=D0=B5=D1=81=D1=82=D0=B0=D1=85 =D0=B2 =D1=8F=D0=B4=D1=80=D0=B5 =D0=
=B5=D1=81=D1=82=D1=8C =D0=BF=D1=80=D0=BE=D0=B2=D0=B5=D1=80=D0=BA=D0=B8 =D0=
=BD=D0=B0 =D0=BD=D0=B5=D0=BA=D0=BE=D1=80=D0=BD=D0=B5=D0=B2=D0=BE=D0=B9 user=
ns, =D0=BD=D0=BE =D0=BF=D1=80=D0=B0=D0=BA=D1=82=D0=B8=D0=BA=D0=B0
> =D0=BD=D0=B5=D0=BE=D0=B4=D0=BD=D0=BE=D0=BA=D1=80=D0=B0=D1=82=D0=BD=D0=BE =
=D0=BF=D0=BE=D0=BA=D0=B0=D0=B7=D1=8B=D0=B2=D0=B0=D0=B5=D1=82, =D1=87=D1=82=
=D0=BE =D1=8D=D1=82=D0=B8=D1=85 =D0=BC=D0=B5=D1=81=D1=82 =D1=81=D1=82=D0=B0=
=D0=BD=D0=BE=D0=B2=D0=B8=D1=82=D1=81=D1=8F =D0=B2=D1=81=D1=91 =D0=B1=D0=BE=
=D0=BB=D1=8C=D1=88=D0=B5, =D1=81 =D0=BE=D0=B4=D0=BD=D0=BE=D0=B9
> =D1=81=D1=82=D0=BE=D1=80=D0=BE=D0=BD=D1=8B, =D0=B0 =D1=81 =D0=B4=D1=80=D1=
=83=D0=B3=D0=BE=D0=B9 =D1=81=D1=82=D0=BE=D1=80=D0=BE=D0=BD=D1=8B =D0=B2 =D0=
=B4=D1=80=D1=83=D0=B3=D0=B8=D1=85 =D0=BC=D0=B5=D1=81=D1=82=D0=B0=D1=85, =D1=
=82=D1=80=D0=B5=D0=B1=D1=83=D1=8E=D1=89=D0=B8=D1=85 =D0=BF=D1=80=D0=B8=D0=
=B2=D0=B8=D0=BB=D0=B5=D0=B3=D0=B8=D0=B9,
> =D0=BD=D0=B5=D1=80=D0=B5=D0=B4=D0=BA=D0=BE =D0=BD=D0=B0=D0=BB=D0=B8=D1=87=
=D0=B8=D1=81=D1=82=D0=B2=D1=83=D1=8E=D1=82 =D0=B4=D1=80=D1=83=D0=B3=D0=B8=
=D0=B5 =D0=BE=D0=B3=D1=80=D0=B5=D1=85=D0=B8 =D0=B1=D0=B5=D0=B7=D0=BE=D0=BF=
=D0=B0=D1=81=D0=BD=D0=BE=D1=81=D1=82=D0=B8, =D0=BA=D0=BE=D1=82=D0=BE=D1=80=
=D1=8B=D1=85 =D0=B1=D0=B5=D0=B7 userns =D0=B1=D1=8B=D0=BB=D0=BE
> =D0=B1=D1=8B =D0=BD=D0=B5=D0=B2=D0=BE=D0=B7=D0=BC=D0=BE=D0=B6=D0=BD=D0=BE=
=D1=8D=D0=BA=D1=81=D0=BF=D0=BB=D1=83=D0=B0=D1=82=D0=B8=D1=80=D0=BE=D0=B2=
=D0=B0=D1=82=D1=8C, =D1=82.=D0=BA. =D0=B8=D1=85 =D1=8D=D0=BA=D1=81=D0=BF=D0=
=BB=D1=83=D0=B0=D1=82=D0=B0=D1=86=D0=B8=D1=8F =D1=82=D1=80=D0=B5=D0=B1=D0=
=BE=D0=B2=D0=B0=D0=BB=D0=BE =D1=8F=D0=B2=D0=BD=D1=8B=D1=85
> =D0=BF=D1=80=D0=B8=D0=B2=D0=B8=D0=BB=D0=B5=D0=B3=D0=B8=D0=B9.
% MANWIDTH=3D56 man user_namespaces | head -n 30 | tail -n -20
User namespaces isolate security-related iden=E2=80=90
tifiers and attributes, in particular, user IDs
and group IDs (see credentials(7)), the root
directory, keys (see keyrings(7)), and capabil=E2=80=90
ities (see capabilities(7)). A process's user
and group IDs can be different inside and out=E2=80=90
=D0=92 =D0=BF=D0=B5=D1=80=D0=B2=D0=BE=D0=BC =D0=BF=D1=80=D0=BE=D1=86=D0=B8=
=D1=82=D0=B8=D1=80=D0=BE=D0=B2=D0=B0=D0=BD=D0=BD=D0=BE=D0=BC =D0=BF=D1=80=
=D0=B5=D0=B4=D0=BB=D0=BE=D0=B6=D0=B5=D0=BD=D0=B8=D0=B8 =D0=BB=D0=B3=D1=83=
=D1=82, =D0=BF=D0=BE=D0=BB=D1=83=D1=87=D0=B0=D0=B5=D1=82=D1=81=D1=8F?
--HS00sqWD6ZL0v9qx
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