[libvirt] [PATCH] AppArmor: add rules needed with additional mediation features brought by Linux 4.14.
10:58 a.m.
---
examples/apparmor/libvirt-qemu | 2 ++
examples/apparmor/usr.sbin.libvirtd | 9 +++++++++
2 files changed, 11 insertions(+)
diff --git a/examples/apparmor/libvirt-qemu b/examples/apparmor/libvirt-qemu
index b341e31f42..5994a35042 100644
--- a/examples/apparmor/libvirt-qemu
+++ b/examples/apparmor/libvirt-qemu
@@ -16,6 +16,8 @@
network inet stream,
network inet6 stream,
+ signal (receive) set=("term") peer=/usr/sbin/libvirtd,
+
/dev/net/tun rw,
/dev/kvm rw,
/dev/ptmx rw,
diff --git a/examples/apparmor/usr.sbin.libvirtd b/examples/apparmor/usr.sbin.libvirtd
index 819068ffc3..17b5ee38ff 100644
--- a/examples/apparmor/usr.sbin.libvirtd
+++ b/examples/apparmor/usr.sbin.libvirtd
@@ -30,6 +30,8 @@
# Needed for vfio
capability sys_resource,
+ mount,
+
network inet stream,
network inet dgram,
network inet6 stream,
@@ -37,11 +39,18 @@
network packet dgram,
network packet raw,
+ network netlink raw,
+ network unix dgram,
+ network unix stream,
+
ptrace (trace) peer=unconfined,
ptrace (trace) peer=/usr/sbin/libvirtd,
ptrace (trace) peer=/usr/sbin/dnsmasq,
ptrace (trace) peer=libvirt-*,
+ signal (send) set=("hup") peer=/usr/sbin/dnsmasq,
+ signal (send) set=("term") peer=libvirt-*,
+
# Very lenient profile for libvirtd since we want to first focus on confining
# the guests. Guests will have a very restricted profile.
/ r,
--
2.15.0.rc2
5:21 a.m.
New subject: [libvirt] [PATCH v2] AppArmor: add rules needed with additional mediation features brought by Linux 4.14.
[PATCH v2] AppArmor: add rules needed with additional mediation features
Changes since v1:
- remove unneeded "network unix" rules added by v1: they were only
needed due to a bug in apparmor_parser, that was fixed in AppArmor
2.11.1 since then;
- move the "network netlink raw" rule to honor previous sorting.
Note that the "mount" rule is very broad. It could be replaced with
a set of more specific rules in the future. A draft is available on
https://bugzilla.opensuse.org/show_bug.cgi?id=1065123, that should be
tested on various distros and configurations before it is submitted
upstream. But let's not block on this and focus first on avoiding
breakage when distros ship Linux 4.14: this is not a regression given
so far we had no mount mediation at all (except in Ubuntu that carries
out-of-tree patches).
5:22 a.m.
From: intrigeri <intrigeri+libvirt(a)boum.org>
---
examples/apparmor/libvirt-qemu | 2 ++
examples/apparmor/usr.sbin.libvirtd | 6 ++++++
2 files changed, 8 insertions(+)
diff --git a/examples/apparmor/libvirt-qemu b/examples/apparmor/libvirt-qemu
index b341e31f42..5994a35042 100644
--- a/examples/apparmor/libvirt-qemu
+++ b/examples/apparmor/libvirt-qemu
@@ -16,6 +16,8 @@
network inet stream,
network inet6 stream,
+ signal (receive) set=("term") peer=/usr/sbin/libvirtd,
+
/dev/net/tun rw,
/dev/kvm rw,
/dev/ptmx rw,
diff --git a/examples/apparmor/usr.sbin.libvirtd b/examples/apparmor/usr.sbin.libvirtd
index 819068ffc3..eb24726e08 100644
--- a/examples/apparmor/usr.sbin.libvirtd
+++ b/examples/apparmor/usr.sbin.libvirtd
@@ -30,10 +30,13 @@
# Needed for vfio
capability sys_resource,
+ mount,
+
network inet stream,
network inet dgram,
network inet6 stream,
network inet6 dgram,
+ network netlink raw,
network packet dgram,
network packet raw,
@@ -42,6 +45,9 @@
ptrace (trace) peer=/usr/sbin/dnsmasq,
ptrace (trace) peer=libvirt-*,
+ signal (send) set=("hup") peer=/usr/sbin/dnsmasq,
+ signal (send) set=("term") peer=libvirt-*,
+
# Very lenient profile for libvirtd since we want to first focus on confining
# the guests. Guests will have a very restricted profile.
/ r,
--
2.15.0.rc2
8:39 a.m.
On Thu, 2017-10-26 at 10:22 +0000, intrigeri+libvirt(a)boum.org wrote:
From: intrigeri <intrigeri+libvirt(a)boum.org>
---
examples/apparmor/libvirt-qemu | 2 ++
examples/apparmor/usr.sbin.libvirtd | 6 ++++++
2 files changed, 8 insertions(+)
diff --git a/examples/apparmor/libvirt-qemu
b/examples/apparmor/libvirt-qemu
index b341e31f42..5994a35042 100644
--- a/examples/apparmor/libvirt-qemu
+++ b/examples/apparmor/libvirt-qemu
@@ -16,6 +16,8 @@
network inet stream,
network inet6 stream,
+ signal (receive) set=("term") peer=/usr/sbin/libvirtd,
I suggest this rule instead:
signal (receive) peer=/usr/sbin/libvirtd,
ie, let libvirtd send any signals it wants to its VMs.
/dev/net/tun rw,
/dev/kvm rw,
/dev/ptmx rw,
diff --git a/examples/apparmor/usr.sbin.libvirtd
b/examples/apparmor/usr.sbin.libvirtd
index 819068ffc3..eb24726e08 100644
--- a/examples/apparmor/usr.sbin.libvirtd
+++ b/examples/apparmor/usr.sbin.libvirtd
@@ -30,10 +30,13 @@
# Needed for vfio
capability sys_resource,
+ mount,
+
This is interesting since the Ubuntu profile is missing mount rules.
What specific denials/libvirt actions prompted this rule?
network inet stream,
network inet dgram,
network inet6 stream,
network inet6 dgram,
+ network netlink raw,
This is fine.
network packet dgram,
network packet raw,
@@ -42,6 +45,9 @@
ptrace (trace) peer=/usr/sbin/dnsmasq,
ptrace (trace) peer=libvirt-*,
+ signal (send) set=("hup") peer=/usr/sbin/dnsmasq,
I suspect you are missing 'term' to support net-destroy. I suggest this
instead:
signal (send) peer=/usr/sbin/dnsmasq,
Ie, let libvirtd send any signals to fully manage its dnsmasq.
+ signal (send) set=("term") peer=libvirt-*,
I suggest this instead:
signal (send) peer=libvirt-*,
Ie, let libvirtd send any signals to its VMs.
I think you are missing this in libvirt-qemu:
ptrace (readby, tracedby) peer=/usr/sbin/libvirtd,
and this in usr.sbin.libvirtd:
ptrace (read, trace) peer=libvirt-*,
--
Jamie Strandboge | http://www.canonical.com
8:45 a.m.
On Thu, 2017-10-26 at 08:39 -0500, Jamie Strandboge wrote:
On Thu, 2017-10-26 at 10:22 +0000, intrigeri+libvirt(a)boum.org wrote:
> diff --git a/examples/apparmor/usr.sbin.libvirtd
> b/examples/apparmor/usr.sbin.libvirtd
> index 819068ffc3..eb24726e08 100644
> --- a/examples/apparmor/usr.sbin.libvirtd
> +++ b/examples/apparmor/usr.sbin.libvirtd
> @@ -30,10 +30,13 @@
> # Needed for vfio
> capability sys_resource,
>
> + mount,
> +
This is interesting since the Ubuntu profile is missing mount rules.
What specific denials/libvirt actions prompted this rule?
Responding to myself now that I read the SUSE bug. I actually suggest
using the fine-grained rules in the SUSE patch because it is much
easier to add more rules for more access than to take them away. These
rules are in the 'examples' directory so I think it is expected that a
distribution may need to tailor them from time to time (hopefully
upstreaming their changes! :).
--
Jamie Strandboge | http://www.canonical.com
8:50 a.m.
Hi,
thanks Jamie for this review. All your suggestions make sense to me,
I'll implement + test them and will re-submit as v3.
Cheers,
--
intrigeri
9:29 a.m.
New subject: [libvirt] [PATCH v3] AppArmor: add rules needed with additional mediation features brought by Linux 4.14.
Changes since v2:
- made signal rules broader, as suggested by Jamie Strandboge
<jamie(a)canonical.com> and indeed my tests confirm v2 was too
strict;
- allowed libvirtd "ptrace (read)" on libvirt-* guests, as suggested
by Jamie Strandboge <jamie(a)canonical.com>
- added fine-grained mount rules written by openSUSE's Christian
Boltz
9:29 a.m.
New subject: [libvirt] [PATCH 1/2] AppArmor: add rules needed with additional mediation features brought by Linux 4.14.
From: intrigeri <intrigeri+libvirt(a)boum.org>
---
examples/apparmor/libvirt-qemu | 4 ++++
examples/apparmor/usr.sbin.libvirtd | 6 ++++++
2 files changed, 10 insertions(+)
diff --git a/examples/apparmor/libvirt-qemu b/examples/apparmor/libvirt-qemu
index 97dd2d45a9..9d487bf92f 100644
--- a/examples/apparmor/libvirt-qemu
+++ b/examples/apparmor/libvirt-qemu
@@ -16,6 +16,10 @@
network inet stream,
network inet6 stream,
+ ptrace (readby, tracedby) peer=/usr/sbin/libvirtd,
+
+ signal (receive) peer=/usr/sbin/libvirtd,
+
/dev/net/tun rw,
/dev/kvm rw,
/dev/ptmx rw,
diff --git a/examples/apparmor/usr.sbin.libvirtd b/examples/apparmor/usr.sbin.libvirtd
index 819068ffc3..d2831aa491 100644
--- a/examples/apparmor/usr.sbin.libvirtd
+++ b/examples/apparmor/usr.sbin.libvirtd
@@ -30,10 +30,13 @@
# Needed for vfio
capability sys_resource,
+ mount,
+
network inet stream,
network inet dgram,
network inet6 stream,
network inet6 dgram,
+ network netlink raw,
network packet dgram,
network packet raw,
@@ -42,6 +45,9 @@
ptrace (trace) peer=/usr/sbin/dnsmasq,
ptrace (trace) peer=libvirt-*,
+ signal (send) peer=/usr/sbin/dnsmasq,
+ signal (read, send) peer=libvirt-*,
+
# Very lenient profile for libvirtd since we want to first focus on confining
# the guests. Guests will have a very restricted profile.
/ r,
--
2.15.0
10:51 a.m.
New subject: [libvirt] [PATCH 1/2] AppArmor: add rules needed with additional mediation features brought by Linux 4.14.
On 11/05/2017 08:29 AM, intrigeri+libvirt(a)boum.org wrote:
From: intrigeri <intrigeri+libvirt(a)boum.org>
---
examples/apparmor/libvirt-qemu | 4 ++++
examples/apparmor/usr.sbin.libvirtd | 6 ++++++
2 files changed, 10 insertions(+)
diff --git a/examples/apparmor/libvirt-qemu b/examples/apparmor/libvirt-qemu
index 97dd2d45a9..9d487bf92f 100644
--- a/examples/apparmor/libvirt-qemu
+++ b/examples/apparmor/libvirt-qemu
@@ -16,6 +16,10 @@
network inet stream,
network inet6 stream,
+ ptrace (readby, tracedby) peer=/usr/sbin/libvirtd,
+
+ signal (receive) peer=/usr/sbin/libvirtd,
+
/dev/net/tun rw,
/dev/kvm rw,
/dev/ptmx rw,
diff --git a/examples/apparmor/usr.sbin.libvirtd b/examples/apparmor/usr.sbin.libvirtd
index 819068ffc3..d2831aa491 100644
--- a/examples/apparmor/usr.sbin.libvirtd
+++ b/examples/apparmor/usr.sbin.libvirtd
@@ -30,10 +30,13 @@
# Needed for vfio
capability sys_resource,
+ mount,
+
I suppose this isn't needed here since it is removed in 2/2?
Regards,
Jim
network inet stream,
network inet dgram,
network inet6 stream,
network inet6 dgram,
+ network netlink raw,
network packet dgram,
network packet raw,
@@ -42,6 +45,9 @@
ptrace (trace) peer=/usr/sbin/dnsmasq,
ptrace (trace) peer=libvirt-*,
+ signal (send) peer=/usr/sbin/dnsmasq,
+ signal (read, send) peer=libvirt-*,
+
# Very lenient profile for libvirtd since we want to first focus on confining
# the guests. Guests will have a very restricted profile.
/ r,
3:50 p.m.
New subject: [libvirt] [PATCH 1/2] AppArmor: add rules needed with additional mediation features brought by Linux 4.14.
On Sun, 2017-11-05 at 15:29 +0000, intrigeri+libvirt(a)boum.org wrote:
From: intrigeri <intrigeri+libvirt(a)boum.org>
---
examples/apparmor/libvirt-qemu | 4 ++++
examples/apparmor/usr.sbin.libvirtd | 6 ++++++
2 files changed, 10 insertions(+)
diff --git a/examples/apparmor/libvirt-qemu
b/examples/apparmor/libvirt-qemu
index 97dd2d45a9..9d487bf92f 100644
--- a/examples/apparmor/libvirt-qemu
+++ b/examples/apparmor/libvirt-qemu
@@ -16,6 +16,10 @@
network inet stream,
network inet6 stream,
+ ptrace (readby, tracedby) peer=/usr/sbin/libvirtd,
+
+ signal (receive) peer=/usr/sbin/libvirtd,
+
These LGTM
/dev/net/tun rw,
/dev/kvm rw,
/dev/ptmx rw,
diff --git a/examples/apparmor/usr.sbin.libvirtd
b/examples/apparmor/usr.sbin.libvirtd
index 819068ffc3..d2831aa491 100644
--- a/examples/apparmor/usr.sbin.libvirtd
+++ b/examples/apparmor/usr.sbin.libvirtd
@@ -30,10 +30,13 @@
# Needed for vfio
capability sys_resource,
+ mount,
+
Yuck, but fixed in 2/2. Better might've been to skip this rule and add
all the mount rules in 2/2.
network inet stream,
network inet dgram,
network inet6 stream,
network inet6 dgram,
+ network netlink raw,
Looks fine. Almost certainly needed for udev.
network packet dgram,
network packet raw,
@@ -42,6 +45,9 @@
ptrace (trace) peer=/usr/sbin/dnsmasq,
ptrace (trace) peer=libvirt-*,
+ signal (send) peer=/usr/sbin/dnsmasq,
+ signal (read, send) peer=libvirt-*,
+
LGTM, thanks!
--
Jamie Strandboge | http://www.canonical.com
9:29 a.m.
New subject: [libvirt] [PATCH 2/2] AppArmor: use fine-grained mount rules instead of a blanket catch-all one
From: intrigeri <intrigeri+libvirt(a)boum.org>
This set of rules was proposed by Christian Boltz <apparmor(a)cboltz.de>
on https://bugzilla.opensuse.org/show_bug.cgi?id=1065123.
---
examples/apparmor/usr.sbin.libvirtd | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/examples/apparmor/usr.sbin.libvirtd b/examples/apparmor/usr.sbin.libvirtd
index d2831aa491..8d61d154e1 100644
--- a/examples/apparmor/usr.sbin.libvirtd
+++ b/examples/apparmor/usr.sbin.libvirtd
@@ -30,7 +30,20 @@
# Needed for vfio
capability sys_resource,
- mount,
+ mount options=(rw,rslave) -> /,
+ mount options=(rw, nosuid) -> /{var/,}run/libvirt/qemu/*.dev/,
+
+ mount options=(rw, move) /dev/ -> /{var/,}run/libvirt/qemu/*.dev/,
+ mount options=(rw, move) /dev/hugepages/ -> /{var/,}run/libvirt/qemu/*.hugepages/,
+ mount options=(rw, move) /dev/mqueue/ -> /{var/,}run/libvirt/qemu/*.mqueue/,
+ mount options=(rw, move) /dev/pts/ -> /{var/,}run/libvirt/qemu/*.pts/,
+ mount options=(rw, move) /dev/shm/ -> /{var/,}run/libvirt/qemu/*.shm/,
+
+ mount options=(rw, move) /{var/,}run/libvirt/qemu/*.dev/ -> /dev/,
+ mount options=(rw, move) /{var/,}run/libvirt/qemu/*.hugepages/ -> /dev/hugepages/,
+ mount options=(rw, move) /{var/,}run/libvirt/qemu/*.mqueue/ -> /dev/mqueue/,
+ mount options=(rw, move) /{var/,}run/libvirt/qemu/*.pts/ -> /dev/pts/,
+ mount options=(rw, move) /{var/,}run/libvirt/qemu/*.shm/ -> /dev/shm/,
network inet stream,
network inet dgram,
--
2.15.0
3:52 p.m.
New subject: [libvirt] [PATCH 2/2] AppArmor: use fine-grained mount rules instead of a blanket catch-all one
On Sun, 2017-11-05 at 15:29 +0000, intrigeri+libvirt(a)boum.org wrote:
From: intrigeri <intrigeri+libvirt(a)boum.org>
This set of rules was proposed by Christian Boltz <apparmor(a)cboltz.de
>
on https://bugzilla.opensuse.org/show_bug.cgi?id=1065123.
---
examples/apparmor/usr.sbin.libvirtd | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/examples/apparmor/usr.sbin.libvirtd
b/examples/apparmor/usr.sbin.libvirtd
index d2831aa491..8d61d154e1 100644
--- a/examples/apparmor/usr.sbin.libvirtd
+++ b/examples/apparmor/usr.sbin.libvirtd
@@ -30,7 +30,20 @@
# Needed for vfio
capability sys_resource,
- mount,
+ mount options=(rw,rslave) -> /,
+ mount options=(rw, nosuid) -> /{var/,}run/libvirt/qemu/*.dev/,
+
+ mount options=(rw, move) /dev/ ->
/{var/,}run/libvirt/qemu/*.dev/,
+ mount options=(rw, move) /dev/hugepages/ ->
/{var/,}run/libvirt/qemu/*.hugepages/,
+ mount options=(rw, move) /dev/mqueue/ ->
/{var/,}run/libvirt/qemu/*.mqueue/,
+ mount options=(rw, move) /dev/pts/ ->
/{var/,}run/libvirt/qemu/*.pts/,
+ mount options=(rw, move) /dev/shm/ ->
/{var/,}run/libvirt/qemu/*.shm/,
+
+ mount options=(rw, move) /{var/,}run/libvirt/qemu/*.dev/ ->
/dev/,
+ mount options=(rw, move) /{var/,}run/libvirt/qemu/*.hugepages/ ->
/dev/hugepages/,
+ mount options=(rw, move) /{var/,}run/libvirt/qemu/*.mqueue/ ->
/dev/mqueue/,
+ mount options=(rw, move) /{var/,}run/libvirt/qemu/*.pts/ ->
/dev/pts/,
+ mount options=(rw, move) /{var/,}run/libvirt/qemu/*.shm/ ->
/dev/shm/,
These all look fine. I suspect the rules may need to be fine-tuned for
different distributions, but that's ok, this is example policy and we
can iterate/adjust as needed.
--
Jamie Strandboge | http://www.canonical.com
8:57 a.m.
New subject: [libvirt] [PATCH v4] AppArmor: add rules needed with additional mediation features brought by Linux 4.14.
Changes since v3:
- don't add in 1/2 blanket catch-all mount rule that 2/2 was replacing anyway
8:57 a.m.
New subject: [libvirt] [PATCH 1/2] AppArmor: add rules needed with additional mediation features brought by Linux 4.14.
From: intrigeri <intrigeri+libvirt(a)boum.org>
---
examples/apparmor/libvirt-qemu | 4 ++++
examples/apparmor/usr.sbin.libvirtd | 4 ++++
2 files changed, 8 insertions(+)
diff --git a/examples/apparmor/libvirt-qemu b/examples/apparmor/libvirt-qemu
index 064501f08e..73bdbae872 100644
--- a/examples/apparmor/libvirt-qemu
+++ b/examples/apparmor/libvirt-qemu
@@ -16,6 +16,10 @@
network inet stream,
network inet6 stream,
+ ptrace (readby, tracedby) peer=/usr/sbin/libvirtd,
+
+ signal (receive) peer=/usr/sbin/libvirtd,
+
/dev/net/tun rw,
/dev/kvm rw,
/dev/ptmx rw,
diff --git a/examples/apparmor/usr.sbin.libvirtd b/examples/apparmor/usr.sbin.libvirtd
index 819068ffc3..12b9d45bf0 100644
--- a/examples/apparmor/usr.sbin.libvirtd
+++ b/examples/apparmor/usr.sbin.libvirtd
@@ -34,6 +34,7 @@
network inet dgram,
network inet6 stream,
network inet6 dgram,
+ network netlink raw,
network packet dgram,
network packet raw,
@@ -42,6 +43,9 @@
ptrace (trace) peer=/usr/sbin/dnsmasq,
ptrace (trace) peer=libvirt-*,
+ signal (send) peer=/usr/sbin/dnsmasq,
+ signal (read, send) peer=libvirt-*,
+
# Very lenient profile for libvirtd since we want to first focus on confining
# the guests. Guests will have a very restricted profile.
/ r,
--
2.15.0
8:57 a.m.
New subject: [libvirt] [PATCH 2/2] AppArmor: add mount rules needed with additional mediation features brought by Linux 4.14
From: intrigeri <intrigeri+libvirt(a)boum.org>
This set of rules was proposed by Christian Boltz <apparmor(a)cboltz.de>
on https://bugzilla.opensuse.org/show_bug.cgi?id=1065123.
---
examples/apparmor/usr.sbin.libvirtd | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/examples/apparmor/usr.sbin.libvirtd b/examples/apparmor/usr.sbin.libvirtd
index 12b9d45bf0..8d61d154e1 100644
--- a/examples/apparmor/usr.sbin.libvirtd
+++ b/examples/apparmor/usr.sbin.libvirtd
@@ -30,6 +30,21 @@
# Needed for vfio
capability sys_resource,
+ mount options=(rw,rslave) -> /,
+ mount options=(rw, nosuid) -> /{var/,}run/libvirt/qemu/*.dev/,
+
+ mount options=(rw, move) /dev/ -> /{var/,}run/libvirt/qemu/*.dev/,
+ mount options=(rw, move) /dev/hugepages/ -> /{var/,}run/libvirt/qemu/*.hugepages/,
+ mount options=(rw, move) /dev/mqueue/ -> /{var/,}run/libvirt/qemu/*.mqueue/,
+ mount options=(rw, move) /dev/pts/ -> /{var/,}run/libvirt/qemu/*.pts/,
+ mount options=(rw, move) /dev/shm/ -> /{var/,}run/libvirt/qemu/*.shm/,
+
+ mount options=(rw, move) /{var/,}run/libvirt/qemu/*.dev/ -> /dev/,
+ mount options=(rw, move) /{var/,}run/libvirt/qemu/*.hugepages/ -> /dev/hugepages/,
+ mount options=(rw, move) /{var/,}run/libvirt/qemu/*.mqueue/ -> /dev/mqueue/,
+ mount options=(rw, move) /{var/,}run/libvirt/qemu/*.pts/ -> /dev/pts/,
+ mount options=(rw, move) /{var/,}run/libvirt/qemu/*.shm/ -> /dev/shm/,
+
network inet stream,
network inet dgram,
network inet6 stream,
--
2.15.0
4:02 p.m.
New subject: [libvirt] [PATCH v4] AppArmor: add rules needed with additional mediation features brought by Linux 4.14.
Hi,
On Sun, Nov 19, 2017 at 02:57:32PM +0000, intrigeri+libvirt(a)boum.org wrote:
Changes since v3:
- don't add in 1/2 blanket catch-all mount rule that 2/2 was
replacing anyway
Pushed now. Thanks!
-- Guido
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16 comments
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Guido Günther -
intrigeri -
intrigeri+libvirt＠boum.org
-
Jamie Strandboge -
Jim Fehlig