On 09/22/2017 03:15 PM, Jim Fehlig wrote:
Kernel 4.13 introduced finer-grained ptrace checks
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/commit/?h=v4.13.2&id=290f458a4f16f9cf6cb6562b249e69fe1c3c3a07
With kernel 4.13 and apparmor 2.11, simply starting libvirtd
results in the following apparmor denial
type=AVC msg=audit(1506112085.645:954): apparmor="DENIED"
operation="ptrace" profile="/usr/sbin/libvirtd" pid=6984
comm="libvirtd" requested_mask="trace" denied_mask="trace"
peer="unconfined"
Attempting to start an unconfined domain results in
type=AVC msg=audit(1506112301.227:1112): apparmor="DENIED"
operation="ptrace" profile="/usr/sbin/libvirtd" pid=7498
comm="libvirtd" requested_mask="trace" denied_mask="trace"
peer="/usr/sbin/libvirtd"
And attempting to start a confined domain results in
type=AVC msg=audit(1506112631.408:1312): apparmor="DENIED"
operation="open" profile="virt-aa-helper" name="/etc/libnl/classid"
pid=8283 comm="virt-aa-helper" requested_mask="r" denied_mask="r"
fsuid=0 ouid=0
type=AVC msg=audit(1506112631.530:1319): apparmor="DENIED"
operation="open" profile="virt-aa-helper" name="/etc/libnl/classid"
pid=8289 comm="virt-aa-helper" requested_mask="r" denied_mask="r"
fsuid=0 ouid=0
type=AVC msg=audit(1506112632.186:1324): apparmor="DENIED"
operation="ptrace" profile="/usr/sbin/libvirtd" pid=8342
comm="libvirtd" requested_mask="trace" denied_mask="trace"
peer="libvirt-66154842-e926-4f92-92f0-1c1bf61dd1ff"
Add ptrace rules to allow the trace operations.
Resolves: https://bugzilla.suse.com/show_bug.cgi?id=1058847
Signed-off-by: Jim Fehlig <jfehlig@xxxxxxxx>
---
examples/apparmor/usr.sbin.libvirtd | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/examples/apparmor/usr.sbin.libvirtd b/examples/apparmor/usr.sbin.libvirtd
index acb59e071..6088db294 100644
--- a/examples/apparmor/usr.sbin.libvirtd
+++ b/examples/apparmor/usr.sbin.libvirtd
@@ -37,6 +37,10 @@
network packet dgram,
network packet raw,
+ ptrace (trace) peer=unconfined,
+ ptrace (trace) peer=/usr/sbin/libvirtd,
+ ptrace (tace) peer=(label=@{profile_name}),
+
Opps, typo here. I've squashed to below diff to my local branch.
diff --git a/examples/apparmor/usr.sbin.libvirtd
b/examples/apparmor/usr.sbin.libvirtd
index 6088db294..defcd1567 100644
--- a/examples/apparmor/usr.sbin.libvirtd
+++ b/examples/apparmor/usr.sbin.libvirtd
@@ -39,7 +39,7 @@
ptrace (trace) peer=unconfined,
ptrace (trace) peer=/usr/sbin/libvirtd,
- ptrace (tace) peer=(label=@{profile_name}),
+ ptrace (trace) peer=(label=@{profile_name}),
# Very lenient profile for libvirtd since we want to first focus on confining
# the guests. Guests will have a very restricted profile.
--
libvir-list mailing list
libvir-list@xxxxxxxxxx
https://www.redhat.com/mailman/listinfo/libvir-list
