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> --- V3: fix ptrace rule for per-domain profiles V2: restrict ptrace permissions drop support for dbus, signal, and unix 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..fa4ebb355 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 (trace) 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, -- 2.14.1 -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list
