From f019023539b64742e8f1ebc38ea26a204fa0a45c Mon Sep 17 00:00:00 2001
Message-Id: <f019023539b64742e8f1ebc38ea26a204fa0a45c@dist-git>
From: =?UTF-8?q?J=C3=A1n=20Tomko?= <jtomko@redhat.com>
Date: Tue, 2 Oct 2018 14:00:41 +0200
Subject: [PATCH] security: dac: also label listen UNIX sockets
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We switched to opening mode='bind' sockets ourselves:
commit 30fb2276d88b275dc2aad6ddd28c100d944b59a5
    qemu: support passing pre-opened UNIX socket listen FD
in v4.5.0-rc1~251

Then fixed qemuBuildChrChardevStr to change libvirtd's label
while creating the socket:
commit b0c6300fc42bbc3e5eb0b236392f7344581c5810
    qemu: ensure FDs passed to QEMU for chardevs have correct SELinux labels
v4.5.0-rc1~52

Also add labeling of these sockets to the DAC driver.
Instead of duplicating the logic which decides whether libvirt should
pre-create the socket, assume an existing path meaning that it was created
by libvirt.

https://bugzilla.redhat.com/show_bug.cgi?id=1633389

Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
(cherry picked from commit d6b8838dd83697f721fe0706068df765148154de)
Signed-off-by: Ján Tomko <jtomko@redhat.com>

RHEL 8.0: https://bugzilla.redhat.com/show_bug.cgi?id=1634775
RHEL 7.6: https://bugzilla.redhat.com/show_bug.cgi?id=1635228

Conflicts: src/security/security_dac.c
    commit 3ac7793ad1ae0f4dc7b7ddbcfd182d5ff0b45538
      security_dac: Pass virSecurityManagerPtr to virSecurityDACSetOwnership
    is not backported
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
---
 src/security/security_dac.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/security/security_dac.c b/src/security/security_dac.c
index 4b623dcf39..74c70dd092 100644
--- a/src/security/security_dac.c
+++ b/src/security/security_dac.c
@@ -1248,7 +1248,12 @@ virSecurityDACSetChardevLabel(virSecurityManagerPtr mgr,
         break;
 
     case VIR_DOMAIN_CHR_TYPE_UNIX:
-        if (!dev_source->data.nix.listen) {
+        if (!dev_source->data.nix.listen ||
+            (dev_source->data.nix.path &&
+             virFileExists(dev_source->data.nix.path))) {
+            /* Also label mode='bind' sockets if they exist,
+             * e.g. because they were created by libvirt
+             * and passed via FD */
             if (virSecurityDACSetOwnership(priv, NULL,
                                            dev_source->data.nix.path,
                                            user, group) < 0)
-- 
2.21.0