lib: fix crash when terminating inactive VRFs

If the VRF is not enabled, if_terminate deletes the VRF after the last
interface is removed from it. Therefore daemons crash on the subsequent
call to vrf_delete. We should call vrf_delete only for enabled VRFs.

Signed-off-by: Igor Ryzhov <iryzhov@nfware.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/lib/vrf.c b/lib/vrf.c
index a9a5a83794..aaedb63800 100644
--- a/lib/vrf.c
+++ b/lib/vrf.c
@@ -539,10 +539,13 @@ void vrf_init(int (*create)(struct vrf *), int (*enable)(struct vrf *),
 
 static void vrf_terminate_single(struct vrf *vrf)
 {
+	int enabled = vrf_is_enabled(vrf);
+
 	/* Clear configured flag and invoke delete. */
 	UNSET_FLAG(vrf->status, VRF_CONFIGURED);
 	if_terminate(vrf);
-	vrf_delete(vrf);
+	if (enabled)
+		vrf_delete(vrf);
 }
 
 /* Terminate VRF module. */