From: Mohsin Kazmi <sykazmi@cisco.com>
Date: Wed, 28 Oct 2020 18:35:53 +0000 (+0100)
Subject: tap: fix the segv
X-Git-Tag: v21.06-rc0~247
X-Git-Url: https://gerrit.fd.io/r/gitweb?a=commitdiff_plain;h=108b15b4ef4844ef782639b9d9c3c71c222b5d9f;p=vpp.git

tap: fix the segv

Type: fix

Change-Id: I53cb96950f8658d7159fb0bd8ecfa50b6977e5af
Signed-off-by: Mohsin Kazmi <sykazmi@cisco.com>
---

diff --git a/src/vnet/devices/tap/tap.c b/src/vnet/devices/tap/tap.c
index 6ad01770cf0..aa9182a58f7 100644
--- a/src/vnet/devices/tap/tap.c
+++ b/src/vnet/devices/tap/tap.c
@@ -109,8 +109,11 @@ tap_free (vlib_main_t * vm, virtio_if_t * vif)
     virtio_vring_free_tx (vm, vif, TX_QUEUE (i));
   /* *INDENT-ON* */
 
-  _IOCTL (vif->tap_fds[0], TUNSETPERSIST, (void *) (uintptr_t) 0);
-  tap_log_dbg (vif, "TUNSETPERSIST: unset");
+  if (vif->tap_fds)
+    {
+      _IOCTL (vif->tap_fds[0], TUNSETPERSIST, (void *) (uintptr_t) 0);
+      tap_log_dbg (vif, "TUNSETPERSIST: unset");
+    }
 error:
   vec_foreach_index (i, vif->tap_fds) close (vif->tap_fds[i]);