From db2989c3a50e8905ec889ed03e3b7aa02ca2d194 Mon Sep 17 00:00:00 2001
From: Tim Wiederhake <twiederh@redhat.com>
Date: Fri, 8 Apr 2022 12:38:14 +0200
Subject: [PATCH] virNWFilterObjListFree: Prevent null pointer derefernce

Allow virNWFilterObjListFree to be called with a NULL argument.
This enables a later patch to use virNWFilterObjListFree as a
cleanup function safely, as it is a no-op if virNWFilterObj was
not yet initialized.

Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
---
 src/conf/virnwfilterobj.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/conf/virnwfilterobj.c b/src/conf/virnwfilterobj.c
index e9bb2b1811..f9c1b049d5 100644
--- a/src/conf/virnwfilterobj.c
+++ b/src/conf/virnwfilterobj.c
@@ -110,6 +110,9 @@ virNWFilterObjFree(virNWFilterObj *obj)
 void
 virNWFilterObjListFree(virNWFilterObjList *nwfilters)
 {
+    if (!nwfilters)
+        return;
+
     g_hash_table_unref(nwfilters->objs);
     g_hash_table_unref(nwfilters->objsName);
     g_free(nwfilters);