From: Tim Wiederhake <twiederh@redhat.com>
Date: Fri, 8 Apr 2022 10:38:14 +0000 (+0200)
Subject: virNWFilterObjListFree: Prevent null pointer derefernce
X-Git-Tag: v8.3.0-rc1~121
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=db2989c3a50e8905ec889ed03e3b7aa02ca2d194;p=thirdparty%2Flibvirt.git

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>
---

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);