[PATCH v4 07/30] util: check for 0 args when applying iptables rule

In normal practice a virFirewallCmd should never have 0 args by the time it gets to the Apply stage, but at some time while debugging one of the other patches in this series, exactly that happened (due to a bug that was since squashed), and having a check for it helped debugging, so let's permanently check for it. Signed-off-by: Laine Stump <laine(a)redhat.com&gt; Reviewed-by: Daniel P. Berrangé <berrange(a)redhat.com&gt; --- src/util/virfirewall.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/src/util/virfirewall.c b/src/util/virfirewall.c index 902cb8e445..1897a66070 100644 --- a/src/util/virfirewall.c +++ b/src/util/virfirewall.c @@ -538,6 +538,12 @@ virFirewallApplyCmd(virFirewall *firewall, if (fwCmd->ignoreErrors) ignoreErrors = fwCmd->ignoreErrors; + if (fwCmd->argsLen == 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("Can't apply empty firewall command")); + return -1; + } + if (virFirewallApplyCmdDirect(fwCmd, ignoreErrors, &output) < 0) return -1; -- 2.44.0