[iptables PATCH 26/28] arptables: Fix incorrect strcmp() in nft_arp_rule_find()

[Phil Sutter]

Since nft_arp_rule_to_cs() may not set cs->jumpto, later call to
strcmp() may be passed a NULL pointer. Therefore check if the pointer is
valid before doing so.

Signed-off-by: Phil Sutter <p...@nwl.cc>
---
 iptables/nft-arp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/iptables/nft-arp.c b/iptables/nft-arp.c
index b8e8982653bb3..a2109c608670d 100644
--- a/iptables/nft-arp.c
+++ b/iptables/nft-arp.c
@@ -661,7 +661,7 @@ static bool nft_arp_rule_find(struct nft_family_ops *ops, 
struct nftnl_rule *r,
        if (!compare_targets(cs->target, this.target))
                return false;
 
-       if (strcmp(cs->jumpto, this.jumpto) != 0)
+       if (this.jumpto && strcmp(cs->jumpto, this.jumpto) != 0)
                return false;
 
        return true;
-- 
2.18.0