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net/af_iucv: drop inbound packets with invalid flags

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Inbound packets may have any combination of flag bits set in their iucv
header. If we don't know how to handle a specific combination, drop the
skb instead of leaking it.

To clarify what error is returned in this case, replace the hard-coded
0 with the corresponding macro.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Julian Wiedmann 2018-09-05 16:55:10 +02:00 committed by David S. Miller
parent ee28bb56ac
commit 222440996d
1 changed files with 2 additions and 2 deletions
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4
net/iucv/af_iucv.c
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@ -2155,8 +2155,8 @@ static int afiucv_hs_rcv(struct sk_buff *skb, struct net_device *dev,
struct sock *sk;
struct iucv_sock *iucv;
struct af_iucv_trans_hdr *trans_hdr;
int err = NET_RX_SUCCESS;
char nullstring[8];
int err = 0;
if (skb->len < (ETH_HLEN + sizeof(struct af_iucv_trans_hdr))) {
WARN_ONCE(1, "AF_IUCV too short skb, len=%d, min=%d",
@ -2254,7 +2254,7 @@ static int afiucv_hs_rcv(struct sk_buff *skb, struct net_device *dev,
err = afiucv_hs_callback_rx(sk, skb);
break;
default:
;
kfree_skb(skb);
}
return err;