From 1f18b7176e2e41fada24584ce3c80e9abfaca52b Mon Sep 17 00:00:00 2001 From: Mariusz Kozlowski Date: Mon, 8 Nov 2010 11:58:45 +0000 Subject: [PATCH] net: Fix header size check for GSO case in recvmsg (af_packet) Parameter 'len' is size_t type so it will never get negative. Signed-off-by: Mariusz Kozlowski Signed-off-by: David S. Miller --- net/packet/af_packet.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c index 0856a13cb53d..8298e676f5a0 100644 --- a/net/packet/af_packet.c +++ b/net/packet/af_packet.c @@ -1610,9 +1610,11 @@ static int packet_recvmsg(struct kiocb *iocb, struct socket *sock, err = -EINVAL; vnet_hdr_len = sizeof(vnet_hdr); - if ((len -= vnet_hdr_len) < 0) + if (len < vnet_hdr_len) goto out_free; + len -= vnet_hdr_len; + if (skb_is_gso(skb)) { struct skb_shared_info *sinfo = skb_shinfo(skb); -- 2.30.2