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authorMariusz Kozlowski <mk@lab.zgora.pl>2010-11-08 11:58:45 +0000
committerDavid S. Miller <davem@davemloft.net>2010-11-12 11:06:46 -0800
commit1f18b7176e2e41fada24584ce3c80e9abfaca52b (patch)
tree4f5cc10413729e16e8965c81afba3ca953ff3642 /net
parent7c13a0d9a1ac6875f6380763b947f4a5a016605f (diff)
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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 <mk@lab.zgora.pl> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/packet/af_packet.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 0856a13cb53..8298e676f5a 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);