tcp: fix a size_t < 0 comparison in tcp_read_sock

<used> should be of type int (not size_t) since recv_actor can return
negative values and it is also used in a < 0 comparison.

Signed-off-by: Octavian Purdila <opurdila@ixiacom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 1 deletions

diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index de53024664e4..1d723de18686 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -1209,7 +1209,8 @@ int tcp_read_sock(struct sock *sk, read_descriptor_t *desc,
                 return -ENOTCONN;
         while ((skb = tcp_recv_skb(sk, seq, &offset)) != NULL) {
                 if (offset < skb->len) {
-                        size_t used, len;
+                        int used;
+                        size_t len;
 
                         len = skb->len - offset;
                         /* Stop reading if we hit a patch of urgent data */