net: Make setsockopt() optlen be unsigned.

This provides safety against negative optlen at the type
level instead of depending upon (sometimes non-trivial)
checks against this sprinkled all over the the place, in
each and every implementation.

Based upon work done by Arjan van de Ven and feedback
from Linus Torvalds.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/net/rds/af_rds.c b/net/rds/af_rds.c
index 6b58aeff4c7a..98e05382fd3c 100644
--- a/net/rds/af_rds.c
+++ b/net/rds/af_rds.c
@@ -248,7 +248,7 @@ static int rds_cong_monitor(struct rds_sock *rs, char __user *optval,
 }
 
 static int rds_setsockopt(struct socket *sock, int level, int optname,
-                          char __user *optval, int optlen)
+                          char __user *optval, unsigned int optlen)
 {
         struct rds_sock *rs = rds_sk_to_rs(sock->sk);
         int ret;