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>
diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index ad9a511..8c31d8a 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -550,7 +550,7 @@
extern int ipv6_setsockopt(struct sock *sk, int level,
int optname,
char __user *optval,
- int optlen);
+ unsigned int optlen);
extern int ipv6_getsockopt(struct sock *sk, int level,
int optname,
char __user *optval,
@@ -559,7 +559,7 @@
int level,
int optname,
char __user *optval,
- int optlen);
+ unsigned int optlen);
extern int compat_ipv6_getsockopt(struct sock *sk,
int level,
int optname,