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/linux/mroute.h b/include/linux/mroute.h
index 0d45b4e..08bc776 100644
--- a/include/linux/mroute.h
+++ b/include/linux/mroute.h
@@ -145,14 +145,14 @@
#endif
#ifdef CONFIG_IP_MROUTE
-extern int ip_mroute_setsockopt(struct sock *, int, char __user *, int);
+extern int ip_mroute_setsockopt(struct sock *, int, char __user *, unsigned int);
extern int ip_mroute_getsockopt(struct sock *, int, char __user *, int __user *);
extern int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg);
extern int ip_mr_init(void);
#else
static inline
int ip_mroute_setsockopt(struct sock *sock,
- int optname, char __user *optval, int optlen)
+ int optname, char __user *optval, unsigned int optlen)
{
return -ENOPROTOOPT;
}