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net: Make setsockopt() optlen be unsigned.

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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>
This commit is contained in:
David S. Miller
2009-09-30 16:12:20 -07:00
parent eb1cf0f8f7
commit b7058842c9
67 changed files with 149 additions and 153 deletions
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4
include/net/tcp.h
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@@ -394,13 +394,13 @@ extern int tcp_getsockopt(struct sock *sk, int level,
int __user *optlen);
extern int tcp_setsockopt(struct sock *sk, int level,
int optname, char __user *optval,
int optlen);
unsigned int optlen);
extern int compat_tcp_getsockopt(struct sock *sk,
int level, int optname,
char __user *optval, int __user *optlen);
extern int compat_tcp_setsockopt(struct sock *sk,
int level, int optname,
char __user *optval, int optlen);
char __user *optval, unsigned int optlen);
extern void tcp_set_keepalive(struct sock *sk, int val);
extern int tcp_recvmsg(struct kiocb *iocb, struct sock *sk,
struct msghdr *msg,