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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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10
net/dccp/proto.c
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@@ -393,7 +393,7 @@ out:
EXPORT_SYMBOL_GPL(dccp_ioctl);
static int dccp_setsockopt_service(struct sock *sk, const __be32 service,
char __user *optval, int optlen)
char __user *optval, unsigned int optlen)
{
struct dccp_sock *dp = dccp_sk(sk);
struct dccp_service_list *sl = NULL;
@@ -464,7 +464,7 @@ static int dccp_setsockopt_cscov(struct sock *sk, int cscov, bool rx)
}
static int dccp_setsockopt_ccid(struct sock *sk, int type,
char __user *optval, int optlen)
char __user *optval, unsigned int optlen)
{
u8 *val;
int rc = 0;
@@ -494,7 +494,7 @@ static int dccp_setsockopt_ccid(struct sock *sk, int type,
}
static int do_dccp_setsockopt(struct sock *sk, int level, int optname,
char __user *optval, int optlen)
char __user *optval, unsigned int optlen)
{
struct dccp_sock *dp = dccp_sk(sk);
int val, err = 0;
@@ -546,7 +546,7 @@ static int do_dccp_setsockopt(struct sock *sk, int level, int optname,
}
int dccp_setsockopt(struct sock *sk, int level, int optname,
char __user *optval, int optlen)
char __user *optval, unsigned int optlen)
{
if (level != SOL_DCCP)
return inet_csk(sk)->icsk_af_ops->setsockopt(sk, level,
@@ -559,7 +559,7 @@ EXPORT_SYMBOL_GPL(dccp_setsockopt);
#ifdef CONFIG_COMPAT
int compat_dccp_setsockopt(struct sock *sk, int level, int optname,
char __user *optval, int optlen)
char __user *optval, unsigned int optlen)
{
if (level != SOL_DCCP)
return inet_csk_compat_setsockopt(sk, level, optname,