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net: Make setsockopt() optlen be unsigned.

Browse source 
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 <[email protected]>
This commit is contained in:
David S. Miller 2009-09-30 16:12:20 -07:00
commit b7058842c9
67 changed files with 149 additions and 153 deletions
Download patch file Download diff file Expand all files Collapse all files

2
net/ipv4/inet_connection_sock.c
View file

@ -714,7 +714,7 @@ int inet_csk_compat_getsockopt(struct sock *sk, int level, int optname,
EXPORT_SYMBOL_GPL(inet_csk_compat_getsockopt);
int inet_csk_compat_setsockopt(struct sock *sk, int level, int optname,
char __user *optval, int optlen)
char __user *optval, unsigned int optlen)
{
const struct inet_connection_sock *icsk = inet_csk(sk);

6
net/ipv4/ip_sockglue.c
View file

@ -440,7 +440,7 @@ out:
*/
static int do_ip_setsockopt(struct sock *sk, int level,
int optname, char __user *optval, int optlen)
int optname, char __user *optval, unsigned int optlen)
{
struct inet_sock *inet = inet_sk(sk);
int val = 0, err;
@ -950,7 +950,7 @@ e_inval:
}
int ip_setsockopt(struct sock *sk, int level,
int optname, char __user *optval, int optlen)
int optname, char __user *optval, unsigned int optlen)
{
int err;
@ -975,7 +975,7 @@ EXPORT_SYMBOL(ip_setsockopt);
#ifdef CONFIG_COMPAT
int compat_ip_setsockopt(struct sock *sk, int level, int optname,
char __user *optval, int optlen)
char __user *optval, unsigned int optlen)
{
int err;

2
net/ipv4/ipmr.c
View file

@ -931,7 +931,7 @@ static void mrtsock_destruct(struct sock *sk)
* MOSPF/PIM router set up we can clean this up.
*/
int ip_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, int optlen)
int ip_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, unsigned int optlen)
{
int ret;
struct vifctl vif;

6
net/ipv4/raw.c
View file

@ -741,7 +741,7 @@ out: return ret;
}
static int do_raw_setsockopt(struct sock *sk, int level, int optname,
char __user *optval, int optlen)
char __user *optval, unsigned int optlen)
{
if (optname == ICMP_FILTER) {
if (inet_sk(sk)->num != IPPROTO_ICMP)
@ -753,7 +753,7 @@ static int do_raw_setsockopt(struct sock *sk, int level, int optname,
}
static int raw_setsockopt(struct sock *sk, int level, int optname,
char __user *optval, int optlen)
char __user *optval, unsigned int optlen)
{
if (level != SOL_RAW)
return ip_setsockopt(sk, level, optname, optval, optlen);
@ -762,7 +762,7 @@ static int raw_setsockopt(struct sock *sk, int level, int optname,
#ifdef CONFIG_COMPAT
static int compat_raw_setsockopt(struct sock *sk, int level, int optname,
char __user *optval, int optlen)
char __user *optval, unsigned int optlen)
{
if (level != SOL_RAW)
return compat_ip_setsockopt(sk, level, optname, optval, optlen);

6
net/ipv4/tcp.c
View file

@ -2032,7 +2032,7 @@ int tcp_disconnect(struct sock *sk, int flags)
* Socket option code for TCP.
*/
static int do_tcp_setsockopt(struct sock *sk, int level,
int optname, char __user *optval, int optlen)
int optname, char __user *optval, unsigned int optlen)
{
struct tcp_sock *tp = tcp_sk(sk);
struct inet_connection_sock *icsk = inet_csk(sk);
@ -2220,7 +2220,7 @@ static int do_tcp_setsockopt(struct sock *sk, int level,
}
int tcp_setsockopt(struct sock *sk, int level, int optname, char __user *optval,
int optlen)
unsigned int optlen)
{
struct inet_connection_sock *icsk = inet_csk(sk);
@ -2232,7 +2232,7 @@ int tcp_setsockopt(struct sock *sk, int level, int optname, char __user *optval,
#ifdef CONFIG_COMPAT
int compat_tcp_setsockopt(struct sock *sk, int level, int optname,
char __user *optval, int optlen)
char __user *optval, unsigned int optlen)
{
if (level != SOL_TCP)
return inet_csk_compat_setsockopt(sk, level, optname,

6
net/ipv4/udp.c
View file

@ -1359,7 +1359,7 @@ void udp_destroy_sock(struct sock *sk)
* Socket option code for UDP
*/
int udp_lib_setsockopt(struct sock *sk, int level, int optname,
char __user *optval, int optlen,
char __user *optval, unsigned int optlen,
int (*push_pending_frames)(struct sock *))
{
struct udp_sock *up = udp_sk(sk);
@ -1441,7 +1441,7 @@ int udp_lib_setsockopt(struct sock *sk, int level, int optname,
EXPORT_SYMBOL(udp_lib_setsockopt);
int udp_setsockopt(struct sock *sk, int level, int optname,
char __user *optval, int optlen)
char __user *optval, unsigned int optlen)
{
if (level == SOL_UDP || level == SOL_UDPLITE)
return udp_lib_setsockopt(sk, level, optname, optval, optlen,
@ -1451,7 +1451,7 @@ int udp_setsockopt(struct sock *sk, int level, int optname,
#ifdef CONFIG_COMPAT
int compat_udp_setsockopt(struct sock *sk, int level, int optname,
char __user *optval, int optlen)
char __user *optval, unsigned int optlen)
{
if (level == SOL_UDP || level == SOL_UDPLITE)
return udp_lib_setsockopt(sk, level, optname, optval, optlen,

4
net/ipv4/udp_impl.h
View file

@ -11,13 +11,13 @@ extern void __udp4_lib_err(struct sk_buff *, u32, struct udp_table *);
extern int udp_v4_get_port(struct sock *sk, unsigned short snum);
extern int udp_setsockopt(struct sock *sk, int level, int optname,
char __user *optval, int optlen);
char __user *optval, unsigned int optlen);
extern int udp_getsockopt(struct sock *sk, int level, int optname,
char __user *optval, int __user *optlen);
#ifdef CONFIG_COMPAT
extern int compat_udp_setsockopt(struct sock *sk, int level, int optname,
char __user *optval, int optlen);
char __user *optval, unsigned int optlen);
extern int compat_udp_getsockopt(struct sock *sk, int level, int optname,
char __user *optval, int __user *optlen);
#endif