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Code

[NET]: fix uaccess handling

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Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Heiko Carstens 2006-10-30 15:06:12 -08:00 committed by David S. Miller
parent 28cd775273
commit a27b58fed9
3 changed files with 25 additions and 14 deletions
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17
net/ipv4/raw.c
View File

@ -329,7 +329,7 @@ error:
return err;
}
static void raw_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
static int raw_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
{
struct iovec *iov;
u8 __user *type = NULL;
@ -338,7 +338,7 @@ static void raw_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
unsigned int i;
if (!msg->msg_iov)
return;
return 0;
for (i = 0; i < msg->msg_iovlen; i++) {
iov = &msg->msg_iov[i];
@ -360,8 +360,9 @@ static void raw_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
code = iov->iov_base;
if (type && code) {
get_user(fl->fl_icmp_type, type);
get_user(fl->fl_icmp_code, code);
if (get_user(fl->fl_icmp_type, type) ||
get_user(fl->fl_icmp_code, code))
return -EFAULT;
probed = 1;
}
break;
@ -372,6 +373,7 @@ static void raw_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
if (probed)
break;
}
return 0;
}
static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
@ -480,8 +482,11 @@ static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
.proto = inet->hdrincl ? IPPROTO_RAW :
sk->sk_protocol,
};
if (!inet->hdrincl)
raw_probe_proto_opt(&fl, msg);
if (!inet->hdrincl) {
err = raw_probe_proto_opt(&fl, msg);
if (err)
goto done;
}
security_sk_classify_flow(sk, &fl);
err = ip_route_output_flow(&rt, &fl, sk, !(msg->msg_flags&MSG_DONTWAIT));

17
net/ipv6/raw.c
View File

@ -604,7 +604,7 @@ error:
return err;
}
static void rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
static int rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
{
struct iovec *iov;
u8 __user *type = NULL;
@ -616,7 +616,7 @@ static void rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
int i;
if (!msg->msg_iov)
return;
return 0;
for (i = 0; i < msg->msg_iovlen; i++) {
iov = &msg->msg_iov[i];
@ -638,8 +638,9 @@ static void rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
code = iov->iov_base;
if (type && code) {
get_user(fl->fl_icmp_type, type);
get_user(fl->fl_icmp_code, code);
if (get_user(fl->fl_icmp_type, type) ||
get_user(fl->fl_icmp_code, code))
return -EFAULT;
probed = 1;
}
break;
@ -650,7 +651,8 @@ static void rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
/* check if type field is readable or not. */
if (iov->iov_len > 2 - len) {
u8 __user *p = iov->iov_base;
get_user(fl->fl_mh_type, &p[2 - len]);
if (get_user(fl->fl_mh_type, &p[2 - len]))
return -EFAULT;
probed = 1;
} else
len += iov->iov_len;
@ -664,6 +666,7 @@ static void rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
if (probed)
break;
}
return 0;
}
static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
@ -787,7 +790,9 @@ static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
opt = ipv6_fixup_options(&opt_space, opt);
fl.proto = proto;
rawv6_probe_proto_opt(&fl, msg);
err = rawv6_probe_proto_opt(&fl, msg);
if (err)
goto out;
ipv6_addr_copy(&fl.fl6_dst, daddr);
if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr))

5
net/netlink/af_netlink.c
View File

@ -1075,8 +1075,9 @@ static int netlink_getsockopt(struct socket *sock, int level, int optname,
return -EINVAL;
len = sizeof(int);
val = nlk->flags & NETLINK_RECV_PKTINFO ? 1 : 0;
put_user(len, optlen);
put_user(val, optval);
if (put_user(len, optlen) ||
put_user(val, optval))
return -EFAULT;
err = 0;
break;
default: