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authorChristoph Hellwig <hch@lst.de>2020-07-23 08:08:50 +0200
committerDavid S. Miller <davem@davemloft.net>2020-07-24 15:41:53 -0700
commitc8c1bbb6eb498109286739f8b6090e99313dd104 (patch)
tree1782966e2597d7cb05e058ed2eeaf4689cfa2a0b
parentc34645ac25484968ddace9a6b140b70e72dc49b3 (diff)
net: switch sock_set_timeout to sockptr_t
Pass a sockptr_t to prepare for set_fs-less handling of the kernel pointer from bpf-cgroup. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Matthieu Baerts <matthieu.baerts@tessares.net> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--include/net/sock.h3
-rw-r--r--net/core/sock.c26
-rw-r--r--net/mptcp/protocol.c6
-rw-r--r--net/socket.c3
4 files changed, 20 insertions, 18 deletions
diff --git a/include/net/sock.h b/include/net/sock.h
index 62e18fc8ac9f..bfb2fe2fc368 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -59,6 +59,7 @@
#include <linux/filter.h>
#include <linux/rculist_nulls.h>
#include <linux/poll.h>
+#include <linux/sockptr.h>
#include <linux/atomic.h>
#include <linux/refcount.h>
@@ -1669,7 +1670,7 @@ void sock_pfree(struct sk_buff *skb);
#endif
int sock_setsockopt(struct socket *sock, int level, int op,
- char __user *optval, unsigned int optlen);
+ sockptr_t optval, unsigned int optlen);
int sock_getsockopt(struct socket *sock, int level, int op,
char __user *optval, int __user *optlen);
diff --git a/net/core/sock.c b/net/core/sock.c
index 8b9eddaff868..1444d7d53ba2 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -826,7 +826,7 @@ EXPORT_SYMBOL(sock_set_rcvbuf);
*/
int sock_setsockopt(struct socket *sock, int level, int optname,
- char __user *optval, unsigned int optlen)
+ sockptr_t optval, unsigned int optlen)
{
struct sock_txtime sk_txtime;
struct sock *sk = sock->sk;
@@ -840,12 +840,12 @@ int sock_setsockopt(struct socket *sock, int level, int optname,
*/
if (optname == SO_BINDTODEVICE)
- return sock_setbindtodevice(sk, USER_SOCKPTR(optval), optlen);
+ return sock_setbindtodevice(sk, optval, optlen);
if (optlen < sizeof(int))
return -EINVAL;
- if (get_user(val, (int __user *)optval))
+ if (copy_from_sockptr(&val, optval, sizeof(val)))
return -EFAULT;
valbool = val ? 1 : 0;
@@ -958,7 +958,7 @@ set_sndbuf:
ret = -EINVAL; /* 1003.1g */
break;
}
- if (copy_from_user(&ling, optval, sizeof(ling))) {
+ if (copy_from_sockptr(&ling, optval, sizeof(ling))) {
ret = -EFAULT;
break;
}
@@ -1052,21 +1052,20 @@ set_sndbuf:
case SO_RCVTIMEO_OLD:
case SO_RCVTIMEO_NEW:
- ret = sock_set_timeout(&sk->sk_rcvtimeo, USER_SOCKPTR(optval),
+ ret = sock_set_timeout(&sk->sk_rcvtimeo, optval,
optlen, optname == SO_RCVTIMEO_OLD);
break;
case SO_SNDTIMEO_OLD:
case SO_SNDTIMEO_NEW:
- ret = sock_set_timeout(&sk->sk_sndtimeo, USER_SOCKPTR(optval),
+ ret = sock_set_timeout(&sk->sk_sndtimeo, optval,
optlen, optname == SO_SNDTIMEO_OLD);
break;
case SO_ATTACH_FILTER: {
struct sock_fprog fprog;
- ret = copy_bpf_fprog_from_user(&fprog, USER_SOCKPTR(optval),
- optlen);
+ ret = copy_bpf_fprog_from_user(&fprog, optval, optlen);
if (!ret)
ret = sk_attach_filter(&fprog, sk);
break;
@@ -1077,7 +1076,7 @@ set_sndbuf:
u32 ufd;
ret = -EFAULT;
- if (copy_from_user(&ufd, optval, sizeof(ufd)))
+ if (copy_from_sockptr(&ufd, optval, sizeof(ufd)))
break;
ret = sk_attach_bpf(ufd, sk);
@@ -1087,8 +1086,7 @@ set_sndbuf:
case SO_ATTACH_REUSEPORT_CBPF: {
struct sock_fprog fprog;
- ret = copy_bpf_fprog_from_user(&fprog, USER_SOCKPTR(optval),
- optlen);
+ ret = copy_bpf_fprog_from_user(&fprog, optval, optlen);
if (!ret)
ret = sk_reuseport_attach_filter(&fprog, sk);
break;
@@ -1099,7 +1097,7 @@ set_sndbuf:
u32 ufd;
ret = -EFAULT;
- if (copy_from_user(&ufd, optval, sizeof(ufd)))
+ if (copy_from_sockptr(&ufd, optval, sizeof(ufd)))
break;
ret = sk_reuseport_attach_bpf(ufd, sk);
@@ -1179,7 +1177,7 @@ set_sndbuf:
if (sizeof(ulval) != sizeof(val) &&
optlen >= sizeof(ulval) &&
- get_user(ulval, (unsigned long __user *)optval)) {
+ copy_from_sockptr(&ulval, optval, sizeof(ulval))) {
ret = -EFAULT;
break;
}
@@ -1222,7 +1220,7 @@ set_sndbuf:
if (optlen != sizeof(struct sock_txtime)) {
ret = -EINVAL;
break;
- } else if (copy_from_user(&sk_txtime, optval,
+ } else if (copy_from_sockptr(&sk_txtime, optval,
sizeof(struct sock_txtime))) {
ret = -EFAULT;
break;
diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c
index 979dfcd2aa14..7246847efa90 100644
--- a/net/mptcp/protocol.c
+++ b/net/mptcp/protocol.c
@@ -1648,7 +1648,8 @@ static int mptcp_setsockopt_sol_socket(struct mptcp_sock *msk, int optname,
return -EINVAL;
}
- ret = sock_setsockopt(ssock, SOL_SOCKET, optname, optval, optlen);
+ ret = sock_setsockopt(ssock, SOL_SOCKET, optname,
+ USER_SOCKPTR(optval), optlen);
if (ret == 0) {
if (optname == SO_REUSEPORT)
sk->sk_reuseport = ssock->sk->sk_reuseport;
@@ -1659,7 +1660,8 @@ static int mptcp_setsockopt_sol_socket(struct mptcp_sock *msk, int optname,
return ret;
}
- return sock_setsockopt(sk->sk_socket, SOL_SOCKET, optname, optval, optlen);
+ return sock_setsockopt(sk->sk_socket, SOL_SOCKET, optname,
+ USER_SOCKPTR(optval), optlen);
}
static int mptcp_setsockopt_v6(struct mptcp_sock *msk, int optname,
diff --git a/net/socket.c b/net/socket.c
index 93846568c2fb..c97f83d879ae 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -2130,7 +2130,8 @@ int __sys_setsockopt(int fd, int level, int optname, char __user *optval,
}
if (level == SOL_SOCKET && !sock_use_custom_sol_socket(sock))
- err = sock_setsockopt(sock, level, optname, optval, optlen);
+ err = sock_setsockopt(sock, level, optname,
+ USER_SOCKPTR(optval), optlen);
else if (unlikely(!sock->ops->setsockopt))
err = -EOPNOTSUPP;
else