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authorChristoph Hellwig <hch@lst.de>2020-07-23 08:09:07 +0200
committerDavid S. Miller <davem@davemloft.net>2020-07-24 15:41:54 -0700
commita7b75c5a8c41445f33efb663887ff5f5c3b4454b (patch)
treea87e011ba3a0d76fda030b3a62080caa97fae1ef /net/packet
parentd38d2b00ba64b3f2f30d70a7929000606d2c4509 (diff)
downloadlinux-a7b75c5a8c41445f33efb663887ff5f5c3b4454b.tar.bz2
net: pass a sockptr_t into ->setsockopt
Rework the remaining setsockopt code to pass a sockptr_t instead of a plain user pointer. This removes the last remaining set_fs(KERNEL_DS) outside of architecture specific code. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Stefan Schmidt <stefan@datenfreihafen.org> [ieee802154] Acked-by: Matthieu Baerts <matthieu.baerts@tessares.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/packet')
-rw-r--r--net/packet/af_packet.c39
1 files changed, 20 insertions, 19 deletions
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index d8d4f78f78e4..0b8160d1a6e0 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -1558,7 +1558,7 @@ static int fanout_set_data_cbpf(struct packet_sock *po, sockptr_t data,
return 0;
}
-static int fanout_set_data_ebpf(struct packet_sock *po, char __user *data,
+static int fanout_set_data_ebpf(struct packet_sock *po, sockptr_t data,
unsigned int len)
{
struct bpf_prog *new;
@@ -1568,7 +1568,7 @@ static int fanout_set_data_ebpf(struct packet_sock *po, char __user *data,
return -EPERM;
if (len != sizeof(fd))
return -EINVAL;
- if (copy_from_user(&fd, data, len))
+ if (copy_from_sockptr(&fd, data, len))
return -EFAULT;
new = bpf_prog_get_type(fd, BPF_PROG_TYPE_SOCKET_FILTER);
@@ -1579,12 +1579,12 @@ static int fanout_set_data_ebpf(struct packet_sock *po, char __user *data,
return 0;
}
-static int fanout_set_data(struct packet_sock *po, char __user *data,
+static int fanout_set_data(struct packet_sock *po, sockptr_t data,
unsigned int len)
{
switch (po->fanout->type) {
case PACKET_FANOUT_CBPF:
- return fanout_set_data_cbpf(po, USER_SOCKPTR(data), len);
+ return fanout_set_data_cbpf(po, data, len);
case PACKET_FANOUT_EBPF:
return fanout_set_data_ebpf(po, data, len);
default:
@@ -3652,7 +3652,8 @@ static void packet_flush_mclist(struct sock *sk)
}
static int
-packet_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen)
+packet_setsockopt(struct socket *sock, int level, int optname, sockptr_t optval,
+ unsigned int optlen)
{
struct sock *sk = sock->sk;
struct packet_sock *po = pkt_sk(sk);
@@ -3672,7 +3673,7 @@ packet_setsockopt(struct socket *sock, int level, int optname, char __user *optv
return -EINVAL;
if (len > sizeof(mreq))
len = sizeof(mreq);
- if (copy_from_user(&mreq, optval, len))
+ if (copy_from_sockptr(&mreq, optval, len))
return -EFAULT;
if (len < (mreq.mr_alen + offsetof(struct packet_mreq, mr_address)))
return -EINVAL;
@@ -3703,7 +3704,7 @@ packet_setsockopt(struct socket *sock, int level, int optname, char __user *optv
if (optlen < len) {
ret = -EINVAL;
} else {
- if (copy_from_user(&req_u.req, optval, len))
+ if (copy_from_sockptr(&req_u.req, optval, len))
ret = -EFAULT;
else
ret = packet_set_ring(sk, &req_u, 0,
@@ -3718,7 +3719,7 @@ packet_setsockopt(struct socket *sock, int level, int optname, char __user *optv
if (optlen != sizeof(val))
return -EINVAL;
- if (copy_from_user(&val, optval, sizeof(val)))
+ if (copy_from_sockptr(&val, optval, sizeof(val)))
return -EFAULT;
pkt_sk(sk)->copy_thresh = val;
@@ -3730,7 +3731,7 @@ packet_setsockopt(struct socket *sock, int level, int optname, char __user *optv
if (optlen != sizeof(val))
return -EINVAL;
- if (copy_from_user(&val, optval, sizeof(val)))
+ if (copy_from_sockptr(&val, optval, sizeof(val)))
return -EFAULT;
switch (val) {
case TPACKET_V1:
@@ -3756,7 +3757,7 @@ packet_setsockopt(struct socket *sock, int level, int optname, char __user *optv
if (optlen != sizeof(val))
return -EINVAL;
- if (copy_from_user(&val, optval, sizeof(val)))
+ if (copy_from_sockptr(&val, optval, sizeof(val)))
return -EFAULT;
if (val > INT_MAX)
return -EINVAL;
@@ -3776,7 +3777,7 @@ packet_setsockopt(struct socket *sock, int level, int optname, char __user *optv
if (optlen != sizeof(val))
return -EINVAL;
- if (copy_from_user(&val, optval, sizeof(val)))
+ if (copy_from_sockptr(&val, optval, sizeof(val)))
return -EFAULT;
lock_sock(sk);
@@ -3795,7 +3796,7 @@ packet_setsockopt(struct socket *sock, int level, int optname, char __user *optv
if (optlen < sizeof(val))
return -EINVAL;
- if (copy_from_user(&val, optval, sizeof(val)))
+ if (copy_from_sockptr(&val, optval, sizeof(val)))
return -EFAULT;
lock_sock(sk);
@@ -3809,7 +3810,7 @@ packet_setsockopt(struct socket *sock, int level, int optname, char __user *optv
if (optlen < sizeof(val))
return -EINVAL;
- if (copy_from_user(&val, optval, sizeof(val)))
+ if (copy_from_sockptr(&val, optval, sizeof(val)))
return -EFAULT;
lock_sock(sk);
@@ -3825,7 +3826,7 @@ packet_setsockopt(struct socket *sock, int level, int optname, char __user *optv
return -EINVAL;
if (optlen < sizeof(val))
return -EINVAL;
- if (copy_from_user(&val, optval, sizeof(val)))
+ if (copy_from_sockptr(&val, optval, sizeof(val)))
return -EFAULT;
lock_sock(sk);
@@ -3844,7 +3845,7 @@ packet_setsockopt(struct socket *sock, int level, int optname, char __user *optv
if (optlen != sizeof(val))
return -EINVAL;
- if (copy_from_user(&val, optval, sizeof(val)))
+ if (copy_from_sockptr(&val, optval, sizeof(val)))
return -EFAULT;
po->tp_tstamp = val;
@@ -3856,7 +3857,7 @@ packet_setsockopt(struct socket *sock, int level, int optname, char __user *optv
if (optlen != sizeof(val))
return -EINVAL;
- if (copy_from_user(&val, optval, sizeof(val)))
+ if (copy_from_sockptr(&val, optval, sizeof(val)))
return -EFAULT;
return fanout_add(sk, val & 0xffff, val >> 16);
@@ -3874,7 +3875,7 @@ packet_setsockopt(struct socket *sock, int level, int optname, char __user *optv
if (optlen != sizeof(val))
return -EINVAL;
- if (copy_from_user(&val, optval, sizeof(val)))
+ if (copy_from_sockptr(&val, optval, sizeof(val)))
return -EFAULT;
if (val < 0 || val > 1)
return -EINVAL;
@@ -3888,7 +3889,7 @@ packet_setsockopt(struct socket *sock, int level, int optname, char __user *optv
if (optlen != sizeof(val))
return -EINVAL;
- if (copy_from_user(&val, optval, sizeof(val)))
+ if (copy_from_sockptr(&val, optval, sizeof(val)))
return -EFAULT;
lock_sock(sk);
@@ -3907,7 +3908,7 @@ packet_setsockopt(struct socket *sock, int level, int optname, char __user *optv
if (optlen != sizeof(val))
return -EINVAL;
- if (copy_from_user(&val, optval, sizeof(val)))
+ if (copy_from_sockptr(&val, optval, sizeof(val)))
return -EFAULT;
po->xmit = val ? packet_direct_xmit : dev_queue_xmit;