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Message-Id: <20200723060908.50081-17-hch@lst.de>
Date: Thu, 23 Jul 2020 08:08:58 +0200
From: Christoph Hellwig <hch@....de>
To: "David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
Alexei Starovoitov <ast@...nel.org>,
Daniel Borkmann <daniel@...earbox.net>,
Alexey Kuznetsov <kuznet@....inr.ac.ru>,
Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
Eric Dumazet <edumazet@...gle.com>
Cc: linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org,
netdev@...r.kernel.org, bpf@...r.kernel.org,
netfilter-devel@...r.kernel.org, coreteam@...filter.org,
linux-sctp@...r.kernel.org, linux-hams@...r.kernel.org,
linux-bluetooth@...r.kernel.org, bridge@...ts.linux-foundation.org,
linux-can@...r.kernel.org, dccp@...r.kernel.org,
linux-decnet-user@...ts.sourceforge.net,
linux-wpan@...r.kernel.org, linux-s390@...r.kernel.org,
mptcp@...ts.01.org, lvs-devel@...r.kernel.org,
rds-devel@....oracle.com, linux-afs@...ts.infradead.org,
tipc-discussion@...ts.sourceforge.net, linux-x25@...r.kernel.org
Subject: [PATCH 16/26] net/ipv4: switch do_ip_setsockopt 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@....de>
---
net/ipv4/ip_sockglue.c | 68 ++++++++++++++++++++----------------------
1 file changed, 33 insertions(+), 35 deletions(-)
diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c
index b12f39b52008a3..f7f1507b89fe24 100644
--- a/net/ipv4/ip_sockglue.c
+++ b/net/ipv4/ip_sockglue.c
@@ -683,15 +683,15 @@ static int set_mcast_msfilter(struct sock *sk, int ifindex,
return -EADDRNOTAVAIL;
}
-static int copy_group_source_from_user(struct group_source_req *greqs,
- void __user *optval, int optlen)
+static int copy_group_source_from_sockptr(struct group_source_req *greqs,
+ sockptr_t optval, int optlen)
{
if (in_compat_syscall()) {
struct compat_group_source_req gr32;
if (optlen != sizeof(gr32))
return -EINVAL;
- if (copy_from_user(&gr32, optval, sizeof(gr32)))
+ if (copy_from_sockptr(&gr32, optval, sizeof(gr32)))
return -EFAULT;
greqs->gsr_interface = gr32.gsr_interface;
greqs->gsr_group = gr32.gsr_group;
@@ -699,7 +699,7 @@ static int copy_group_source_from_user(struct group_source_req *greqs,
} else {
if (optlen != sizeof(*greqs))
return -EINVAL;
- if (copy_from_user(greqs, optval, sizeof(*greqs)))
+ if (copy_from_sockptr(greqs, optval, sizeof(*greqs)))
return -EFAULT;
}
@@ -707,14 +707,14 @@ static int copy_group_source_from_user(struct group_source_req *greqs,
}
static int do_mcast_group_source(struct sock *sk, int optname,
- void __user *optval, int optlen)
+ sockptr_t optval, int optlen)
{
struct group_source_req greqs;
struct ip_mreq_source mreqs;
struct sockaddr_in *psin;
int omode, add, err;
- err = copy_group_source_from_user(&greqs, optval, optlen);
+ err = copy_group_source_from_sockptr(&greqs, optval, optlen);
if (err)
return err;
@@ -754,8 +754,7 @@ static int do_mcast_group_source(struct sock *sk, int optname,
return ip_mc_source(add, omode, sk, &mreqs, greqs.gsr_interface);
}
-static int ip_set_mcast_msfilter(struct sock *sk, void __user *optval,
- int optlen)
+static int ip_set_mcast_msfilter(struct sock *sk, sockptr_t optval, int optlen)
{
struct group_filter *gsf = NULL;
int err;
@@ -765,7 +764,7 @@ static int ip_set_mcast_msfilter(struct sock *sk, void __user *optval,
if (optlen > sysctl_optmem_max)
return -ENOBUFS;
- gsf = memdup_user(optval, optlen);
+ gsf = memdup_sockptr(optval, optlen);
if (IS_ERR(gsf))
return PTR_ERR(gsf);
@@ -786,7 +785,7 @@ static int ip_set_mcast_msfilter(struct sock *sk, void __user *optval,
return err;
}
-static int compat_ip_set_mcast_msfilter(struct sock *sk, void __user *optval,
+static int compat_ip_set_mcast_msfilter(struct sock *sk, sockptr_t optval,
int optlen)
{
const int size0 = offsetof(struct compat_group_filter, gf_slist);
@@ -806,7 +805,7 @@ static int compat_ip_set_mcast_msfilter(struct sock *sk, void __user *optval,
gf32 = p + 4; /* we want ->gf_group and ->gf_slist aligned */
err = -EFAULT;
- if (copy_from_user(gf32, optval, optlen))
+ if (copy_from_sockptr(gf32, optval, optlen))
goto out_free_gsf;
/* numsrc >= (4G-140)/128 overflow in 32 bits */
@@ -831,7 +830,7 @@ static int compat_ip_set_mcast_msfilter(struct sock *sk, void __user *optval,
}
static int ip_mcast_join_leave(struct sock *sk, int optname,
- void __user *optval, int optlen)
+ sockptr_t optval, int optlen)
{
struct ip_mreqn mreq = { };
struct sockaddr_in *psin;
@@ -839,7 +838,7 @@ static int ip_mcast_join_leave(struct sock *sk, int optname,
if (optlen < sizeof(struct group_req))
return -EINVAL;
- if (copy_from_user(&greq, optval, sizeof(greq)))
+ if (copy_from_sockptr(&greq, optval, sizeof(greq)))
return -EFAULT;
psin = (struct sockaddr_in *)&greq.gr_group;
@@ -853,7 +852,7 @@ static int ip_mcast_join_leave(struct sock *sk, int optname,
}
static int compat_ip_mcast_join_leave(struct sock *sk, int optname,
- void __user *optval, int optlen)
+ sockptr_t optval, int optlen)
{
struct compat_group_req greq;
struct ip_mreqn mreq = { };
@@ -861,7 +860,7 @@ static int compat_ip_mcast_join_leave(struct sock *sk, int optname,
if (optlen < sizeof(struct compat_group_req))
return -EINVAL;
- if (copy_from_user(&greq, optval, sizeof(greq)))
+ if (copy_from_sockptr(&greq, optval, sizeof(greq)))
return -EFAULT;
psin = (struct sockaddr_in *)&greq.gr_group;
@@ -875,8 +874,8 @@ static int compat_ip_mcast_join_leave(struct sock *sk, int optname,
return ip_mc_leave_group(sk, &mreq);
}
-static int do_ip_setsockopt(struct sock *sk, int level,
- int optname, char __user *optval, unsigned int optlen)
+static int do_ip_setsockopt(struct sock *sk, int level, int optname,
+ sockptr_t optval, unsigned int optlen)
{
struct inet_sock *inet = inet_sk(sk);
struct net *net = sock_net(sk);
@@ -910,12 +909,12 @@ static int do_ip_setsockopt(struct sock *sk, int level,
case IP_RECVFRAGSIZE:
case IP_RECVERR_RFC4884:
if (optlen >= sizeof(int)) {
- if (get_user(val, (int __user *) optval))
+ if (copy_from_sockptr(&val, optval, sizeof(val)))
return -EFAULT;
} else if (optlen >= sizeof(char)) {
unsigned char ucval;
- if (get_user(ucval, (unsigned char __user *) optval))
+ if (copy_from_sockptr(&ucval, optval, sizeof(ucval)))
return -EFAULT;
val = (int) ucval;
}
@@ -926,8 +925,7 @@ static int do_ip_setsockopt(struct sock *sk, int level,
if (optname == IP_ROUTER_ALERT)
return ip_ra_control(sk, val ? 1 : 0, NULL);
if (ip_mroute_opt(optname))
- return ip_mroute_setsockopt(sk, optname, USER_SOCKPTR(optval),
- optlen);
+ return ip_mroute_setsockopt(sk, optname, optval, optlen);
err = 0;
if (needs_rtnl)
@@ -941,8 +939,7 @@ static int do_ip_setsockopt(struct sock *sk, int level,
if (optlen > 40)
goto e_inval;
- err = ip_options_get(sock_net(sk), &opt, USER_SOCKPTR(optval),
- optlen);
+ err = ip_options_get(sock_net(sk), &opt, optval, optlen);
if (err)
break;
old = rcu_dereference_protected(inet->inet_opt,
@@ -1140,17 +1137,17 @@ static int do_ip_setsockopt(struct sock *sk, int level,
err = -EFAULT;
if (optlen >= sizeof(struct ip_mreqn)) {
- if (copy_from_user(&mreq, optval, sizeof(mreq)))
+ if (copy_from_sockptr(&mreq, optval, sizeof(mreq)))
break;
} else {
memset(&mreq, 0, sizeof(mreq));
if (optlen >= sizeof(struct ip_mreq)) {
- if (copy_from_user(&mreq, optval,
- sizeof(struct ip_mreq)))
+ if (copy_from_sockptr(&mreq, optval,
+ sizeof(struct ip_mreq)))
break;
} else if (optlen >= sizeof(struct in_addr)) {
- if (copy_from_user(&mreq.imr_address, optval,
- sizeof(struct in_addr)))
+ if (copy_from_sockptr(&mreq.imr_address, optval,
+ sizeof(struct in_addr)))
break;
}
}
@@ -1202,11 +1199,12 @@ static int do_ip_setsockopt(struct sock *sk, int level,
goto e_inval;
err = -EFAULT;
if (optlen >= sizeof(struct ip_mreqn)) {
- if (copy_from_user(&mreq, optval, sizeof(mreq)))
+ if (copy_from_sockptr(&mreq, optval, sizeof(mreq)))
break;
} else {
memset(&mreq, 0, sizeof(mreq));
- if (copy_from_user(&mreq, optval, sizeof(struct ip_mreq)))
+ if (copy_from_sockptr(&mreq, optval,
+ sizeof(struct ip_mreq)))
break;
}
@@ -1226,7 +1224,7 @@ static int do_ip_setsockopt(struct sock *sk, int level,
err = -ENOBUFS;
break;
}
- msf = memdup_user(optval, optlen);
+ msf = memdup_sockptr(optval, optlen);
if (IS_ERR(msf)) {
err = PTR_ERR(msf);
break;
@@ -1257,7 +1255,7 @@ static int do_ip_setsockopt(struct sock *sk, int level,
if (optlen != sizeof(struct ip_mreq_source))
goto e_inval;
- if (copy_from_user(&mreqs, optval, sizeof(mreqs))) {
+ if (copy_from_sockptr(&mreqs, optval, sizeof(mreqs))) {
err = -EFAULT;
break;
}
@@ -1324,8 +1322,7 @@ static int do_ip_setsockopt(struct sock *sk, int level,
err = -EPERM;
if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
break;
- err = xfrm_user_policy(sk, optname, USER_SOCKPTR(optval),
- optlen);
+ err = xfrm_user_policy(sk, optname, optval, optlen);
break;
case IP_TRANSPARENT:
@@ -1412,7 +1409,8 @@ int ip_setsockopt(struct sock *sk, int level,
if (level != SOL_IP)
return -ENOPROTOOPT;
- err = do_ip_setsockopt(sk, level, optname, optval, optlen);
+ err = do_ip_setsockopt(sk, level, optname, USER_SOCKPTR(optval),
+ optlen);
#if IS_ENABLED(CONFIG_BPFILTER_UMH)
if (optname >= BPFILTER_IPT_SO_SET_REPLACE &&
optname < BPFILTER_IPT_SET_MAX)
--
2.27.0
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