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Message-Id: <20200723060908.50081-13-hch@lst.de>
Date: Thu, 23 Jul 2020 08:08:54 +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 12/26] netfilter: switch nf_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>
---
include/linux/netfilter.h | 6 ++++--
net/bridge/netfilter/ebtables.c | 37 +++++++++++++++------------------
net/decnet/af_decnet.c | 3 ++-
net/ipv4/ip_sockglue.c | 3 ++-
net/ipv4/netfilter/arp_tables.c | 28 ++++++++++++-------------
net/ipv4/netfilter/ip_tables.c | 24 ++++++++++-----------
net/ipv6/ipv6_sockglue.c | 3 ++-
net/ipv6/netfilter/ip6_tables.c | 24 ++++++++++-----------
net/netfilter/ipvs/ip_vs_ctl.c | 4 ++--
net/netfilter/nf_sockopt.c | 2 +-
10 files changed, 68 insertions(+), 66 deletions(-)
diff --git a/include/linux/netfilter.h b/include/linux/netfilter.h
index 711b4d4486f042..0101747de54936 100644
--- a/include/linux/netfilter.h
+++ b/include/linux/netfilter.h
@@ -13,6 +13,7 @@
#include <linux/static_key.h>
#include <linux/netfilter_defs.h>
#include <linux/netdevice.h>
+#include <linux/sockptr.h>
#include <net/net_namespace.h>
static inline int NF_DROP_GETERR(int verdict)
@@ -163,7 +164,8 @@ struct nf_sockopt_ops {
/* Non-inclusive ranges: use 0/0/NULL to never get called. */
int set_optmin;
int set_optmax;
- int (*set)(struct sock *sk, int optval, void __user *user, unsigned int len);
+ int (*set)(struct sock *sk, int optval, sockptr_t arg,
+ unsigned int len);
int get_optmin;
int get_optmax;
int (*get)(struct sock *sk, int optval, void __user *user, int *len);
@@ -338,7 +340,7 @@ NF_HOOK_LIST(uint8_t pf, unsigned int hook, struct net *net, struct sock *sk,
}
/* Call setsockopt() */
-int nf_setsockopt(struct sock *sk, u_int8_t pf, int optval, char __user *opt,
+int nf_setsockopt(struct sock *sk, u_int8_t pf, int optval, sockptr_t opt,
unsigned int len);
int nf_getsockopt(struct sock *sk, u_int8_t pf, int optval, char __user *opt,
int *len);
diff --git a/net/bridge/netfilter/ebtables.c b/net/bridge/netfilter/ebtables.c
index 12f8929667bf43..d35173e803d3fe 100644
--- a/net/bridge/netfilter/ebtables.c
+++ b/net/bridge/netfilter/ebtables.c
@@ -1063,14 +1063,13 @@ static int do_replace_finish(struct net *net, struct ebt_replace *repl,
}
/* replace the table */
-static int do_replace(struct net *net, const void __user *user,
- unsigned int len)
+static int do_replace(struct net *net, sockptr_t arg, unsigned int len)
{
int ret, countersize;
struct ebt_table_info *newinfo;
struct ebt_replace tmp;
- if (copy_from_user(&tmp, user, sizeof(tmp)) != 0)
+ if (copy_from_sockptr(&tmp, arg, sizeof(tmp)) != 0)
return -EFAULT;
if (len != sizeof(tmp) + tmp.entries_size)
@@ -1286,12 +1285,11 @@ static int do_update_counters(struct net *net, const char *name,
return ret;
}
-static int update_counters(struct net *net, const void __user *user,
- unsigned int len)
+static int update_counters(struct net *net, sockptr_t arg, unsigned int len)
{
struct ebt_replace hlp;
- if (copy_from_user(&hlp, user, sizeof(hlp)))
+ if (copy_from_sockptr(&hlp, arg, sizeof(hlp)))
return -EFAULT;
if (len != sizeof(hlp) + hlp.num_counters * sizeof(struct ebt_counter))
@@ -2079,7 +2077,7 @@ static int compat_copy_entries(unsigned char *data, unsigned int size_user,
static int compat_copy_ebt_replace_from_user(struct ebt_replace *repl,
- void __user *user, unsigned int len)
+ sockptr_t arg, unsigned int len)
{
struct compat_ebt_replace tmp;
int i;
@@ -2087,7 +2085,7 @@ static int compat_copy_ebt_replace_from_user(struct ebt_replace *repl,
if (len < sizeof(tmp))
return -EINVAL;
- if (copy_from_user(&tmp, user, sizeof(tmp)))
+ if (copy_from_sockptr(&tmp, arg, sizeof(tmp)))
return -EFAULT;
if (len != sizeof(tmp) + tmp.entries_size)
@@ -2114,8 +2112,7 @@ static int compat_copy_ebt_replace_from_user(struct ebt_replace *repl,
return 0;
}
-static int compat_do_replace(struct net *net, void __user *user,
- unsigned int len)
+static int compat_do_replace(struct net *net, sockptr_t arg, unsigned int len)
{
int ret, i, countersize, size64;
struct ebt_table_info *newinfo;
@@ -2123,10 +2120,10 @@ static int compat_do_replace(struct net *net, void __user *user,
struct ebt_entries_buf_state state;
void *entries_tmp;
- ret = compat_copy_ebt_replace_from_user(&tmp, user, len);
+ ret = compat_copy_ebt_replace_from_user(&tmp, arg, len);
if (ret) {
/* try real handler in case userland supplied needed padding */
- if (ret == -EINVAL && do_replace(net, user, len) == 0)
+ if (ret == -EINVAL && do_replace(net, arg, len) == 0)
ret = 0;
return ret;
}
@@ -2217,17 +2214,17 @@ static int compat_do_replace(struct net *net, void __user *user,
goto free_entries;
}
-static int compat_update_counters(struct net *net, void __user *user,
+static int compat_update_counters(struct net *net, sockptr_t arg,
unsigned int len)
{
struct compat_ebt_replace hlp;
- if (copy_from_user(&hlp, user, sizeof(hlp)))
+ if (copy_from_sockptr(&hlp, arg, sizeof(hlp)))
return -EFAULT;
/* try real handler in case userland supplied needed padding */
if (len != sizeof(hlp) + hlp.num_counters * sizeof(struct ebt_counter))
- return update_counters(net, user, len);
+ return update_counters(net, arg, len);
return do_update_counters(net, hlp.name, compat_ptr(hlp.counters),
hlp.num_counters, len);
@@ -2368,7 +2365,7 @@ static int do_ebt_get_ctl(struct sock *sk, int cmd, void __user *user, int *len)
return ret;
}
-static int do_ebt_set_ctl(struct sock *sk, int cmd, void __user *user,
+static int do_ebt_set_ctl(struct sock *sk, int cmd, sockptr_t arg,
unsigned int len)
{
struct net *net = sock_net(sk);
@@ -2381,18 +2378,18 @@ static int do_ebt_set_ctl(struct sock *sk, int cmd, void __user *user,
case EBT_SO_SET_ENTRIES:
#ifdef CONFIG_COMPAT
if (in_compat_syscall())
- ret = compat_do_replace(net, user, len);
+ ret = compat_do_replace(net, arg, len);
else
#endif
- ret = do_replace(net, user, len);
+ ret = do_replace(net, arg, len);
break;
case EBT_SO_SET_COUNTERS:
#ifdef CONFIG_COMPAT
if (in_compat_syscall())
- ret = compat_update_counters(net, user, len);
+ ret = compat_update_counters(net, arg, len);
else
#endif
- ret = update_counters(net, user, len);
+ ret = update_counters(net, arg, len);
break;
default:
ret = -EINVAL;
diff --git a/net/decnet/af_decnet.c b/net/decnet/af_decnet.c
index 7d7ae2dd69b8ad..7d51ab608fb3f1 100644
--- a/net/decnet/af_decnet.c
+++ b/net/decnet/af_decnet.c
@@ -1332,7 +1332,8 @@ static int dn_setsockopt(struct socket *sock, int level, int optname, char __use
/* we need to exclude all possible ENOPROTOOPTs except default case */
if (err == -ENOPROTOOPT && optname != DSO_LINKINFO &&
optname != DSO_STREAM && optname != DSO_SEQPACKET)
- err = nf_setsockopt(sk, PF_DECnet, optname, optval, optlen);
+ err = nf_setsockopt(sk, PF_DECnet, optname,
+ USER_SOCKPTR(optval), optlen);
#endif
return err;
diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c
index da933f99b5d517..42befbf12846c0 100644
--- a/net/ipv4/ip_sockglue.c
+++ b/net/ipv4/ip_sockglue.c
@@ -1422,7 +1422,8 @@ int ip_setsockopt(struct sock *sk, int level,
optname != IP_IPSEC_POLICY &&
optname != IP_XFRM_POLICY &&
!ip_mroute_opt(optname))
- err = nf_setsockopt(sk, PF_INET, optname, optval, optlen);
+ err = nf_setsockopt(sk, PF_INET, optname, USER_SOCKPTR(optval),
+ optlen);
#endif
return err;
}
diff --git a/net/ipv4/netfilter/arp_tables.c b/net/ipv4/netfilter/arp_tables.c
index 6d24b686c7f00a..f5b26ef1782001 100644
--- a/net/ipv4/netfilter/arp_tables.c
+++ b/net/ipv4/netfilter/arp_tables.c
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0-only
+
/*
* Packet matching code for ARP packets.
*
@@ -947,8 +947,7 @@ static int __do_replace(struct net *net, const char *name,
return ret;
}
-static int do_replace(struct net *net, const void __user *user,
- unsigned int len)
+static int do_replace(struct net *net, sockptr_t arg, unsigned int len)
{
int ret;
struct arpt_replace tmp;
@@ -956,7 +955,7 @@ static int do_replace(struct net *net, const void __user *user,
void *loc_cpu_entry;
struct arpt_entry *iter;
- if (copy_from_user(&tmp, user, sizeof(tmp)) != 0)
+ if (copy_from_sockptr(&tmp, arg, sizeof(tmp)) != 0)
return -EFAULT;
/* overflow check */
@@ -972,8 +971,8 @@ static int do_replace(struct net *net, const void __user *user,
return -ENOMEM;
loc_cpu_entry = newinfo->entries;
- if (copy_from_user(loc_cpu_entry, user + sizeof(tmp),
- tmp.size) != 0) {
+ sockptr_advance(arg, sizeof(tmp));
+ if (copy_from_sockptr(loc_cpu_entry, arg, tmp.size) != 0) {
ret = -EFAULT;
goto free_newinfo;
}
@@ -1244,8 +1243,7 @@ static int translate_compat_table(struct net *net,
return ret;
}
-static int compat_do_replace(struct net *net, void __user *user,
- unsigned int len)
+static int compat_do_replace(struct net *net, sockptr_t arg, unsigned int len)
{
int ret;
struct compat_arpt_replace tmp;
@@ -1253,7 +1251,7 @@ static int compat_do_replace(struct net *net, void __user *user,
void *loc_cpu_entry;
struct arpt_entry *iter;
- if (copy_from_user(&tmp, user, sizeof(tmp)) != 0)
+ if (copy_from_sockptr(&tmp, arg, sizeof(tmp)) != 0)
return -EFAULT;
/* overflow check */
@@ -1269,7 +1267,8 @@ static int compat_do_replace(struct net *net, void __user *user,
return -ENOMEM;
loc_cpu_entry = newinfo->entries;
- if (copy_from_user(loc_cpu_entry, user + sizeof(tmp), tmp.size) != 0) {
+ sockptr_advance(arg, sizeof(tmp));
+ if (copy_from_sockptr(loc_cpu_entry, arg, tmp.size) != 0) {
ret = -EFAULT;
goto free_newinfo;
}
@@ -1401,7 +1400,8 @@ static int compat_get_entries(struct net *net,
}
#endif
-static int do_arpt_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len)
+static int do_arpt_set_ctl(struct sock *sk, int cmd, sockptr_t arg,
+ unsigned int len)
{
int ret;
@@ -1412,14 +1412,14 @@ static int do_arpt_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned
case ARPT_SO_SET_REPLACE:
#ifdef CONFIG_COMPAT
if (in_compat_syscall())
- ret = compat_do_replace(sock_net(sk), user, len);
+ ret = compat_do_replace(sock_net(sk), arg, len);
else
#endif
- ret = do_replace(sock_net(sk), user, len);
+ ret = do_replace(sock_net(sk), arg, len);
break;
case ARPT_SO_SET_ADD_COUNTERS:
- ret = do_add_counters(sock_net(sk), USER_SOCKPTR(user), len);
+ ret = do_add_counters(sock_net(sk), arg, len);
break;
default:
diff --git a/net/ipv4/netfilter/ip_tables.c b/net/ipv4/netfilter/ip_tables.c
index 4697d09c98dc3e..f2a9680303d8c0 100644
--- a/net/ipv4/netfilter/ip_tables.c
+++ b/net/ipv4/netfilter/ip_tables.c
@@ -1102,7 +1102,7 @@ __do_replace(struct net *net, const char *name, unsigned int valid_hooks,
}
static int
-do_replace(struct net *net, const void __user *user, unsigned int len)
+do_replace(struct net *net, sockptr_t arg, unsigned int len)
{
int ret;
struct ipt_replace tmp;
@@ -1110,7 +1110,7 @@ do_replace(struct net *net, const void __user *user, unsigned int len)
void *loc_cpu_entry;
struct ipt_entry *iter;
- if (copy_from_user(&tmp, user, sizeof(tmp)) != 0)
+ if (copy_from_sockptr(&tmp, arg, sizeof(tmp)) != 0)
return -EFAULT;
/* overflow check */
@@ -1126,8 +1126,8 @@ do_replace(struct net *net, const void __user *user, unsigned int len)
return -ENOMEM;
loc_cpu_entry = newinfo->entries;
- if (copy_from_user(loc_cpu_entry, user + sizeof(tmp),
- tmp.size) != 0) {
+ sockptr_advance(arg, sizeof(tmp));
+ if (copy_from_sockptr(loc_cpu_entry, arg, tmp.size) != 0) {
ret = -EFAULT;
goto free_newinfo;
}
@@ -1484,7 +1484,7 @@ translate_compat_table(struct net *net,
}
static int
-compat_do_replace(struct net *net, void __user *user, unsigned int len)
+compat_do_replace(struct net *net, sockptr_t arg, unsigned int len)
{
int ret;
struct compat_ipt_replace tmp;
@@ -1492,7 +1492,7 @@ compat_do_replace(struct net *net, void __user *user, unsigned int len)
void *loc_cpu_entry;
struct ipt_entry *iter;
- if (copy_from_user(&tmp, user, sizeof(tmp)) != 0)
+ if (copy_from_sockptr(&tmp, arg, sizeof(tmp)) != 0)
return -EFAULT;
/* overflow check */
@@ -1508,8 +1508,8 @@ compat_do_replace(struct net *net, void __user *user, unsigned int len)
return -ENOMEM;
loc_cpu_entry = newinfo->entries;
- if (copy_from_user(loc_cpu_entry, user + sizeof(tmp),
- tmp.size) != 0) {
+ sockptr_advance(arg, sizeof(tmp));
+ if (copy_from_sockptr(loc_cpu_entry, arg, tmp.size) != 0) {
ret = -EFAULT;
goto free_newinfo;
}
@@ -1610,7 +1610,7 @@ compat_get_entries(struct net *net, struct compat_ipt_get_entries __user *uptr,
#endif
static int
-do_ipt_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len)
+do_ipt_set_ctl(struct sock *sk, int cmd, sockptr_t arg, unsigned int len)
{
int ret;
@@ -1621,14 +1621,14 @@ do_ipt_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len)
case IPT_SO_SET_REPLACE:
#ifdef CONFIG_COMPAT
if (in_compat_syscall())
- ret = compat_do_replace(sock_net(sk), user, len);
+ ret = compat_do_replace(sock_net(sk), arg, len);
else
#endif
- ret = do_replace(sock_net(sk), user, len);
+ ret = do_replace(sock_net(sk), arg, len);
break;
case IPT_SO_SET_ADD_COUNTERS:
- ret = do_add_counters(sock_net(sk), USER_SOCKPTR(user), len);
+ ret = do_add_counters(sock_net(sk), arg, len);
break;
default:
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index 56a74707c61741..85892b35cff7b3 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -996,7 +996,8 @@ int ipv6_setsockopt(struct sock *sk, int level, int optname,
/* we need to exclude all possible ENOPROTOOPTs except default case */
if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&
optname != IPV6_XFRM_POLICY)
- err = nf_setsockopt(sk, PF_INET6, optname, optval, optlen);
+ err = nf_setsockopt(sk, PF_INET6, optname, USER_SOCKPTR(optval),
+ optlen);
#endif
return err;
}
diff --git a/net/ipv6/netfilter/ip6_tables.c b/net/ipv6/netfilter/ip6_tables.c
index a787aba30e2db7..1d52957a413f4a 100644
--- a/net/ipv6/netfilter/ip6_tables.c
+++ b/net/ipv6/netfilter/ip6_tables.c
@@ -1119,7 +1119,7 @@ __do_replace(struct net *net, const char *name, unsigned int valid_hooks,
}
static int
-do_replace(struct net *net, const void __user *user, unsigned int len)
+do_replace(struct net *net, sockptr_t arg, unsigned int len)
{
int ret;
struct ip6t_replace tmp;
@@ -1127,7 +1127,7 @@ do_replace(struct net *net, const void __user *user, unsigned int len)
void *loc_cpu_entry;
struct ip6t_entry *iter;
- if (copy_from_user(&tmp, user, sizeof(tmp)) != 0)
+ if (copy_from_sockptr(&tmp, arg, sizeof(tmp)) != 0)
return -EFAULT;
/* overflow check */
@@ -1143,8 +1143,8 @@ do_replace(struct net *net, const void __user *user, unsigned int len)
return -ENOMEM;
loc_cpu_entry = newinfo->entries;
- if (copy_from_user(loc_cpu_entry, user + sizeof(tmp),
- tmp.size) != 0) {
+ sockptr_advance(arg, sizeof(tmp));
+ if (copy_from_sockptr(loc_cpu_entry, arg, tmp.size) != 0) {
ret = -EFAULT;
goto free_newinfo;
}
@@ -1493,7 +1493,7 @@ translate_compat_table(struct net *net,
}
static int
-compat_do_replace(struct net *net, void __user *user, unsigned int len)
+compat_do_replace(struct net *net, sockptr_t arg, unsigned int len)
{
int ret;
struct compat_ip6t_replace tmp;
@@ -1501,7 +1501,7 @@ compat_do_replace(struct net *net, void __user *user, unsigned int len)
void *loc_cpu_entry;
struct ip6t_entry *iter;
- if (copy_from_user(&tmp, user, sizeof(tmp)) != 0)
+ if (copy_from_sockptr(&tmp, arg, sizeof(tmp)) != 0)
return -EFAULT;
/* overflow check */
@@ -1517,8 +1517,8 @@ compat_do_replace(struct net *net, void __user *user, unsigned int len)
return -ENOMEM;
loc_cpu_entry = newinfo->entries;
- if (copy_from_user(loc_cpu_entry, user + sizeof(tmp),
- tmp.size) != 0) {
+ sockptr_advance(arg, sizeof(tmp));
+ if (copy_from_sockptr(loc_cpu_entry, arg, tmp.size) != 0) {
ret = -EFAULT;
goto free_newinfo;
}
@@ -1619,7 +1619,7 @@ compat_get_entries(struct net *net, struct compat_ip6t_get_entries __user *uptr,
#endif
static int
-do_ip6t_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len)
+do_ip6t_set_ctl(struct sock *sk, int cmd, sockptr_t arg, unsigned int len)
{
int ret;
@@ -1630,14 +1630,14 @@ do_ip6t_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len)
case IP6T_SO_SET_REPLACE:
#ifdef CONFIG_COMPAT
if (in_compat_syscall())
- ret = compat_do_replace(sock_net(sk), user, len);
+ ret = compat_do_replace(sock_net(sk), arg, len);
else
#endif
- ret = do_replace(sock_net(sk), user, len);
+ ret = do_replace(sock_net(sk), arg, len);
break;
case IP6T_SO_SET_ADD_COUNTERS:
- ret = do_add_counters(sock_net(sk), USER_SOCKPTR(user), len);
+ ret = do_add_counters(sock_net(sk), arg, len);
break;
default:
diff --git a/net/netfilter/ipvs/ip_vs_ctl.c b/net/netfilter/ipvs/ip_vs_ctl.c
index 4af83f466dfc2c..bcac316addabe8 100644
--- a/net/netfilter/ipvs/ip_vs_ctl.c
+++ b/net/netfilter/ipvs/ip_vs_ctl.c
@@ -2434,7 +2434,7 @@ static void ip_vs_copy_udest_compat(struct ip_vs_dest_user_kern *udest,
}
static int
-do_ip_vs_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len)
+do_ip_vs_set_ctl(struct sock *sk, int cmd, sockptr_t ptr, unsigned int len)
{
struct net *net = sock_net(sk);
int ret;
@@ -2458,7 +2458,7 @@ do_ip_vs_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len)
return -EINVAL;
}
- if (copy_from_user(arg, user, len) != 0)
+ if (copy_from_sockptr(arg, ptr, len) != 0)
return -EFAULT;
/* Handle daemons since they have another lock */
diff --git a/net/netfilter/nf_sockopt.c b/net/netfilter/nf_sockopt.c
index 90469b1f628a8e..34afcd03b6f60e 100644
--- a/net/netfilter/nf_sockopt.c
+++ b/net/netfilter/nf_sockopt.c
@@ -89,7 +89,7 @@ static struct nf_sockopt_ops *nf_sockopt_find(struct sock *sk, u_int8_t pf,
return ops;
}
-int nf_setsockopt(struct sock *sk, u_int8_t pf, int val, char __user *opt,
+int nf_setsockopt(struct sock *sk, u_int8_t pf, int val, sockptr_t opt,
unsigned int len)
{
struct nf_sockopt_ops *ops;
--
2.27.0
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