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netfilter: switch nf_setsockopt to sockptr_t

Browse Source 
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>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Christoph Hellwig 2020-07-23 08:08:54 +02:00 committed by David S. Miller
parent ab214d1bf8
commit c2f12630c6
10 changed files with 68 additions and 66 deletions
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6
include/linux/netfilter.h
View File

@ -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);

37
net/bridge/netfilter/ebtables.c
View File

@ -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;

3
net/decnet/af_decnet.c
View File

@ -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;

3
net/ipv4/ip_sockglue.c
View File

@ -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;
}

28
net/ipv4/netfilter/arp_tables.c
View File

@ -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:

24
net/ipv4/netfilter/ip_tables.c
View File

@ -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:

3
net/ipv6/ipv6_sockglue.c
View File

@ -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;
}

24
net/ipv6/netfilter/ip6_tables.c
View File

@ -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:

4
net/netfilter/ipvs/ip_vs_ctl.c
View File

@ -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 */

2
net/netfilter/nf_sockopt.c
View File

@ -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;