[PATCH net 2/4] netfilter: x_tables: Update remaining dereference to RCU

[Pablo Neira Ayuso]

From: Subash Abhinov Kasiviswanathan <subas...@codeaurora.org>

This fixes the dereference to fetch the RCU pointer when holding
the appropriate xtables lock.

Reported-by: kernel test robot <l...@intel.com>
Fixes: cc00bcaa5899 ("netfilter: x_tables: Switch synchronization to RCU")
Signed-off-by: Subash Abhinov Kasiviswanathan <subas...@codeaurora.org>
Reviewed-by: Florian Westphal <f...@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pa...@netfilter.org>
---
 net/ipv4/netfilter/arp_tables.c | 2 +-
 net/ipv4/netfilter/ip_tables.c  | 2 +-
 net/ipv6/netfilter/ip6_tables.c | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/net/ipv4/netfilter/arp_tables.c b/net/ipv4/netfilter/arp_tables.c
index 563b62b76a5f..c576a63d09db 100644
--- a/net/ipv4/netfilter/arp_tables.c
+++ b/net/ipv4/netfilter/arp_tables.c
@@ -1379,7 +1379,7 @@ static int compat_get_entries(struct net *net,
        xt_compat_lock(NFPROTO_ARP);
        t = xt_find_table_lock(net, NFPROTO_ARP, get.name);
        if (!IS_ERR(t)) {
-               const struct xt_table_info *private = t->private;
+               const struct xt_table_info *private = 
xt_table_get_private_protected(t);
                struct xt_table_info info;
 
                ret = compat_table_info(private, &info);
diff --git a/net/ipv4/netfilter/ip_tables.c b/net/ipv4/netfilter/ip_tables.c
index 6e2851f8d3a3..e8f6f9d86237 100644
--- a/net/ipv4/netfilter/ip_tables.c
+++ b/net/ipv4/netfilter/ip_tables.c
@@ -1589,7 +1589,7 @@ compat_get_entries(struct net *net, struct 
compat_ipt_get_entries __user *uptr,
        xt_compat_lock(AF_INET);
        t = xt_find_table_lock(net, AF_INET, get.name);
        if (!IS_ERR(t)) {
-               const struct xt_table_info *private = t->private;
+               const struct xt_table_info *private = 
xt_table_get_private_protected(t);
                struct xt_table_info info;
                ret = compat_table_info(private, &info);
                if (!ret && get.size == info.size)
diff --git a/net/ipv6/netfilter/ip6_tables.c b/net/ipv6/netfilter/ip6_tables.c
index c4f532f4d311..0d453fa9e327 100644
--- a/net/ipv6/netfilter/ip6_tables.c
+++ b/net/ipv6/netfilter/ip6_tables.c
@@ -1598,7 +1598,7 @@ compat_get_entries(struct net *net, struct 
compat_ip6t_get_entries __user *uptr,
        xt_compat_lock(AF_INET6);
        t = xt_find_table_lock(net, AF_INET6, get.name);
        if (!IS_ERR(t)) {
-               const struct xt_table_info *private = t->private;
+               const struct xt_table_info *private = 
xt_table_get_private_protected(t);
                struct xt_table_info info;
                ret = compat_table_info(private, &info);
                if (!ret && get.size == info.size)
-- 
2.20.1