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netfilter: x_tables: Update remaining dereference to RCU

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commit 443d6e86f821a165fae3fc3fc13086d27ac140b1 upstream.

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

Reported-by: kernel test robot <lkp@intel.com>
Fixes: cc00bcaa5899 ("netfilter: x_tables: Switch synchronization to RCU")
Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>
Reviewed-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Subash Abhinov Kasiviswanathan 2020-12-16 21:38:02 -07:00 committed by Greg Kroah-Hartman
parent 0c47135536
commit 954cc63f5d
3 changed files with 3 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
net/ipv4/netfilter/arp_tables.c
View File

@ -1405,7 +1405,7 @@ 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);

2
net/ipv4/netfilter/ip_tables.c
View File

@ -1619,7 +1619,7 @@ 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)

2
net/ipv6/netfilter/ip6_tables.c
View File

@ -1628,7 +1628,7 @@ 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)