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netfilter pull request 23-06-07

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Merge tag 'nf-23-06-07' of git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf

Pablo Neira Ayuso says:

====================
Netfilter fixes for net

The following patchset contains Netfilter fixes for net:

1) Missing nul-check in basechain hook netlink dump path, from Gavrilov Ilia.

2) Fix bitwise register tracking, from Jeremy Sowden.

3) Null pointer dereference when accessing conntrack helper,
   from Tijs Van Buggenhout.

4) Add schedule point to ipset's call_ad, from Kuniyuki Iwashima.

5) Incorrect boundary check when building chain blob.

* tag 'nf-23-06-07' of git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf:
  netfilter: nf_tables: out-of-bound check in chain blob
  netfilter: ipset: Add schedule point in call_ad().
  netfilter: conntrack: fix NULL pointer dereference in nf_confirm_cthelper
  netfilter: nft_bitwise: fix register tracking
  netfilter: nf_tables: Add null check for nla_nest_start_noflag() in nft_dump_basechain_hook()
====================

Link: https://lore.kernel.org/r/20230606225851.67394-1-pablo@netfilter.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jakub Kicinski 2023-06-06 21:23:49 -07:00
commit 20c47646a2
4 changed files with 15 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
net/netfilter/ipset/ip_set_core.c
View File

@ -1694,6 +1694,14 @@ call_ad(struct net *net, struct sock *ctnl, struct sk_buff *skb,
bool eexist = flags & IPSET_FLAG_EXIST, retried = false;
do {
if (retried) {
__ip_set_get(set);
nfnl_unlock(NFNL_SUBSYS_IPSET);
cond_resched();
nfnl_lock(NFNL_SUBSYS_IPSET);
__ip_set_put(set);
}
ip_set_lock(set);
ret = set->variant->uadt(set, tb, adt, &lineno, flags, retried);
ip_set_unlock(set);

3
net/netfilter/nf_conntrack_core.c
View File

@ -2260,6 +2260,9 @@ static int nf_confirm_cthelper(struct sk_buff *skb, struct nf_conn *ct,
return 0;
helper = rcu_dereference(help->helper);
if (!helper)
return 0;
if (!(helper->flags & NF_CT_HELPER_F_USERSPACE))
return 0;

4
net/netfilter/nf_tables_api.c
View File

@ -1600,6 +1600,8 @@ static int nft_dump_basechain_hook(struct sk_buff *skb, int family,
if (nft_base_chain_netdev(family, ops->hooknum)) {
nest_devs = nla_nest_start_noflag(skb, NFTA_HOOK_DEVS);
if (!nest_devs)
goto nla_put_failure;
if (!hook_list)
hook_list = &basechain->hook_list;
@ -9005,7 +9007,7 @@ static int nf_tables_commit_chain_prepare(struct net *net, struct nft_chain *cha
continue;
}
if (WARN_ON_ONCE(data + expr->ops->size > data_boundary))
if (WARN_ON_ONCE(data + size + expr->ops->size > data_boundary))
return -ENOMEM;
memcpy(data + size, expr, expr->ops->size);

2
net/netfilter/nft_bitwise.c
View File

@ -323,7 +323,7 @@ static bool nft_bitwise_reduce(struct nft_regs_track *track,
dreg = priv->dreg;
regcount = DIV_ROUND_UP(priv->len, NFT_REG32_SIZE);
for (i = 0; i < regcount; i++, dreg++)
track->regs[priv->dreg].bitwise = expr;
track->regs[dreg].bitwise = expr;
return false;
}