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Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf

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Pablo Neira Ayuso says:

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

The following patchset contains Netfilter fixes for net:

1) Fix bogus EEXIST on element insertions to the rbtree with timeouts,
   from Stefano Brivio.

2) Preempt BUG splat in the pipapo element insertion path, also from
   Stefano.

3) Release filter from the ctnetlink error path.

4) Release flowtable hooks from the deletion path.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2020-06-15 13:27:13 -07:00
commit 38af8f2d60
4 changed files with 65 additions and 25 deletions
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32
net/netfilter/nf_conntrack_netlink.c
View file

@ -939,7 +939,8 @@ ctnetlink_alloc_filter(const struct nlattr * const cda[], u8 family)
filter->mark.mask = 0xffffffff;
}
} else if (cda[CTA_MARK_MASK]) {
return ERR_PTR(-EINVAL);
err = -EINVAL;
goto err_filter;
}
#endif
if (!cda[CTA_FILTER])
@ -947,15 +948,17 @@ ctnetlink_alloc_filter(const struct nlattr * const cda[], u8 family)
err = ctnetlink_parse_zone(cda[CTA_ZONE], &filter->zone);
if (err < 0)
return ERR_PTR(err);
goto err_filter;
err = ctnetlink_parse_filter(cda[CTA_FILTER], filter);
if (err < 0)
return ERR_PTR(err);
goto err_filter;
if (filter->orig_flags) {
if (!cda[CTA_TUPLE_ORIG])
return ERR_PTR(-EINVAL);
if (!cda[CTA_TUPLE_ORIG]) {
err = -EINVAL;
goto err_filter;
}
err = ctnetlink_parse_tuple_filter(cda, &filter->orig,
CTA_TUPLE_ORIG,
@ -963,23 +966,32 @@ ctnetlink_alloc_filter(const struct nlattr * const cda[], u8 family)
&filter->zone,
filter->orig_flags);
if (err < 0)
return ERR_PTR(err);
goto err_filter;
}
if (filter->reply_flags) {
if (!cda[CTA_TUPLE_REPLY])
return ERR_PTR(-EINVAL);
if (!cda[CTA_TUPLE_REPLY]) {
err = -EINVAL;
goto err_filter;
}
err = ctnetlink_parse_tuple_filter(cda, &filter->reply,
CTA_TUPLE_REPLY,
filter->family,
&filter->zone,
filter->orig_flags);
if (err < 0)
return ERR_PTR(err);
if (err < 0) {
err = -EINVAL;
goto err_filter;
}
}
return filter;
err_filter:
kfree(filter);
return ERR_PTR(err);
}
static bool ctnetlink_needs_filter(u8 family, const struct nlattr * const *cda)

31
net/netfilter/nf_tables_api.c
View file

@ -6550,12 +6550,22 @@ static int nf_tables_newflowtable(struct net *net, struct sock *nlsk,
return err;
}
static void nft_flowtable_hook_release(struct nft_flowtable_hook *flowtable_hook)
{
struct nft_hook *this, *next;
list_for_each_entry_safe(this, next, &flowtable_hook->list, list) {
list_del(&this->list);
kfree(this);
}
}
static int nft_delflowtable_hook(struct nft_ctx *ctx,
struct nft_flowtable *flowtable)
{
const struct nlattr * const *nla = ctx->nla;
struct nft_flowtable_hook flowtable_hook;
struct nft_hook *this, *next, *hook;
struct nft_hook *this, *hook;
struct nft_trans *trans;
int err;
@ -6564,33 +6574,40 @@ static int nft_delflowtable_hook(struct nft_ctx *ctx,
if (err < 0)
return err;
list_for_each_entry_safe(this, next, &flowtable_hook.list, list) {
list_for_each_entry(this, &flowtable_hook.list, list) {
hook = nft_hook_list_find(&flowtable->hook_list, this);
if (!hook) {
err = -ENOENT;
goto err_flowtable_del_hook;
}
hook->inactive = true;
list_del(&this->list);
kfree(this);
}
trans = nft_trans_alloc(ctx, NFT_MSG_DELFLOWTABLE,
sizeof(struct nft_trans_flowtable));
if (!trans)
return -ENOMEM;
if (!trans) {
err = -ENOMEM;
goto err_flowtable_del_hook;
}
nft_trans_flowtable(trans) = flowtable;
nft_trans_flowtable_update(trans) = true;
INIT_LIST_HEAD(&nft_trans_flowtable_hooks(trans));
nft_flowtable_hook_release(&flowtable_hook);
list_add_tail(&trans->list, &ctx->net->nft.commit_list);
return 0;
err_flowtable_del_hook:
list_for_each_entry(hook, &flowtable_hook.list, list)
list_for_each_entry(this, &flowtable_hook.list, list) {
hook = nft_hook_list_find(&flowtable->hook_list, this);
if (!hook)
break;
hook->inactive = false;
}
nft_flowtable_hook_release(&flowtable_hook);
return err;
}

6
net/netfilter/nft_set_pipapo.c
View file

@ -1242,7 +1242,9 @@ static int nft_pipapo_insert(const struct net *net, const struct nft_set *set,
end += NFT_PIPAPO_GROUPS_PADDED_SIZE(f);
}
if (!*this_cpu_ptr(m->scratch) || bsize_max > m->bsize_max) {
if (!*get_cpu_ptr(m->scratch) || bsize_max > m->bsize_max) {
put_cpu_ptr(m->scratch);
err = pipapo_realloc_scratch(m, bsize_max);
if (err)
return err;
@ -1250,6 +1252,8 @@ static int nft_pipapo_insert(const struct net *net, const struct nft_set *set,
this_cpu_write(nft_pipapo_scratch_index, false);
m->bsize_max = bsize_max;
} else {
put_cpu_ptr(m->scratch);
}
*ext2 = &e->ext;

21
net/netfilter/nft_set_rbtree.c
View file

@ -271,12 +271,14 @@ static int __nft_rbtree_insert(const struct net *net, const struct nft_set *set,
if (nft_rbtree_interval_start(new)) {
if (nft_rbtree_interval_end(rbe) &&
nft_set_elem_active(&rbe->ext, genmask))
nft_set_elem_active(&rbe->ext, genmask) &&
!nft_set_elem_expired(&rbe->ext))
overlap = false;
} else {
overlap = nft_rbtree_interval_end(rbe) &&
nft_set_elem_active(&rbe->ext,
genmask);
genmask) &&
!nft_set_elem_expired(&rbe->ext);
}
} else if (d > 0) {
p = &parent->rb_right;
@ -284,9 +286,11 @@ static int __nft_rbtree_insert(const struct net *net, const struct nft_set *set,
if (nft_rbtree_interval_end(new)) {
overlap = nft_rbtree_interval_end(rbe) &&
nft_set_elem_active(&rbe->ext,
genmask);
genmask) &&
!nft_set_elem_expired(&rbe->ext);
} else if (nft_rbtree_interval_end(rbe) &&
nft_set_elem_active(&rbe->ext, genmask)) {
nft_set_elem_active(&rbe->ext, genmask) &&
!nft_set_elem_expired(&rbe->ext)) {
overlap = true;
}
} else {
@ -294,15 +298,18 @@ static int __nft_rbtree_insert(const struct net *net, const struct nft_set *set,
nft_rbtree_interval_start(new)) {
p = &parent->rb_left;
if (nft_set_elem_active(&rbe->ext, genmask))
if (nft_set_elem_active(&rbe->ext, genmask) &&
!nft_set_elem_expired(&rbe->ext))
overlap = false;
} else if (nft_rbtree_interval_start(rbe) &&
nft_rbtree_interval_end(new)) {
p = &parent->rb_right;
if (nft_set_elem_active(&rbe->ext, genmask))
if (nft_set_elem_active(&rbe->ext, genmask) &&
!nft_set_elem_expired(&rbe->ext))
overlap = false;
} else if (nft_set_elem_active(&rbe->ext, genmask)) {
} else if (nft_set_elem_active(&rbe->ext, genmask) &&
!nft_set_elem_expired(&rbe->ext)) {
*ext = &rbe->ext;
return -EEXIST;
} else {