Currently netadmin inside non-trusted container can quickly allocate
whole node's memory via request of huge ipset hashtable.
Other ipset-related memory allocations should be restricted too.
Signed-off-by: Vasily Averin <vvs@xxxxxxxxxxxxx>
---
net/netfilter/ipset/ip_set_core.c | 17 +----------------
1 file changed, 1 insertion(+), 16 deletions(-)
diff --git a/net/netfilter/ipset/ip_set_core.c b/net/netfilter/ipset/ip_set_core.c
index 920b7c4..e9fe34a 100644
--- a/net/netfilter/ipset/ip_set_core.c
+++ b/net/netfilter/ipset/ip_set_core.c
@@ -250,22 +250,7 @@ static struct ip_set_net *ip_set_pernet(struct net *net)
void *
ip_set_alloc(size_t size)
{
- void *members = NULL;
-
- if (size < KMALLOC_MAX_SIZE)
- members = kzalloc(size, GFP_KERNEL | __GFP_NOWARN);
-
- if (members) {
- pr_debug("%p: allocated with kmalloc\n", members);
- return members;
- }
-
- members = vzalloc(size);
- if (!members)
- return NULL;
- pr_debug("%p: allocated with vmalloc\n", members);
-
- return members;
+ return kvzalloc(size, GFP_KERNEL_ALLOC);
}
EXPORT_SYMBOL_GPL(ip_set_alloc);
--
1.8.3.1
