An untrusted netadmin inside a memcg-limited container can create a
huge number of routing entries. Currently, allocated kernel objects
are not accounted to proper memcg, so this can lead to global memory
shortage on the host and cause lot of OOM kiils.
This patches enables accounting for 'struct rt6_info' allocations.
---
net/ipv6/route.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 1536f49..d1d7cdf 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -6526,7 +6526,7 @@ int __init ip6_route_init(void)
ret = -ENOMEM;
ip6_dst_ops_template.kmem_cachep =
kmem_cache_create("ip6_dst_cache", sizeof(struct rt6_info), 0,
- SLAB_HWCACHE_ALIGN, NULL);
+ SLAB_HWCACHE_ALIGN | SLAB_ACCOUNT, NULL);
if (!ip6_dst_ops_template.kmem_cachep)
goto out;
--
1.8.3.1
