Commit 08e42a0d authored by Pablo Neira Ayuso's avatar Pablo Neira Ayuso
Browse files

netfilter: nf_tables: out-of-bound check in chain blob 



Add current size of rule expressions to the boundary check.

Fixes: 2c865a8a ("netfilter: nf_tables: add rule blob layout")
Signed-off-by: default avatarPablo Neira Ayuso <pablo@netfilter.org>
parent 24e22789

net/netfilter/nf_tables_api.c

+1 −1
Original line number Diff line number Diff line
@@ -9007,7 +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);