From: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
[ Upstream commit 08e42a0d3ad30f276f9597b591f975971a1b0fcf ]
Add current size of rule expressions to the boundary check.
Fixes: 2c865a8a28a1 ("netfilter: nf_tables: add rule blob layout")
Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
net/netfilter/nf_tables_api.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index 8c74bb1ca78a0..368aeabd8f8f1 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -8921,7 +8921,7 @@ 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);
--
2.39.2
