netfilter: nft_socket: remove WARN_ON_ONCE with huge level value

syzbot managed to reach this WARN_ON_ONCE by passing a huge level
value, remove it.

  WARNING: CPU: 0 PID: 5853 at net/netfilter/nft_socket.c:220 nft_socket_init+0x2f4/0x3d0 net/netfilter/nft_socket.c:220

Reported-by: syzbot+a225fea35d7baf8dbdc3@syzkaller.appspotmail.com
Acked-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

diff --git a/net/netfilter/nft_socket.c b/net/netfilter/nft_socket.c
index 35d0409b009501661d8b668889efeb100b0db737..36affbb697c2fd56d51fe89b709ce98a21442467 100644 (file)
--- a/net/netfilter/nft_socket.c
+++ b/net/netfilter/nft_socket.c
@@ -217,7 +217,7 @@ static int nft_socket_init(const struct nft_ctx *ctx,
 
                level += err;
                /* Implies a giant cgroup tree */
-               if (WARN_ON_ONCE(level > 255))
+               if (level > 255)
                        return -EOPNOTSUPP;
 
                priv->level = level;