netdev - Re: [PATCH net-next v10 17/19] psp: provide decapsulation and receive helper for drivers

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <ba4e41ef-2d68-495d-8450-8f27e3d0b8e7@redhat.com>
Date: Tue, 2 Sep 2025 12:28:02 +0200
From: Paolo Abeni <pabeni@...hat.com>
To: Daniel Zahka <daniel.zahka@...il.com>,
 Donald Hunter <donald.hunter@...il.com>, Jakub Kicinski <kuba@...nel.org>,
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
 Simon Horman <horms@...nel.org>, Jonathan Corbet <corbet@....net>,
 Andrew Lunn <andrew+netdev@...n.ch>
Cc: Saeed Mahameed <saeedm@...dia.com>, Leon Romanovsky <leon@...nel.org>,
 Tariq Toukan <tariqt@...dia.com>, Boris Pismenny <borisp@...dia.com>,
 Kuniyuki Iwashima <kuniyu@...gle.com>, Willem de Bruijn
 <willemb@...gle.com>, David Ahern <dsahern@...nel.org>,
 Neal Cardwell <ncardwell@...gle.com>, Patrisious Haddad
 <phaddad@...dia.com>, Raed Salem <raeds@...dia.com>,
 Jianbo Liu <jianbol@...dia.com>, Dragos Tatulea <dtatulea@...dia.com>,
 Rahul Rameshbabu <rrameshbabu@...dia.com>,
 Stanislav Fomichev <sdf@...ichev.me>,
 Toke Høiland-Jørgensen <toke@...hat.com>,
 Alexander Lobakin <aleksander.lobakin@...el.com>,
 Kiran Kella <kiran.kella@...adcom.com>,
 Jacob Keller <jacob.e.keller@...el.com>, netdev@...r.kernel.org
Subject: Re: [PATCH net-next v10 17/19] psp: provide decapsulation and receive
 helper for drivers

On 8/28/25 6:29 PM, Daniel Zahka wrote:
> +/* Receive handler for PSP packets.
> + *
> + * Presently it accepts only already-authenticated packets and does not
> + * support optional fields, such as virtualization cookies.
> + */
> +int psp_dev_rcv(struct sk_buff *skb, u16 dev_id, u8 generation, bool strip_icv)
> +{
> +	const struct psphdr *psph;
> +	int depth = 0, end_depth;
> +	struct psp_skb_ext *pse;
> +	struct ipv6hdr *ipv6h;
> +	struct ethhdr *eth;
> +	int encap_bytes;
> +	__be16 proto;
> +
> +	eth = (struct ethhdr *)(skb->data);
> +	proto = __vlan_get_protocol(skb, eth->h_proto, &depth);
> +	if (proto != htons(ETH_P_IPV6))
> +		return -EINVAL;
> +
> +	ipv6h = (struct ipv6hdr *)(skb->data + depth);
> +	depth += sizeof(*ipv6h);
> +	end_depth = depth + sizeof(struct udphdr) + sizeof(struct psphdr);

Why aren't you checking the next hdr being UDP? This could potentially
match unrelated packets.

Also I guess you need pskb_may_pull() above.

/P