netdev - [PATCH net-next 2/2] rxrpc: do not pull udp headers on receive

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: <1460043899-56894-3-git-send-email-willemdebruijn.kernel@gmail.com>
Date:	Thu,  7 Apr 2016 11:44:59 -0400
From:	Willem de Bruijn <willemdebruijn.kernel@...il.com>
To:	netdev@...r.kernel.org
Cc:	davem@...emloft.net, fcooper@...com, samanthakumar@...gle.com,
	Willem de Bruijn <willemb@...gle.com>
Subject: [PATCH net-next 2/2] rxrpc: do not pull udp headers on receive

From: Willem de Bruijn <willemb@...gle.com>

Commit e6afc8ace6dd modified the udp receive path by pulling the udp
header before queuing an skbuff onto the receive queue.

Rxrpc also calls skb_recv_datagram to dequeue an skb from a udp
socket. Modify this receive path to also no longer expect udp
headers.

Fixes: e6afc8ace6dd ("udp: remove headers from UDP packets before queueing")

Signed-off-by: Willem de Bruijn <willemb@...gle.com>
---
 net/rxrpc/ar-input.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/rxrpc/ar-input.c b/net/rxrpc/ar-input.c
index 63ed75c..4824a82 100644
--- a/net/rxrpc/ar-input.c
+++ b/net/rxrpc/ar-input.c
@@ -612,9 +612,9 @@ int rxrpc_extract_header(struct rxrpc_skb_priv *sp, struct sk_buff *skb)
 	struct rxrpc_wire_header whdr;
 
 	/* dig out the RxRPC connection details */
-	if (skb_copy_bits(skb, sizeof(struct udphdr), &whdr, sizeof(whdr)) < 0)
+	if (skb_copy_bits(skb, 0, &whdr, sizeof(whdr)) < 0)
 		return -EBADMSG;
-	if (!pskb_pull(skb, sizeof(struct udphdr) + sizeof(whdr)))
+	if (!pskb_pull(skb, sizeof(whdr)))
 		BUG();
 
 	memset(sp, 0, sizeof(*sp));
-- 
2.8.0.rc3.226.g39d4020