From 875168a9330d3aa6481ce62ce8fa77c7be0c75fb Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Mon, 30 Aug 2010 11:07:25 +0000 Subject: net: tunnels should use rcu_dereference tunnel4_handlers, tunnel64_handlers, tunnel6_handlers and tunnel46_handlers are protected by RCU, but we dont use appropriate rcu primitives to scan them. rcu_lock() is already held by caller. Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller --- net/ipv6/tunnel6.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) (limited to 'net/ipv6') diff --git a/net/ipv6/tunnel6.c b/net/ipv6/tunnel6.c index d203e6d..3177fe0 100644 --- a/net/ipv6/tunnel6.c +++ b/net/ipv6/tunnel6.c @@ -88,6 +88,11 @@ int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family) EXPORT_SYMBOL(xfrm6_tunnel_deregister); +#define for_each_tunnel_rcu(head, handler) \ + for (handler = rcu_dereference(head); \ + handler != NULL; \ + handler = rcu_dereference(handler->next)) \ + static int tunnel6_rcv(struct sk_buff *skb) { struct xfrm6_tunnel *handler; @@ -95,7 +100,7 @@ static int tunnel6_rcv(struct sk_buff *skb) if (!pskb_may_pull(skb, sizeof(struct ipv6hdr))) goto drop; - for (handler = tunnel6_handlers; handler; handler = handler->next) + for_each_tunnel_rcu(tunnel6_handlers, handler) if (!handler->handler(skb)) return 0; @@ -113,7 +118,7 @@ static int tunnel46_rcv(struct sk_buff *skb) if (!pskb_may_pull(skb, sizeof(struct iphdr))) goto drop; - for (handler = tunnel46_handlers; handler; handler = handler->next) + for_each_tunnel_rcu(tunnel46_handlers, handler) if (!handler->handler(skb)) return 0; @@ -129,7 +134,7 @@ static void tunnel6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, { struct xfrm6_tunnel *handler; - for (handler = tunnel6_handlers; handler; handler = handler->next) + for_each_tunnel_rcu(tunnel6_handlers, handler) if (!handler->err_handler(skb, opt, type, code, offset, info)) break; } -- cgit v1.1