From 49d61e2390c92bd226fc395a6165eb5a65ae4de6 Mon Sep 17 00:00:00 2001 From: Eric Dumazet <eric.dumazet@gmail.com> Date: Thu, 9 Sep 2010 05:33:43 +0000 Subject: [PATCH] tunnels: missing rcu_assign_pointer() xfrm4_tunnel_register() & xfrm6_tunnel_register() should use rcu_assign_pointer() to make sure previous writes (to handler->next) are committed to memory before chain insertion. deregister functions dont need a particular barrier. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> --- net/ipv4/tunnel4.c | 2 +- net/ipv6/tunnel6.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/net/ipv4/tunnel4.c b/net/ipv4/tunnel4.c index df59d16337f2..9a17bd2a0a37 100644 --- a/net/ipv4/tunnel4.c +++ b/net/ipv4/tunnel4.c @@ -39,7 +39,7 @@ int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family) } handler->next = *pprev; - *pprev = handler; + rcu_assign_pointer(*pprev, handler); ret = 0; diff --git a/net/ipv6/tunnel6.c b/net/ipv6/tunnel6.c index 3177fe0459e0..d9864725d0c6 100644 --- a/net/ipv6/tunnel6.c +++ b/net/ipv6/tunnel6.c @@ -51,7 +51,7 @@ int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family) } handler->next = *pprev; - *pprev = handler; + rcu_assign_pointer(*pprev, handler); ret = 0; -- GitLab