From 580da35a31f91a594f3090b7a2c39b85cb051a12 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Tue, 29 Nov 2011 22:31:23 +0100 Subject: IB: Fix RCU lockdep splats Commit f2c31e32b37 ("net: fix NULL dereferences in check_peer_redir()") forgot to take care of infiniband uses of dst neighbours. Many thanks to Marc Aurele who provided a nice bug report and feedback. Reported-by: Marc Aurele La France Signed-off-by: Eric Dumazet Cc: David Miller Cc: Signed-off-by: Roland Dreier --- drivers/infiniband/hw/nes/nes_cm.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'drivers/infiniband/hw/nes') diff --git a/drivers/infiniband/hw/nes/nes_cm.c b/drivers/infiniband/hw/nes/nes_cm.c index dfce9ea98a39..0a52d72371ee 100644 --- a/drivers/infiniband/hw/nes/nes_cm.c +++ b/drivers/infiniband/hw/nes/nes_cm.c @@ -1377,9 +1377,11 @@ static int nes_addr_resolve_neigh(struct nes_vnic *nesvnic, u32 dst_ip, int arpi neigh_release(neigh); } - if ((neigh == NULL) || (!(neigh->nud_state & NUD_VALID))) + if ((neigh == NULL) || (!(neigh->nud_state & NUD_VALID))) { + rcu_read_lock(); neigh_event_send(dst_get_neighbour(&rt->dst), NULL); - + rcu_read_unlock(); + } ip_rt_put(rt); return rc; } -- cgit v1.2.3