diff options
| author | Eric Dumazet <eric.dumazet@gmail.com> | 2011-11-29 22:31:23 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-12-09 08:55:21 -0800 |
| commit | de5f8dc38303f9a1fc58349f0d1c6f46a8034a00 (patch) | |
| tree | 2530f980d5062f29ec7b2d78e2a83aa7c7a9e25e /drivers/infiniband/ulp/ipoib/ipoib_multicast.c | |
| parent | 829d5a92cbfe6e906bbe24a5bb1675a6d27a5db2 (diff) | |
IB: Fix RCU lockdep splats
commit 580da35a31f91a594f3090b7a2c39b85cb051a12 upstream.
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 <tsi@ualberta.ca>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: David Miller <davem@davemloft.net>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/infiniband/ulp/ipoib/ipoib_multicast.c')
| -rw-r--r-- | drivers/infiniband/ulp/ipoib/ipoib_multicast.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c index ecea4fe1ed0..a8d2a891b84 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c @@ -265,7 +265,7 @@ static int ipoib_mcast_join_finish(struct ipoib_mcast *mcast, skb->dev = dev; if (dst) - n = dst_get_neighbour(dst); + n = dst_get_neighbour_raw(dst); if (!dst || !n) { /* put pseudoheader back on for next time */ skb_push(skb, sizeof (struct ipoib_pseudoheader)); @@ -721,6 +721,8 @@ out: if (mcast && mcast->ah) { struct dst_entry *dst = skb_dst(skb); struct neighbour *n = NULL; + + rcu_read_lock(); if (dst) n = dst_get_neighbour(dst); if (n && !*to_ipoib_neigh(n)) { @@ -733,7 +735,7 @@ out: list_add_tail(&neigh->list, &mcast->neigh_list); } } - + rcu_read_unlock(); spin_unlock_irqrestore(&priv->lock, flags); ipoib_send(dev, skb, mcast->ah, IB_MULTICAST_QPN); return; |