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/core/addr.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/core/addr.c')
| -rw-r--r-- | drivers/infiniband/core/addr.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/infiniband/core/addr.c b/drivers/infiniband/core/addr.c index 236ad9a89c0a..f2a84c6f8543 100644 --- a/drivers/infiniband/core/addr.c +++ b/drivers/infiniband/core/addr.c @@ -215,7 +215,9 @@ static int addr4_resolve(struct sockaddr_in *src_in, neigh = neigh_lookup(&arp_tbl, &rt->rt_gateway, rt->dst.dev); if (!neigh || !(neigh->nud_state & NUD_VALID)) { + rcu_read_lock(); neigh_event_send(dst_get_neighbour(&rt->dst), NULL); + rcu_read_unlock(); ret = -ENODATA; if (neigh) goto release; @@ -273,15 +275,16 @@ static int addr6_resolve(struct sockaddr_in6 *src_in, goto put; } + rcu_read_lock(); neigh = dst_get_neighbour(dst); if (!neigh || !(neigh->nud_state & NUD_VALID)) { if (neigh) neigh_event_send(neigh, NULL); ret = -ENODATA; - goto put; + } else { + ret = rdma_copy_addr(addr, dst->dev, neigh->ha); } - - ret = rdma_copy_addr(addr, dst->dev, neigh->ha); + rcu_read_unlock(); put: dst_release(dst); return ret; |