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| author |   Jarno Rajahalme <jrajahalme@nicira.com> | 2014-02-15 17:42:29 -0800 |
|---|---|---|
| committer |   Jesse Gross <jesse@nicira.com> | 2014-02-15 17:42:29 -0800 |
| commit | 42ee19e2939277a5277c307e517ce2d7ba5f0703 (patch) | |
| tree | 57448c732f703451d3e7a96ff9e736ea62acd1dc /net/openvswitch | |
| parent | openvswitch: Read tcp flags only then the tranport header is present. (diff) | |
| download | linux-dev-42ee19e2939277a5277c307e517ce2d7ba5f0703.tar.xz linux-dev-42ee19e2939277a5277c307e517ce2d7ba5f0703.zip | |
openvswitch: Fix race.
ovs_vport_cmd_dump() did rcu_read_lock() only after getting the
datapath, which could have been deleted in between. Resolved by
taking rcu_read_lock() before the get_dp() call.
Signed-off-by: Jarno Rajahalme <jrajahalme@nicira.com>
Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Diffstat (limited to 'net/openvswitch')
| -rw-r--r-- | net/openvswitch/datapath.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c index e42340d3f820..8601b320b443 100644 --- a/net/openvswitch/datapath.c +++ b/net/openvswitch/datapath.c @@ -1762,11 +1762,12 @@ static int ovs_vport_cmd_dump(struct sk_buff *skb, struct netlink_callback *cb) int bucket = cb->args[0], skip = cb->args[1]; int i, j = 0; + rcu_read_lock(); dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); - if (!dp) + if (!dp) { + rcu_read_unlock(); return -ENODEV; - - rcu_read_lock(); + } for (i = bucket; i < DP_VPORT_HASH_BUCKETS; i++) { struct vport *vport; |